US20130105559A1 - Conductive sidewall for microbumps - Google Patents

Conductive sidewall for microbumps Download PDF

Info

Publication number
US20130105559A1
US20130105559A1 US13/713,822 US201213713822A US2013105559A1 US 20130105559 A1 US20130105559 A1 US 20130105559A1 US 201213713822 A US201213713822 A US 201213713822A US 2013105559 A1 US2013105559 A1 US 2013105559A1
Authority
US
United States
Prior art keywords
microbumps
layer
substrate
conductive material
depositing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/713,822
Inventor
Arvind Chandrasekaran
Shiqun Gu
Christine S. Hau-Riege
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to US13/713,822 priority Critical patent/US20130105559A1/en
Assigned to QUALCOMM INCORPORATED reassignment QUALCOMM INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHANDRASEKARAN, ARVIND, GU, SHIQUN, HAU-RIEGE, CHRISTINE S.
Assigned to QUALCOMM INCORPORATED reassignment QUALCOMM INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHANDRASEKARAN, ARVIND, GU, SHIQUN, HAU-RIEGE, CHRISTINE S.
Publication of US20130105559A1 publication Critical patent/US20130105559A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/80Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
    • H01L24/81Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a bump connector
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
    • H01L21/71Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/768Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
    • H01L21/76838Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
    • H01L21/76877Filling of holes, grooves or trenches, e.g. vias, with conductive material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/48Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/488Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
    • H01L23/498Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
    • H01L23/49811Additional leads joined to the metallisation on the insulating substrate, e.g. pins, bumps, wires, flat leads
    • H01L23/49816Spherical bumps on the substrate for external connection, e.g. ball grid arrays [BGA]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/02Bonding areas ; Manufacturing methods related thereto
    • H01L24/03Manufacturing methods
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/02Bonding areas ; Manufacturing methods related thereto
    • H01L24/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L24/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/10Bump connectors ; Manufacturing methods related thereto
    • H01L24/11Manufacturing methods
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/10Bump connectors ; Manufacturing methods related thereto
    • H01L24/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L24/13Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/10Bump connectors ; Manufacturing methods related thereto
    • H01L24/15Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L24/16Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/03Manufacturing methods
    • H01L2224/034Manufacturing methods by blanket deposition of the material of the bonding area
    • H01L2224/03444Manufacturing methods by blanket deposition of the material of the bonding area in gaseous form
    • H01L2224/0345Physical vapour deposition [PVD], e.g. evaporation, or sputtering
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/03Manufacturing methods
    • H01L2224/034Manufacturing methods by blanket deposition of the material of the bonding area
    • H01L2224/0346Plating
    • H01L2224/03462Electroplating
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/03Manufacturing methods
    • H01L2224/034Manufacturing methods by blanket deposition of the material of the bonding area
    • H01L2224/0346Plating
    • H01L2224/03464Electroless plating
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/03Manufacturing methods
    • H01L2224/0347Manufacturing methods using a lift-off mask
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/03Manufacturing methods
    • H01L2224/036Manufacturing methods by patterning a pre-deposited material
    • H01L2224/0361Physical or chemical etching
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/0401Bonding areas specifically adapted for bump connectors, e.g. under bump metallisation [UBM]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/05001Internal layers
    • H01L2224/05099Material
    • H01L2224/051Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/0554External layer
    • H01L2224/0556Disposition
    • H01L2224/05567Disposition the external layer being at least partially embedded in the surface
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/0554External layer
    • H01L2224/05599Material
    • H01L2224/056Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/11Manufacturing methods
    • H01L2224/114Manufacturing methods by blanket deposition of the material of the bump connector
    • H01L2224/11444Manufacturing methods by blanket deposition of the material of the bump connector in gaseous form
    • H01L2224/1145Physical vapour deposition [PVD], e.g. evaporation, or sputtering
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/11Manufacturing methods
    • H01L2224/114Manufacturing methods by blanket deposition of the material of the bump connector
    • H01L2224/1146Plating
    • H01L2224/11462Electroplating
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/11Manufacturing methods
    • H01L2224/114Manufacturing methods by blanket deposition of the material of the bump connector
    • H01L2224/1146Plating
    • H01L2224/11464Electroless plating
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/11Manufacturing methods
    • H01L2224/1147Manufacturing methods using a lift-off mask
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/11Manufacturing methods
    • H01L2224/1147Manufacturing methods using a lift-off mask
    • H01L2224/11472Profile of the lift-off mask
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/11Manufacturing methods
    • H01L2224/116Manufacturing methods by patterning a pre-deposited material
    • H01L2224/1161Physical or chemical etching
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/11Manufacturing methods
    • H01L2224/118Post-treatment of the bump connector
    • H01L2224/11848Thermal treatments, e.g. annealing, controlled cooling
    • H01L2224/11849Reflowing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/11Manufacturing methods
    • H01L2224/119Methods of manufacturing bump connectors involving a specific sequence of method steps
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L2224/13Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • H01L2224/13001Core members of the bump connector
    • H01L2224/1301Shape
    • H01L2224/13016Shape in side view
    • H01L2224/13017Shape in side view being non uniform along the bump connector
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L2224/13Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • H01L2224/13001Core members of the bump connector
    • H01L2224/1301Shape
    • H01L2224/13016Shape in side view
    • H01L2224/13018Shape in side view comprising protrusions or indentations
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L2224/13Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • H01L2224/13001Core members of the bump connector
    • H01L2224/1302Disposition
    • H01L2224/13021Disposition the bump connector being disposed in a recess of the surface
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L2224/13Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • H01L2224/13001Core members of the bump connector
    • H01L2224/1302Disposition
    • H01L2224/13023Disposition the whole bump connector protruding from the surface
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L2224/13Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • H01L2224/13001Core members of the bump connector
    • H01L2224/13075Plural core members
    • H01L2224/13076Plural core members being mutually engaged together, e.g. through inserts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L2224/13Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • H01L2224/13001Core members of the bump connector
    • H01L2224/13099Material
    • H01L2224/131Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
    • H01L2224/13101Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of less than 400°C
    • H01L2224/13111Tin [Sn] as principal constituent
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L2224/13Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • H01L2224/13001Core members of the bump connector
    • H01L2224/13099Material
    • H01L2224/131Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
    • H01L2224/13138Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
    • H01L2224/13147Copper [Cu] as principal constituent
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
    • H01L2224/13Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
    • H01L2224/13001Core members of the bump connector
    • H01L2224/13099Material
    • H01L2224/131Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
    • H01L2224/13138Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
    • H01L2224/13155Nickel [Ni] as principal constituent
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/15Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L2224/16Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
    • H01L2224/1605Shape
    • H01L2224/16057Shape in side view
    • H01L2224/16058Shape in side view being non uniform along the bump connector
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/15Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L2224/16Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
    • H01L2224/161Disposition
    • H01L2224/16135Disposition the bump connector connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
    • H01L2224/16145Disposition the bump connector connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being stacked
    • H01L2224/16148Disposition the bump connector connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being stacked the bump connector connecting to a bonding area protruding from the surface
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/80Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
    • H01L2224/81Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a bump connector
    • H01L2224/8119Arrangement of the bump connectors prior to mounting
    • H01L2224/81193Arrangement of the bump connectors prior to mounting wherein the bump connectors are disposed on both the semiconductor or solid-state body and another item or body to be connected to the semiconductor or solid-state body
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/80Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
    • H01L2224/81Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a bump connector
    • H01L2224/812Applying energy for connecting
    • H01L2224/81201Compression bonding
    • H01L2224/81203Thermocompression bonding, e.g. diffusion bonding, pressure joining, thermocompression welding or solid-state welding
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/80Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
    • H01L2224/81Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a bump connector
    • H01L2224/818Bonding techniques
    • H01L2224/81801Soldering or alloying
    • H01L2224/81815Reflow soldering
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2225/00Details relating to assemblies covered by the group H01L25/00 but not provided for in its subgroups
    • H01L2225/03All the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/648 and H10K99/00
    • H01L2225/04All the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/648 and H10K99/00 the devices not having separate containers
    • H01L2225/065All the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/648 and H10K99/00 the devices not having separate containers the devices being of a type provided for in group H01L27/00
    • H01L2225/06503Stacked arrangements of devices
    • H01L2225/06513Bump or bump-like direct electrical connections between devices, e.g. flip-chip connection, solder bumps
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/74Apparatus for manufacturing arrangements for connecting or disconnecting semiconductor or solid-state bodies
    • H01L24/741Apparatus for manufacturing means for bonding, e.g. connectors
    • H01L24/742Apparatus for manufacturing bump connectors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/065Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L27/00
    • H01L25/0657Stacked arrangements of devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/50Multistep manufacturing processes of assemblies consisting of devices, each device being of a type provided for in group H01L27/00 or H01L29/00
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001Technical content checked by a classifier
    • H01L2924/00013Fully indexed content
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001Technical content checked by a classifier
    • H01L2924/00014Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01022Titanium [Ti]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01029Copper [Cu]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01033Arsenic [As]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/01047Silver [Ag]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01Chemical elements
    • H01L2924/0105Tin [Sn]
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/013Alloys
    • H01L2924/014Solder alloys
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/11Device type
    • H01L2924/12Passive devices, e.g. 2 terminal devices
    • H01L2924/1204Optical Diode
    • H01L2924/12042LASER
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/11Device type
    • H01L2924/12Passive devices, e.g. 2 terminal devices
    • H01L2924/1204Optical Diode
    • H01L2924/12044OLED
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/11Device type
    • H01L2924/14Integrated circuits
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/30Technical effects
    • H01L2924/38Effects and problems related to the device integration
    • H01L2924/384Bump effects
    • H01L2924/3841Solder bridging

Definitions

  • the present disclosure generally relates to integrated circuits.
  • the present disclosure relates to packaging integrated circuits.
  • Microbumps are small diameter solder connections between a first die and a second die or between a die and a packaging substrate.
  • the small diameter of the microbumps allows high density connections to the die, however, the high density may result in shorting or bridging between connections.
  • FIG. 1 is a cross-sectional view of two substrates connected through conventional microbumps.
  • a first substrate 110 having copper pillars 112 faces a second substrate 120 having copper pillars 122 .
  • a solder 130 connects pillars of the copper pillars 112 with pillars of the copper pillars 122 .
  • the combination of the copper pillars 122 and the solder 130 is a microbump.
  • bridging or shorting may occur such as, for example, in a region 132 .
  • microbumps also increases the current density through the microbumps. Increases in current density cause electromigration in the microbumps. Electromigration is the movement of metal atoms resulting from momentum transfer by electrons to the metal atoms. Electromigration causes voids in the microbumps, which reduces reliability of the connections and leads to failure of integrated circuits containing the microbumps.
  • Microbumps are conventionally made from solder materials such as tin and silver, which suffer from electromigration. Copper reduces electromigration effects, but is too rigid for reliable assembly or operation in integrated circuits.
  • a method includes forming an opening in a sacrificial layer on a contact pad of a substrate. The method also includes depositing a first conductive layer covering sidewalk of the opening and the bottom of the opening. The method further includes depositing a second conductive layer inside the first conductive layer, the second conductive layer having a lower melting point than the first conductive layer.
  • a method includes selecting a first substrate with microbumps having a first conductive material and a second conductive material substantially contained within the first conductive material.
  • the method also includes selecting a second substrate with microbumps having a first conductive material and a second conductive material substantially contained within the first conductive material.
  • the method further includes aligning microbumps of the first substrate with microbumps of the second substrate.
  • the method also includes forming a bond between microbumps of the first substrate and microbumps of the second substrate such that the second, conductive material is substantially contained inside the first conductive material and the first conductive material of the microbumps of the first substrate contacts with the first conductive material of the microbumps of the second substrate.
  • an apparatus includes a first substrate coupled to a second substrate.
  • the apparatus also includes a packaging connection coupling the first substrate to the second substrate.
  • the packaging connection has a shell of first conductive material around a second conductive material.
  • the first conductive material has a higher melting point than the second conductive material.
  • an apparatus includes an outer shell connecting means for reducing electromigration.
  • the outer shell connecting means communicates with a first substrate and is capable of connecting with an outer shell connecting means of a second substrate.
  • the apparatus also includes a solder connecting means of the first substrate for connecting with a solder connecting means of the second, substrate.
  • the solder connecting means of the first substrate resides within the outer shell connecting means of the first substrate.
  • FIG. 1 is a cross-sectional view of two substrates connected through conventional microbumps.
  • FIG. 2A-2J are cross-sectional views of a layer structure for manufacturing microbumps according to one embodiment.
  • FIG. 3 is a flow chart illustrating an exemplary process for manufacturing microbumps according to one embodiment.
  • FIGS. 4A-4F are cross-sectional views illustrating an exemplary layer structure for a microbump according to one embodiment.
  • FIG. 5 is a flow chart illustrating an exemplary method for forming the microbump with shell according to one embodiment.
  • FIG. 6 is a block diagram showing an exemplary wireless communication system in which an embodiment of the disclosure may be advantageously employed.
  • FIG. 7 is a block diagram illustrating a design workstation used for circuit, layout, and logic design of a semiconductor component according to one embodiment.
  • a copper sidewall is constructed around a solder microbump to improve reliability of the microbump connections.
  • the solder provides flexibility during assembly, and the copper reduces electromigration. Additionally, a copper sidewall prevents lateral migration of the solder, reducing bridges and shorts between microbumps.
  • FIGS. 2A-2J are cross-sectional views of a layer structure for manufacturing microbumps according to one embodiment.
  • a flow chart illustrating an exemplary process for manufacturing microbumps according to one embodiment is shown in FIG. 3 and will be presented, with FIGS. 2A-2J .
  • a flow chart 300 begins at block 310 with depositing an underbump metal (UBM) layer.
  • FIG. 2A is a cross-sectional view illustrating an exemplary layer structure after depositing a UBM according to one embodiment.
  • a substrate 202 includes back-end-of-line (BEOL) layers 204 .
  • the substrate 202 may be a semiconductor material or an organic material.
  • a passivation layer 206 is deposited on the BEOL layers 204 followed by a UBM layer 208 .
  • An opening in the passivation layer 206 may correspond to a contact pad for coupling the BEOL layers 204 to a microbump.
  • the UBM layer 208 is conformally deposited over the passivation layer 206 and the BEOL layers 204 .
  • FIG. 2B is a cross-sectional view illustrating an exemplary layer structure after deposition of a sacrificial layer according to one embodiment.
  • a sacrificial layer 210 is deposited on the UBM layer 208 .
  • the sacrificial layer 210 may be a photoresist layer.
  • FIG. 2C is a cross-sectional view illustrating an exemplary layer structure after patterning of the sacrificial layer and depositing a seed layer according to one embodiment.
  • An opening 250 is patterned in the sacrificial layer 210 .
  • the opening 250 corresponds with a contact pad in the BEOL layers 204 and an opening in the passivation layer 206 .
  • a seed layer 212 is deposited on the sacrificial layer 210 and the UBM layer 208 .
  • the seed layer 212 is a titanium and copper bilaver deposited through physical vapor deposition (PVD).
  • FIG. 2D is a cross-sectional view illustrating an exemplary layer structure after patterning of the seed layer according to one embodiment.
  • the seed layer 212 is removed from the top of the sacrificial layer 210 .
  • a reactive ion etch (RIE) patterns the seed layer 212 .
  • RIE reactive ion etch
  • ions bombard the surface of the seed layer 212 and have a trajectory normal to the surface of the top surface of the seed layer 212 .
  • the seed layer 212 may be removed from the top of the sacrificial layer 210 while remaining on sidewalls of the opening 250 .
  • FIG. 2E is a cross-sectional view illustrating an exemplary layer structure after depositing a copper shell according to one embodiment.
  • a conductive shell 220 is deposited in the opening 250 .
  • the shell 220 is electrodeposited by immersing the seed layer 212 in a copper electrolyte while applying a voltage to the seed layer 212 .
  • the shell 220 is nickel deposited by electroplating.
  • the electrodeposition may be conformal resulting in a shape of the conductive shell 220 correlating with the opening 250 .
  • the copper electrolyte may include additives such as accelerators, directional controls, and inhibitors to achieve suitable conformality of the opening 250 .
  • FIG. 2F is a cross-sectional view illustrating an exemplary layer structure after depositing solder according to one embodiment.
  • a solder 222 is deposited in the shell 220 .
  • the solder 222 is a tin-silver alloy electroplated in the shell 220 .
  • FIG. 2G is a cross-sectional view illustrating an exemplary layer structure after stripping the sacrificial layer according to one embodiment.
  • the sacrificial layer 210 is removed. According to one embodiment, the sacrificial layer 210 is removed through a wet chemical etch.
  • FIG. 2H is a cross-sectional view illustrating an exemplary layer structure after solder reflow according to one embodiment.
  • the solder 222 is reflowed by applying a high temperature to the solder 222 during which the solder 222 forms a ball or rounded surface.
  • the shell 220 has a melting temperature higher than the solder 222 such that the shell 220 does not reflow during reflow of the solder 222 .
  • FIG. 21 is a cross-sectional view illustrating two exemplary substrates after pick and place according to one embodiment.
  • a second substrate 230 having solder 232 is aligned to the solder 222 of the substrate 202 .
  • the substrate 230 has a symmetric structure around the solder 232 corresponding to the structure around the solder 222 on the substrate 202 .
  • the solder 232 on the substrate 230 may have an asymmetric shape to the solder 222 on the substrate 202 .
  • FIG. 21 is a cross-sectional view illustrating two exemplary bonded substrates according to one embodiment.
  • the solder 222 and the solder 232 are bonded together.
  • thermo compression bonding is performed to make contact between the conductive shell 220 of the substrate 202 and a conductive shell 234 of the substrate 230 .
  • some solder beading may occur as the solder 222 beads outside the conductive shell 220 and the conductive shell 234 .
  • the conductive shell 234 is 1-5 micrometers in thickness, and the solder 232 is 5-20 micrometers in diameter.
  • the shell of the microbump may be deposited through electrodeposition techniques such as, for example, electroless deposition.
  • FIGS. 4A-4F are cross-sectional views illustrating an exemplary layer structure for a microbump according to one embodiment.
  • FIG. 5 is a flow chart illustrating an exemplary method for forming the microbump with shell according to this embodiment.
  • FIG. 4A is a cross-sectional view illustrating an exemplary layer structure after patterning a sacrificial layer according to one embodiment.
  • a sacrificial layer 406 is deposited on a BEOL layer 404 on a substrate 402 .
  • the sacrificial layer 406 is patterned with annulus shapes to form a shell of a microbump.
  • the sacrificial layer 406 is a photoresist layer and patterning is accomplished by exposing the photoresist through a mask and developing the photoresist.
  • FIG. 4B is a cross-sectional view illustrating an exemplary layer structure after depositing a microbump shell according to one embodiment.
  • a shell 408 is deposited to form an annular ring in the sacrificial layer 406 .
  • the shell 408 is deposited through electroless deposition of copper.
  • FIG. 4C is a cross-sectional view illustrating an exemplary layer structure after selective removal of the sacrificial layer according to one embodiment.
  • An opening 410 is formed inside the shell 408 by selectively removing the sacrificial layer 406 .
  • FIG. 4D is a cross-sectional view illustrating an exemplary layer structure after seed layer deposition according to one embodiment.
  • a seed, layer 412 is deposited on the sacrificial layer 406 , the shell 408 , and the BEOL layer 404 .
  • the seed layer 412 is a Ti/Cu bilayer deposited through PVD.
  • FIG. 4E is a cross-sectional view illustrating an exemplary layer structure after seed layer etching according to one embodiment.
  • the seed layer 412 is etched to remove the seed layer 412 from regions outside the opening 410 .
  • RIE is performed to remove the seed layer 412 .
  • FIG. 4F is a cross-sectional view illustrating an exemplary layer structure after deposition of solder according to one embodiment.
  • a solder 414 is deposited in the opening 410 .
  • the solder 414 is electrodeposited in the opening 410 using the seed layer 412 as an electrode.
  • the solder 414 may be, for example, a tin-silver alloy.
  • microbumps may be constructed with smaller diameters and smaller pitches allowing increased, connection densities between two dies or between a die and a substrate.
  • FIG. 6 is a block diagram showing an exemplary wireless communication system 600 in which an embodiment of the disclosure may be advantageously employed.
  • FIG. 6 shows three remote units 620 , 630 , and 650 and two base stations 640 .
  • Remote units 620 , 630 , and 650 include IC devices 625 A, 625 C and 625 B, that include the disclosed microbump structure.
  • any device containing an IC may also include the microbump structure disclosed here, including the base stations, switching devices, and network equipment.
  • FIG. 6 shows forward link signals 680 from the base station 640 to the remote units 620 , 630 , and 650 and reverse link signals 690 from the remote units 620 , 630 , and 650 to base stations 640 .
  • remote unit 620 is shown as a mobile telephone
  • remote unit 630 is shown as a portable computer
  • remote unit 650 is shown as a fixed, location remote unit in a wireless local loop system.
  • the remote units may be mobile phones, hand-held, personal communication systems (PCS) units, portable data units such as personal data assistants, GPS enabled devices, navigation devices, set top boxes, music players, video players, entertainment units, fixed location data units such as meter reading equipment, or any other device that stores or retrieves data or computer instructions, or any combination thereof.
  • FIG. 6 illustrates remote units according to the teachings of the disclosure, the disclosure is not limited to these exemplary illustrated units. Embodiments of the disclosure may be suitably employed in any device which includes packaged integrated circuits having microbumps.
  • FIG. 7 is a block diagram illustrating a design workstation used for circuit, layout, and logic design of a semiconductor component, such as a microbump as disclosed above.
  • a design workstation 700 includes a hard disk 701 containing operating system software, support files, and design software such as Cadence or OrCAD.
  • the design workstation 700 also includes a display to facilitate design of a circuit 710 or a semiconductor component 712 such as a packaged, integrated circuit having microbumps.
  • a storage medium 704 is provided for tangibly storing the circuit design 710 or the semiconductor component 712 .
  • the circuit design 710 or the semiconductor component 712 may be stored on the storage medium 704 in a file format such as GDSII or GERBER.
  • the storage medium 704 may be a CD-ROM. DVD, hard disk, flash memory, or other appropriate device.
  • the design workstation 700 includes a drive apparatus 703 for accepting input from or writing output to the storage medium 704 .
  • Data recorded on the storage medium 704 may specify logic circuit configurations, pattern data for photolithography masks, or mask pattern data for serial write tools such as electron beam lithography.
  • the data may further include logic verification data such as timing diagrams or net circuits associated with logic simulations.
  • Providing data on the storage medium 704 facilitates the design of the circuit design 710 or the semiconductor component 712 by decreasing the number of processes for designing semiconductor wafers.
  • the methodologies may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein.
  • Any machine-readable medium tangibly embodying instructions may be used, in implementing the methodologies described herein.
  • software codes may be stored in a memory and executed by a processor unit.
  • Memory may be implemented within the processor unit or external to the processor unit.
  • the term “memory” refers to any type of long term, short term, volatile, nonvolatile, or other memory and is not to be limited to any particular type of memory or number of memories, or type of media upon which memory is stored.
  • the functions may be stored as one or more instructions or code on a computer-readable medium. Examples include computer-readable media encoded with a data structure and computer-readable media encoded with a computer program.
  • Computer-readable media includes physical computer storage media, A storage medium may be any available medium that can be accessed by a computer.
  • such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer; disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • instructions and/or data may be provided as signals on transmission media included in a communication apparatus.
  • a communication apparatus may include a transceiver having signals indicative of instructions and data. The instructions and data are configured to cause one or more processors to implement the functions outlined in the claims.

Abstract

Electromigration in microbump connections causes voids in the microbumps, which reduces the lifetime of an integrated circuit containing the microbump, Electromigration lifetime may be increased in microbumps by forming a copper shell around the solder. The copper shell of one microbump contacts the copper shell of a second microbump to enclose the solder of the microbump connection. The copper shell allows higher current densities through the microbump. Thus, smaller microbumps may be manufactured on a smaller pitch without suffering failure from electromigration. Additionally, the copper shell reduces shorting or bridging between microbump connections on a substrate.

Description

    CROSS REFERENCE TO RELATED APPLICATION
  • This application is a divisional of co-pending U.S. patent application Ser. No. 12/837,717 filed Jul. 16, 2010, entitled “CONDUCTIVE SIDEWALL FOR MICROBUMPS.”
  • TECHNICAL FIELD
  • The present disclosure generally relates to integrated circuits.
  • More specifically, the present disclosure relates to packaging integrated circuits.
  • BACKGROUND
  • Microbumps are small diameter solder connections between a first die and a second die or between a die and a packaging substrate. The small diameter of the microbumps allows high density connections to the die, however, the high density may result in shorting or bridging between connections.
  • FIG. 1 is a cross-sectional view of two substrates connected through conventional microbumps. A first substrate 110 having copper pillars 112 faces a second substrate 120 having copper pillars 122. A solder 130 connects pillars of the copper pillars 112 with pillars of the copper pillars 122. The combination of the copper pillars 122 and the solder 130 is a microbump. When the pitch between the copper pillars 112, 122 is too small, bridging or shorting may occur such as, for example, in a region 132.
  • The small diameter of microbumps also increases the current density through the microbumps. Increases in current density cause electromigration in the microbumps. Electromigration is the movement of metal atoms resulting from momentum transfer by electrons to the metal atoms. Electromigration causes voids in the microbumps, which reduces reliability of the connections and leads to failure of integrated circuits containing the microbumps.
  • Microbumps are conventionally made from solder materials such as tin and silver, which suffer from electromigration. Copper reduces electromigration effects, but is too rigid for reliable assembly or operation in integrated circuits.
  • Thus, there is a need for a microbump structure with improved electromigration performance.
  • BRIEF SUMMARY
  • According to one embodiment, a method includes forming an opening in a sacrificial layer on a contact pad of a substrate. The method also includes depositing a first conductive layer covering sidewalk of the opening and the bottom of the opening. The method further includes depositing a second conductive layer inside the first conductive layer, the second conductive layer having a lower melting point than the first conductive layer.
  • According to another embodiment, a method includes selecting a first substrate with microbumps having a first conductive material and a second conductive material substantially contained within the first conductive material. The method also includes selecting a second substrate with microbumps having a first conductive material and a second conductive material substantially contained within the first conductive material. The method further includes aligning microbumps of the first substrate with microbumps of the second substrate. The method also includes forming a bond between microbumps of the first substrate and microbumps of the second substrate such that the second, conductive material is substantially contained inside the first conductive material and the first conductive material of the microbumps of the first substrate contacts with the first conductive material of the microbumps of the second substrate.
  • According to yet another embodiment, an apparatus includes a first substrate coupled to a second substrate. The apparatus also includes a packaging connection coupling the first substrate to the second substrate. The packaging connection has a shell of first conductive material around a second conductive material. The first conductive material has a higher melting point than the second conductive material.
  • According to a further embodiment, an apparatus includes an outer shell connecting means for reducing electromigration. The outer shell connecting means communicates with a first substrate and is capable of connecting with an outer shell connecting means of a second substrate. The apparatus also includes a solder connecting means of the first substrate for connecting with a solder connecting means of the second, substrate. The solder connecting means of the first substrate resides within the outer shell connecting means of the first substrate.
  • This has outlined, rather broadly, the features and technical advantages of the present disclosure in order that the detailed description that follows may be better understood. Additional features and advantages of the disclosure will be described below. It should be appreciated by those skilled in the art that this disclosure may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. It should, also be realized, by those skilled in the art that such equivalent constructions do not depart from the teachings of the disclosure as set forth in the appended, claims. The novel features, which are believed to be characteristic of the disclosure, both as to its organization and method of operation, together with further objects and advantages, will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided, for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • For a more complete understanding of the present disclosure, reference is now made to the following description taken in conjunction with the accompanying drawings.
  • FIG. 1 is a cross-sectional view of two substrates connected through conventional microbumps.
  • FIG. 2A-2J are cross-sectional views of a layer structure for manufacturing microbumps according to one embodiment.
  • FIG. 3 is a flow chart illustrating an exemplary process for manufacturing microbumps according to one embodiment.
  • FIGS. 4A-4F are cross-sectional views illustrating an exemplary layer structure for a microbump according to one embodiment.
  • FIG. 5 is a flow chart illustrating an exemplary method for forming the microbump with shell according to one embodiment.
  • FIG. 6 is a block diagram showing an exemplary wireless communication system in which an embodiment of the disclosure may be advantageously employed.
  • FIG. 7 is a block diagram illustrating a design workstation used for circuit, layout, and logic design of a semiconductor component according to one embodiment.
  • DETAILED DESCRIPTION
  • According to one embodiment, a copper sidewall is constructed around a solder microbump to improve reliability of the microbump connections. The solder provides flexibility during assembly, and the copper reduces electromigration. Additionally, a copper sidewall prevents lateral migration of the solder, reducing bridges and shorts between microbumps.
  • FIGS. 2A-2J are cross-sectional views of a layer structure for manufacturing microbumps according to one embodiment. A flow chart illustrating an exemplary process for manufacturing microbumps according to one embodiment is shown in FIG. 3 and will be presented, with FIGS. 2A-2J. A flow chart 300 begins at block 310 with depositing an underbump metal (UBM) layer. FIG. 2A is a cross-sectional view illustrating an exemplary layer structure after depositing a UBM according to one embodiment. A substrate 202 includes back-end-of-line (BEOL) layers 204. The substrate 202 may be a semiconductor material or an organic material. A passivation layer 206 is deposited on the BEOL layers 204 followed by a UBM layer 208. An opening in the passivation layer 206 may correspond to a contact pad for coupling the BEOL layers 204 to a microbump. According to one embodiment, the UBM layer 208 is conformally deposited over the passivation layer 206 and the BEOL layers 204.
  • At block 315 a sacrificial layer is deposited on the UBM layer. FIG. 2B is a cross-sectional view illustrating an exemplary layer structure after deposition of a sacrificial layer according to one embodiment. A sacrificial layer 210 is deposited on the UBM layer 208. The sacrificial layer 210 may be a photoresist layer.
  • At block 320 the sacrificial layer is patterned and at block 325 a seed layer is deposited. FIG. 2C is a cross-sectional view illustrating an exemplary layer structure after patterning of the sacrificial layer and depositing a seed layer according to one embodiment. An opening 250 is patterned in the sacrificial layer 210. According to one embodiment, the opening 250 corresponds with a contact pad in the BEOL layers 204 and an opening in the passivation layer 206. A seed layer 212 is deposited on the sacrificial layer 210 and the UBM layer 208. According to one embodiment, the seed layer 212 is a titanium and copper bilaver deposited through physical vapor deposition (PVD).
  • At block 330 the seed layer is etched from the sacrificial layer. FIG. 2D is a cross-sectional view illustrating an exemplary layer structure after patterning of the seed layer according to one embodiment. The seed layer 212 is removed from the top of the sacrificial layer 210. According to one embodiment, a reactive ion etch (RIE) patterns the seed layer 212. During RIE, ions bombard the surface of the seed layer 212 and have a trajectory normal to the surface of the top surface of the seed layer 212. During RIE etching, the seed layer 212 may be removed from the top of the sacrificial layer 210 while remaining on sidewalls of the opening 250.
  • At block 335 a shell is deposited in the opening 250. FIG. 2E is a cross-sectional view illustrating an exemplary layer structure after depositing a copper shell according to one embodiment. A conductive shell 220 is deposited in the opening 250. According to one embodiment, the shell 220 is electrodeposited by immersing the seed layer 212 in a copper electrolyte while applying a voltage to the seed layer 212. According to another embodiment, the shell 220 is nickel deposited by electroplating. The electrodeposition may be conformal resulting in a shape of the conductive shell 220 correlating with the opening 250. According to one embodiment, the copper electrolyte may include additives such as accelerators, directional controls, and inhibitors to achieve suitable conformality of the opening 250.
  • At block 340 solder is deposited in the shell. FIG. 2F is a cross-sectional view illustrating an exemplary layer structure after depositing solder according to one embodiment. A solder 222 is deposited in the shell 220. According to one embodiment, the solder 222 is a tin-silver alloy electroplated in the shell 220.
  • At block 345 the sacrificial layer is stripped. FIG. 2G is a cross-sectional view illustrating an exemplary layer structure after stripping the sacrificial layer according to one embodiment. The sacrificial layer 210 is removed. According to one embodiment, the sacrificial layer 210 is removed through a wet chemical etch.
  • At block 350 the solder is reflowed. FIG. 2H is a cross-sectional view illustrating an exemplary layer structure after solder reflow according to one embodiment. The solder 222 is reflowed by applying a high temperature to the solder 222 during which the solder 222 forms a ball or rounded surface. According to one embodiment, the shell 220 has a melting temperature higher than the solder 222 such that the shell 220 does not reflow during reflow of the solder 222.
  • At block 355 the substrate 202, which may be a die, is picked and placed to align with a second die. FIG. 21 is a cross-sectional view illustrating two exemplary substrates after pick and place according to one embodiment. A second substrate 230 having solder 232 is aligned to the solder 222 of the substrate 202. According to one embodiment, the substrate 230 has a symmetric structure around the solder 232 corresponding to the structure around the solder 222 on the substrate 202. According to another embodiment, the solder 232 on the substrate 230 may have an asymmetric shape to the solder 222 on the substrate 202.
  • At block 360 solder is bonded between two substrates, such as a first die to a second, die or a die to a packaging substrate. FIG. 21 is a cross-sectional view illustrating two exemplary bonded substrates according to one embodiment. The solder 222 and the solder 232 are bonded together. According to one embodiment, thermo compression bonding is performed to make contact between the conductive shell 220 of the substrate 202 and a conductive shell 234 of the substrate 230. During compression bonding, some solder beading may occur as the solder 222 beads outside the conductive shell 220 and the conductive shell 234. According to one embodiment, the conductive shell 234 is 1-5 micrometers in thickness, and the solder 232 is 5-20 micrometers in diameter.
  • According to another embodiment, the shell of the microbump may be deposited through electrodeposition techniques such as, for example, electroless deposition. FIGS. 4A-4F are cross-sectional views illustrating an exemplary layer structure for a microbump according to one embodiment. FIG. 5 is a flow chart illustrating an exemplary method for forming the microbump with shell according to this embodiment.
  • A flow chart 500 begins at block 505 with depositing an underbump metal (not shown in FIG. 4A). The flow chart continues to block 510 with patterning a sacrificial layer. FIG. 4A is a cross-sectional view illustrating an exemplary layer structure after patterning a sacrificial layer according to one embodiment. A sacrificial layer 406 is deposited on a BEOL layer 404 on a substrate 402. The sacrificial layer 406 is patterned with annulus shapes to form a shell of a microbump. According to one embodiment, the sacrificial layer 406 is a photoresist layer and patterning is accomplished by exposing the photoresist through a mask and developing the photoresist.
  • At block 515 a shell is deposited in the patterned openings of the sacrificial layer. FIG. 4B is a cross-sectional view illustrating an exemplary layer structure after depositing a microbump shell according to one embodiment. A shell 408 is deposited to form an annular ring in the sacrificial layer 406. According to one embodiment, the shell 408 is deposited through electroless deposition of copper.
  • At block 520 the sacrificial layer is selectively removed to expose the inner region of the annulus formed, in the sacrificial layer. FIG. 4C is a cross-sectional view illustrating an exemplary layer structure after selective removal of the sacrificial layer according to one embodiment. An opening 410 is formed inside the shell 408 by selectively removing the sacrificial layer 406.
  • At block 525 a seed layer is deposited. FIG. 4D is a cross-sectional view illustrating an exemplary layer structure after seed layer deposition according to one embodiment. A seed, layer 412 is deposited on the sacrificial layer 406, the shell 408, and the BEOL layer 404. According to one embodiment the seed layer 412 is a Ti/Cu bilayer deposited through PVD.
  • At block 530 the seed layer is etched. FIG. 4E is a cross-sectional view illustrating an exemplary layer structure after seed layer etching according to one embodiment. The seed layer 412 is etched to remove the seed layer 412 from regions outside the opening 410. According to one embodiment, RIE is performed to remove the seed layer 412.
  • At block 535 solder is deposited in the shell. FIG. 4F is a cross-sectional view illustrating an exemplary layer structure after deposition of solder according to one embodiment. A solder 414 is deposited in the opening 410. According to one embodiment, the solder 414 is electrodeposited in the opening 410 using the seed layer 412 as an electrode. The solder 414 may be, for example, a tin-silver alloy.
  • Copper sidewalk placed around solder microbump joints reduce the effects of electromigration and reduce occurrences of bridging and shorting between microbumps. Thus, microbumps may be constructed with smaller diameters and smaller pitches allowing increased, connection densities between two dies or between a die and a substrate.
  • FIG. 6 is a block diagram showing an exemplary wireless communication system 600 in which an embodiment of the disclosure may be advantageously employed. For purposes of illustration, FIG. 6 shows three remote units 620, 630, and 650 and two base stations 640. It will be recognized that wireless communication systems may have many more remote units and base stations. Remote units 620, 630, and 650 include IC devices 625A, 625C and 625B, that include the disclosed microbump structure. It will be recognized that any device containing an IC may also include the microbump structure disclosed here, including the base stations, switching devices, and network equipment. FIG. 6 shows forward link signals 680 from the base station 640 to the remote units 620, 630, and 650 and reverse link signals 690 from the remote units 620, 630, and 650 to base stations 640.
  • In FIG. 6, remote unit 620 is shown as a mobile telephone, remote unit 630 is shown as a portable computer, and remote unit 650 is shown as a fixed, location remote unit in a wireless local loop system. For example, the remote units may be mobile phones, hand-held, personal communication systems (PCS) units, portable data units such as personal data assistants, GPS enabled devices, navigation devices, set top boxes, music players, video players, entertainment units, fixed location data units such as meter reading equipment, or any other device that stores or retrieves data or computer instructions, or any combination thereof. Although FIG. 6 illustrates remote units according to the teachings of the disclosure, the disclosure is not limited to these exemplary illustrated units. Embodiments of the disclosure may be suitably employed in any device which includes packaged integrated circuits having microbumps.
  • FIG. 7 is a block diagram illustrating a design workstation used for circuit, layout, and logic design of a semiconductor component, such as a microbump as disclosed above. A design workstation 700 includes a hard disk 701 containing operating system software, support files, and design software such as Cadence or OrCAD. The design workstation 700 also includes a display to facilitate design of a circuit 710 or a semiconductor component 712 such as a packaged, integrated circuit having microbumps. A storage medium 704 is provided for tangibly storing the circuit design 710 or the semiconductor component 712. The circuit design 710 or the semiconductor component 712 may be stored on the storage medium 704 in a file format such as GDSII or GERBER. The storage medium 704 may be a CD-ROM. DVD, hard disk, flash memory, or other appropriate device. Furthermore, the design workstation 700 includes a drive apparatus 703 for accepting input from or writing output to the storage medium 704.
  • Data recorded on the storage medium 704 may specify logic circuit configurations, pattern data for photolithography masks, or mask pattern data for serial write tools such as electron beam lithography. The data may further include logic verification data such as timing diagrams or net circuits associated with logic simulations. Providing data on the storage medium 704 facilitates the design of the circuit design 710 or the semiconductor component 712 by decreasing the number of processes for designing semiconductor wafers.
  • For a firmware and/or software implementation, the methodologies may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. Any machine-readable medium tangibly embodying instructions may be used, in implementing the methodologies described herein. For example, software codes may be stored in a memory and executed by a processor unit. Memory may be implemented within the processor unit or external to the processor unit. As used herein the term “memory” refers to any type of long term, short term, volatile, nonvolatile, or other memory and is not to be limited to any particular type of memory or number of memories, or type of media upon which memory is stored.
  • If implemented, in firmware and/or software, the functions may be stored as one or more instructions or code on a computer-readable medium. Examples include computer-readable media encoded with a data structure and computer-readable media encoded with a computer program. Computer-readable media includes physical computer storage media, A storage medium may be any available medium that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer; disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • In addition to storage on computer readable medium, instructions and/or data may be provided as signals on transmission media included in a communication apparatus. For example, a communication apparatus may include a transceiver having signals indicative of instructions and data. The instructions and data are configured to cause one or more processors to implement the functions outlined in the claims.
  • Although specific circuitry has been set forth, it will be appreciated by those skilled in the art that not all of the disclosed circuitry is required to practice the disclosure. Moreover, certain well known circuits have not been described, to maintain focus on the disclosure.
  • Although the present disclosure and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the technology of the disclosure as defined, by the appended, claims. For example, relational terms, such as “above” and “below” are used with respect to a substrate or electronic device. Of course, if the substrate or electronic device is inverted, above becomes below, and vice versa. Additionally, if oriented sideways, above and below may refer to sides of a substrate or electronic device. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present disclosure. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

Claims (14)

What is claimed is:
1. A method, comprising:
forming an opening in a sacrificial layer on a contact pad of a substrate;
depositing a first conductive layer covering sidewalls of the opening and a bottom of the opening; and
depositing a second conductive layer inside the first conductive layer, the second conductive layer having a lower melting point than the first conductive layer.
2. The method of claim 1, in which depositing the first conductive layer comprises electroplating copper and/or nickel.
3. The method of claim 1, in which depositing the second conductive layer comprises electroplating tin and/or silver.
4. The method of claim 1, further comprising depositing an underbump metal (UBM) layer on the contact pad before depositing the first conductive layer, the first conductive layer partially covering a surface of the UBM layer.
5. The method of claim 4, further comprising depositing a passivation layer on the substrate, prior to depositing the UBM layer.
6. The method of claim 1, in which forming the opening comprises: patterning the sacrificial layer;
depositing a seed layer; and
etching back the seed layer.
7. The method, of claim 6, in which the seed layer comprises titanium and/or copper.
8. The method of claim 1, further comprising heating the second conductive layer while not reflowing the first conductive layer.
9. The method of claim 1, further comprising bonding the second conductive material to a third conductive material of another substrate.
10. The method, of claim 1, further comprising integrating the substrate into a mobile phone, a set top box, a music player, a video player, an entertainment unit, a navigation device, a computer, a hand-held personal communication systems (PCS) unit, a portable data unit, and/or a fixed location data unit.
11. A method, comprising:
selecting a first substrate with a first plurality of microbumps having a first conductive material and a second conductive material substantially contained within the first conductive material;
selecting a second substrate with a second plurality of microbumps having a first conductive material and a second conductive material substantially contained within the first conductive material;
aligning microbumps of the first plurality of microbumps with microbumps of the second plurality of microbumps; and
forming a bond between microbumps of the first plurality of microbumps and microbumps of the second plurality of microbumps such that the first conductive material of the first plurality of microbumps contacts the first conductive material of the second plurality of microbumps.
12. The method of claim 11, in which forming the bond, comprises forming a thermo compression bond.
13. The method of claim 11, in which the selected second substrate is symmetric with the selected first substrate.
14. The method of claim 11, further comprising integrating the first and second substrates into a mobile phone, a set top box, a music player, a video player, an entertainment unit, a navigation device, a computer, a hand-held personal communication systems (PCS) unit, a portable data unit, and/or a fixed location data unit.
US13/713,822 2010-07-16 2012-12-13 Conductive sidewall for microbumps Abandoned US20130105559A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/713,822 US20130105559A1 (en) 2010-07-16 2012-12-13 Conductive sidewall for microbumps

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/837,717 US8482125B2 (en) 2010-07-16 2010-07-16 Conductive sidewall for microbumps
US13/713,822 US20130105559A1 (en) 2010-07-16 2012-12-13 Conductive sidewall for microbumps

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US12/837,717 Division US8482125B2 (en) 2010-07-16 2010-07-16 Conductive sidewall for microbumps

Publications (1)

Publication Number Publication Date
US20130105559A1 true US20130105559A1 (en) 2013-05-02

Family

ID=44533097

Family Applications (2)

Application Number Title Priority Date Filing Date
US12/837,717 Expired - Fee Related US8482125B2 (en) 2010-07-16 2010-07-16 Conductive sidewall for microbumps
US13/713,822 Abandoned US20130105559A1 (en) 2010-07-16 2012-12-13 Conductive sidewall for microbumps

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US12/837,717 Expired - Fee Related US8482125B2 (en) 2010-07-16 2010-07-16 Conductive sidewall for microbumps

Country Status (3)

Country Link
US (2) US8482125B2 (en)
TW (1) TW201236091A (en)
WO (1) WO2012009520A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8835301B2 (en) * 2011-02-28 2014-09-16 Stats Chippac, Ltd. Semiconductor device and method of forming bump structure with insulating buffer layer to reduce stress on semiconductor wafer
WO2014136733A1 (en) * 2013-03-04 2014-09-12 新日鐵住金株式会社 Impact-absorbing component
US10483221B2 (en) 2017-10-30 2019-11-19 Micron Technology, Inc. 3DI solder cup
US11875988B2 (en) * 2021-04-29 2024-01-16 Nxp Usa, Inc. Substrate pad and die pillar design modifications to enable extreme fine pitch flip chip (FC) joints

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5644586A (en) * 1994-09-16 1997-07-01 Mitsubishi Denki Kabushiki Kaisha Semiconductor laser device and method of fabricating semiconductor laser device
US6043429A (en) * 1997-05-08 2000-03-28 Advanced Micro Devices, Inc. Method of making flip chip packages
US20010013655A1 (en) * 1999-05-04 2001-08-16 Smith John W. Methods of making microelectronic connections with liquid conductive elements
US6534863B2 (en) * 2001-02-09 2003-03-18 International Business Machines Corporation Common ball-limiting metallurgy for I/O sites
US6884313B2 (en) * 2001-01-08 2005-04-26 Fujitsu Limited Method and system for joining and an ultra-high density interconnect
US7112522B1 (en) * 2005-11-08 2006-09-26 Taiwan Semiconductor Manufacturing Co., Ltd. Method to increase bump height and achieve robust bump structure
US20070108619A1 (en) * 2005-11-15 2007-05-17 Hsu Jun C Bonding pad with high bonding strength to solder ball and bump
US20110039370A1 (en) * 2005-07-21 2011-02-17 Shinko Electric Industries Co., Ltd. Electronic parts packaging structure and method of manufacturing the same
US20110101518A1 (en) * 2009-11-02 2011-05-05 Stats Chippac, Ltd. Semiconductor Device and Method of Forming Column Interconnect Structure to Reduce Wafer Stress
US8405199B2 (en) * 2010-07-08 2013-03-26 Taiwan Semiconductor Manufacturing Company, Ltd. Conductive pillar for semiconductor substrate and method of manufacture

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6077725A (en) 1992-09-03 2000-06-20 Lucent Technologies Inc Method for assembling multichip modules
US6224690B1 (en) 1995-12-22 2001-05-01 International Business Machines Corporation Flip-Chip interconnections using lead-free solders
US5986348A (en) 1999-03-15 1999-11-16 Ball Semiconductor Inc. Magnetic alignment system for bumps on an integrated circuit device
US6930032B2 (en) 2002-05-14 2005-08-16 Freescale Semiconductor, Inc. Under bump metallurgy structural design for high reliability bumped packages
DE10355508B4 (en) 2003-11-27 2006-07-06 Infineon Technologies Ag Ultra-thin semiconductor circuit with contact bumps and associated manufacturing method
WO2005093816A1 (en) 2004-03-05 2005-10-06 Infineon Technologies Ag Semiconductor device for radio frequency applications and method for making the same
JP4722532B2 (en) 2005-04-07 2011-07-13 シャープ株式会社 SEMICONDUCTOR DEVICE, ELECTRONIC DEVICE, AND METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE
US7449785B2 (en) 2006-02-06 2008-11-11 Taiwan Semiconductor Manufacturing Co., Ltd. Solder bump on a semiconductor substrate
TWI299896B (en) 2006-03-16 2008-08-11 Advanced Semiconductor Eng Method for forming metal bumps
US7375021B2 (en) 2006-04-04 2008-05-20 International Business Machines Corporation Method and structure for eliminating aluminum terminal pad material in semiconductor devices
KR20090059504A (en) 2007-12-06 2009-06-11 삼성전자주식회사 Semiconductor device and methods for fabricating the same
EP2075834A1 (en) 2007-12-28 2009-07-01 INTERUNIVERSITAIR MICROELEKTRONICA CENTRUM vzw (IMEC) Solder bumps for flip chip bonding with higher density
US8368214B2 (en) 2008-12-09 2013-02-05 Marvell World Trade Ltd. Alpha shielding techniques and configurations
US20110210443A1 (en) 2010-02-26 2011-09-01 Xilinx, Inc. Semiconductor device having bucket-shaped under-bump metallization and method of forming same

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5644586A (en) * 1994-09-16 1997-07-01 Mitsubishi Denki Kabushiki Kaisha Semiconductor laser device and method of fabricating semiconductor laser device
US6043429A (en) * 1997-05-08 2000-03-28 Advanced Micro Devices, Inc. Method of making flip chip packages
US20010013655A1 (en) * 1999-05-04 2001-08-16 Smith John W. Methods of making microelectronic connections with liquid conductive elements
US6884313B2 (en) * 2001-01-08 2005-04-26 Fujitsu Limited Method and system for joining and an ultra-high density interconnect
US6534863B2 (en) * 2001-02-09 2003-03-18 International Business Machines Corporation Common ball-limiting metallurgy for I/O sites
US20110039370A1 (en) * 2005-07-21 2011-02-17 Shinko Electric Industries Co., Ltd. Electronic parts packaging structure and method of manufacturing the same
US7112522B1 (en) * 2005-11-08 2006-09-26 Taiwan Semiconductor Manufacturing Co., Ltd. Method to increase bump height and achieve robust bump structure
US20070108619A1 (en) * 2005-11-15 2007-05-17 Hsu Jun C Bonding pad with high bonding strength to solder ball and bump
US20110101518A1 (en) * 2009-11-02 2011-05-05 Stats Chippac, Ltd. Semiconductor Device and Method of Forming Column Interconnect Structure to Reduce Wafer Stress
US8405199B2 (en) * 2010-07-08 2013-03-26 Taiwan Semiconductor Manufacturing Company, Ltd. Conductive pillar for semiconductor substrate and method of manufacture

Also Published As

Publication number Publication date
WO2012009520A3 (en) 2012-06-21
US20120012998A1 (en) 2012-01-19
US8482125B2 (en) 2013-07-09
WO2012009520A9 (en) 2012-11-01
TW201236091A (en) 2012-09-01
WO2012009520A2 (en) 2012-01-19

Similar Documents

Publication Publication Date Title
CN109216314A (en) Embedded bridge with through silicon via
JP2016533651A (en) Method of embedding WLCSP components in e-WLB and e-PLB
JP2005217419A (en) Integrated circuit inductor of high q factor (q value)
KR101446735B1 (en) Systems and methods providing arrangements of vias
US9299660B2 (en) Controlled solder-on-die integrations on packages and methods of assembling same
US20130105559A1 (en) Conductive sidewall for microbumps
KR100713121B1 (en) Chip and a chip stack using the same and a method for manufacturing the same
JP6113130B2 (en) Selective seed layer processing for feature plating
US11380613B2 (en) Repurposed seed layer for high frequency noise control and electrostatic discharge connection
EP2915191B1 (en) Method of fabricating a conductive interconnect with an inorganic collar
CN109564897B (en) Nickel-tin micro-bump structure and manufacturing method thereof
JP2015079995A (en) Surface preparation of die for improved bonding strength
US20150221528A9 (en) Process for improving package warpage and connection reliability through use of a backside mold configuration (bsmc)
KR20190026993A (en) Ultra-thin thickness printed circuit board capable of recess height control and method of manufacturing the same
CN114171505A (en) Multi-layer stacked high-broadband memory packaging structure and packaging method
JP5172577B2 (en) Manufacturing method of semiconductor device
US11310911B2 (en) Three-dimensional (3D) integrated circuit (IC) integration of an embedded chip and a preformed metal routing structure
US11342246B2 (en) Multi-terminal integrated passive devices embedded on die and a method for fabricating the multi-terminal integrated passive devices
TW202308085A (en) Sidewall wetting barrier for conductive pillars
CN112599492A (en) Thick adapter plate structure and manufacturing method thereof
KR101264349B1 (en) Method for fabricating solder bump for semiconductor packaging

Legal Events

Date Code Title Description
AS Assignment

Owner name: QUALCOMM INCORPORATED, CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHANDRASEKARAN, ARVIND;GU, SHIQUN;HAU-RIEGE, CHRISTINE S.;REEL/FRAME:029961/0184

Effective date: 20100715

Owner name: QUALCOMM INCORPORATED, CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHANDRASEKARAN, ARVIND;GU, SHIQUN;HAU-RIEGE, CHRISTINE S.;REEL/FRAME:029961/0112

Effective date: 20100715

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION