DE10339702A1 - Method for simultaneous forming of different gate regions of FET structure, starting with silicon substrate with two FET regions and simultaneous formation of stray layer over both FET regions - Google Patents
Method for simultaneous forming of different gate regions of FET structure, starting with silicon substrate with two FET regions and simultaneous formation of stray layer over both FET regions Download PDFInfo
- Publication number
- DE10339702A1 DE10339702A1 DE2003139702 DE10339702A DE10339702A1 DE 10339702 A1 DE10339702 A1 DE 10339702A1 DE 2003139702 DE2003139702 DE 2003139702 DE 10339702 A DE10339702 A DE 10339702A DE 10339702 A1 DE10339702 A1 DE 10339702A1
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- Germany
- Prior art keywords
- transistor
- transistor region
- profile
- well
- gate dielectric
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture 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
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/823493—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of the wells or tubs, e.g. twin tubs, high energy well implants, buried implanted layers for lateral isolation [BILLI]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture 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
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/823462—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of the gate insulating layers, e.g. different gate insulating layer thicknesses, particular gate insulator materials or particular gate insulator implants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture 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
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/8238—Complementary field-effect transistors, e.g. CMOS
- H01L21/823857—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the gate insulating layers, e.g. different gate insulating layer thicknesses, particular gate insulator materials or particular gate insulator implants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture 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
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/8238—Complementary field-effect transistors, e.g. CMOS
- H01L21/823892—Complementary field-effect transistors, e.g. CMOS with a particular manufacturing method of the wells or tubs, e.g. twin tubs, high energy well implants, buried implanted layers for lateral isolation [BILLI]
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zur gemeinsamen Herstellung von unterschiedlichen Gatebereichen für eine Transistorstruktur.The The present invention relates to a method of co-production of different gate regions for a transistor structure.
In
In
einem ersten Verfahrensschritt wird gleichzeitig über dem
ersten Transistorbereich A und über
dem zweiten Transistorbereich B eine Streuschicht
Im
Anschluss daran wird eine erste Implantation I von ersten Fremd-Ionen,
z.B. Bor oder Phosphor, durch die Streuschicht
Im
Anschluss daran erfolgt ein gleichzeitiges Durchführen einer
zweiten Implantation I' von
zweiten Fremd-Ionen, z.B. Bor oder Phosphor, durch die Streuschicht
In
einem anschließenden
Verfahrensschritt erfolgt ein Tempern der resultierenden Struktur
zur Ausbildung einer jeweiligen ersten Transistorwanne mit einem
ersten Wannenprofil P aus den ersten Fremd-Ionen und einer jeweiligen
zweiten Transistorwanne mit einem zweiten Wannenprofil P' aus den zweiten
Fremd-Ionen. Die Tiefenerstreckung der ersten Transistorwannen ist
durch die strichpunktierte Linie in
Danach
wird die Streuschicht
Danach
wird beispielsweise unter Verwendung einer entsprechenden Photomaske
mittels eines Nassätzprozesses
die erste Gatedielektrikumsschicht
Auch
diese zweite Gatedielektrikumsschicht
Als Resultat erhält man in den Transistorbereichen A, B unterschiedliche Gatebereiche, welche verschiedene Dicken aufweisen.When Result receives in the transistor regions A, B, different gate regions, which have different thicknesses.
Die
sich an
Als
nachteilhaft bei dem bekannten Verfahren hat sich die Tatsache herausgestellt,
dass sich insbesondere das Wannenprofil P' durch die beiden thermischen Oxidationsprozesse
verändert.
Dabei erfolgt eine Umverteilung der Dotierstoffe und eine Ausdiffusion
von Dotierstoffen in das jeweilige Gatedielektrikum. Im Transistorbereich
B geht der in das erste Gatedielektrikum
Die besagten Effekte vermindern die Funktionstüchtigkeit der entsprechenden Transistorvorrichtungen und verhindern eine Herstellung von retrograden Wannenprofilen. Insbesondere für Transistoren mit vergrabenem Kanal hat sich das als besonders nachteilhaft herausgestellt.The said effects reduce the functionality of the corresponding ones Transistor devices and prevent the production of retrograde When profiles. Especially for This buried channel transistor has been found to be particularly disadvantageous exposed.
Daher ist es Aufgabe der vorliegenden Erfindung, ein verbessertes Verfahren zur gemeinsamen Herstellung von unterschiedlichen Gatebereichen für eine Transistorstruktur zu schaffen, welches eine geringere Degradierung der Transistorprofile aufweist.It is therefore an object of the present invention to provide an improved method for the joint production of different gate regions for a transistor structure, which has a ge has lower degradation of the transistor profiles.
Erfindungsgemäß wird dieses Problem durch das in Anspruch 1 angegebene gemeinsamen Herstellung von unterschiedlichen Gatebereichensverfahren gelöst.According to the invention this Problem by the common preparation specified in claim 1 solved by different gate area method.
Die der vorliegenden Erfindung zugrunde liegende Idee besteht darin, dass die Streuschicht lediglich für die erste Implantation verwendet wird, wohingegen für die zweite Implantation ein bereits aufgebrachtes Gatedielektrikum im jeweiligen Transistorbereich als Streuschicht verwendet wird. Somit kann das thermische Budget, das die Transistorwannen vorsehen, erheblich vermindert werden.The The idea underlying the present invention is that that the litter layer is used only for the first implantation whereas, for the second implantation an already applied gate dielectric is used in the respective transistor area as a scattering layer. Thus, the thermal budget that the transistor tubs provide can be significantly reduced.
In den Unteransprüchen finden sich vorteilhafte Weiterbildungen und Verbesserungen des Gegenstandes der Erfindung.In the dependent claims find advantageous developments and improvements of Subject of the invention.
Gemäss einer bevorzugten Weiterbildung ist die erste Gatedielektrikumschicht dicker als die zweite Gatedielektrikumschicht.According to one preferred development is the first gate dielectric layer thicker than the second gate dielectric layer.
Gemäss einer weiteren bevorzugten Weiterbildung ist das erste Wannenprofil tiefer als das zweite Wannenprofil.According to one Another preferred embodiment, the first trough profile is deeper as the second trough profile.
Gemäss einer weiteren bevorzugten Weiterbildung ist das erste Wannenprofil tiefer als das dritte und vierte Wannenprofil.According to one Another preferred embodiment, the first trough profile is deeper as the third and fourth bucket profile.
Gemäss einer weiteren bevorzugten Weiterbildung ist das erste Wannenprofil eine Grundwanne der Transistorstruktur und das zweite Wannenprofil eine Transistorwanne zur Einstellung der Schwellspannung der Transistorstruktur.According to one Another preferred embodiment, the first tray profile is a Base trough of the transistor structure and the second trough profile one Transistor well for adjusting the threshold voltage of the transistor structure.
Gemäss einer weiteren bevorzugten Weiterbildung ist das erste Wannenprofil eine Grundwanne der Transistorstruktur und das dritte und vierte Wannenprofil eine jeweilige Transistorwanne zur Einstellung der Schwellspannung der Transistorstruktur.According to one Another preferred embodiment, the first tray profile is a Base trough of the transistor structure and the third and fourth trough profile a respective transistor well for adjusting the threshold voltage the transistor structure.
Gemäss einer weiteren bevorzugten Weiterbildung ist die Streuschicht eine Oxidschicht.According to one Another preferred development is the litter layer an oxide layer.
Gemäss einer weiteren bevorzugten Weiterbildung ist die erste Gatedielektrikumschicht und/oder die zweite Gatedielektrikumschicht eine Oxidschicht.According to one Another preferred development is the first gate dielectric layer and / or the second gate dielectric layer is an oxide layer.
Gemäss einer weiteren bevorzugten Weiterbildung ist das Halbleitersubstrat ein Silizium-Halbleitersubstrat.According to one Another preferred development is the semiconductor substrate Silicon semiconductor substrate.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert.embodiments The invention is illustrated in the drawings and in the following Description closer explained.
Es zeigen:It demonstrate:
In den Figuren bezeichnen gleiche Bezugszeichen gleiche oder funktionsgleiche Bestandteile.In the same reference numerals designate the same or functionally identical Ingredients.
Gemäss der Darstellung
von
Anschließend erfolgt ein gleichzeitiges Tempern der resultierenden Struktur zur Ausbildung einer jeweiligen ersten Transistorwanne mit einem ersten Wannenprofil P aus den ersten Fremd-Ionen.Then done simultaneous annealing of the resulting structure for formation a respective first transistor well having a first well profile P from the first foreign ions.
Daran
anschließend
wird die Streuschicht
Daran
anschließend
erfolgt eine gleichzeitige zweite Implantation I' von zweiten Fremd-Ionen durch die erste
Gatedielektrikumsschicht
Mit
Bezug auf
Hierbei entsteht aus dem ersten Wannenprofil P ein doppelt getempertes erstes Wannenprofil TTP und wobei aus dem zweiten Wannenprofil P' ein einfach getempertes zweites Wannenprofil TP' entsteht.in this connection arises from the first tub profile P a double-tempered first Tub profile TTP and wherein from the second tub profile P 'a simply tempered second trough profile TP 'is created.
Somit ist das thermische Buget, dass das zweite Wannenprofil bei dieser Ausführungsform sieht erheblich vermindert.Consequently is the thermal buget that the second trough profile at this Embodiment sees significantly reduced.
Die weiteren Schritte zur Vervollständigung der Transistorstruktur sind im Stand der Technik wohl bekannt und wurden einleitend bereits zusammengefasst.The further steps to complete the Transistor structure are well known in the art and have been introductory already summarized.
Mit
Bezug auf
Im
Anschluss daran wird eine Implantation I von ersten Fremd-Ionen durch die Streuschicht
Mit
Bezug auf
Weiter
mit Bezug auf
Danach
erfolgt ein gleichzeitiges Durchführen einer zweiten Implantation
I' von zweiten Fremd-Ionen
durch die erste Gatedielektrikumsschicht
Bei
diesem Implantationsschritt ist die Tiefenerstreckung des dritten
Wannenprofils P1' etwas geringer
als diejenige des vierten Wannenprofils P2', da die Gatedielektrikumsschicht
Beim
Aufwachsen der zweiten Gatedielektrikumsschicht
Die weiteren Schritte zur Vervollständigung der Transistorstruktur sind im Stand der Technik wohl bekannt und wurden einleitend bereits zusammengefasst.The further steps to complete the Transistor structure are well known in the art and have been introductory already summarized.
Besonders vorteilhaft bei der zweiten Ausführungsform ist, dass das dritte Wannenprofil P1' und das vierte Wannenprofil P2' überhaupt keinem thermischen Prozess unterliegen, also in ihrer Ausdehnung sehr eng begrenzt werden können.Especially advantageous in the second embodiment is that the third trough profile P1 'and the fourth trough profile P2' no thermal Subject to very limited process can be.
Obwohl die vorliegende Erfindung vorstehend anhand eines bevorzugten Ausführungsbeispiels beschrieben wurde, ist sie darauf nicht beschränkt, sondern auf vielfältige Art und Weise modifizierbar.Even though the present invention above based on a preferred embodiment It is not limited to this, but in many ways and modifiable.
Insbesondere ist die Auswahl der Materialien nur beispielhaft und vielfältig modifizierbar.Especially the choice of materials is only exemplary and variously modifiable.
- 11
- Silizium-HalbleitersubstratSilicon semiconductor substrate
- AA
- erster Transistorbereichfirst transistor area
- BB
- zweiter Transistorbereichsecond transistor area
- II
- Transistorwannen-ImplantationTransistor well implantation
- I'I '
- Schwellspannungs-ImplantationThreshold voltage implantation
- 55
- Streuschicht aus Oxidscattering layer made of oxide
- PP
- erstes Wannenprofilfirst when profile
- P'P '
- zweites Wannenprofilsecond when profile
- P1', P2'P1 ', P2'
- drittes, viertes Wannenprofilthird, fourth trough profile
- 10a10a
- erstes Gatedielektrikum aus thermischem Oxidfirst Gate dielectric of thermal oxide
- 10b10b
- zweites Gatedielektrikum aus thermischem Oxidsecond Gate dielectric of thermal oxide
- TPTP
- einfach getempertes erstes Wannenprofileasy tempered first trough profile
- TP'TP '
- einfach getempertes zweites Wannenprofileasy tempered second trough profile
- TTPTTP
- zweifach getempertes erstes Wannenprofildoubly tempered first trough profile
- TTP'TTP '
- zweifach getempertes zweites Wannenprofildoubly tempered second trough profile
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE2003139702 DE10339702B4 (en) | 2003-08-28 | 2003-08-28 | Method for the joint production of different gate regions for a transistor structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003139702 DE10339702B4 (en) | 2003-08-28 | 2003-08-28 | Method for the joint production of different gate regions for a transistor structure |
Publications (2)
Publication Number | Publication Date |
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DE10339702A1 true DE10339702A1 (en) | 2005-04-07 |
DE10339702B4 DE10339702B4 (en) | 2006-07-13 |
Family
ID=34258261
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DE2003139702 Expired - Fee Related DE10339702B4 (en) | 2003-08-28 | 2003-08-28 | Method for the joint production of different gate regions for a transistor structure |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5989963A (en) * | 1997-07-21 | 1999-11-23 | Advanced Micro Devices, Inc. | Method for obtaining a steep retrograde channel profile |
US6245649B1 (en) * | 1999-02-17 | 2001-06-12 | Advanced Micro Devices, Inc. | Method for forming a retrograde impurity profile |
-
2003
- 2003-08-28 DE DE2003139702 patent/DE10339702B4/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5989963A (en) * | 1997-07-21 | 1999-11-23 | Advanced Micro Devices, Inc. | Method for obtaining a steep retrograde channel profile |
US6245649B1 (en) * | 1999-02-17 | 2001-06-12 | Advanced Micro Devices, Inc. | Method for forming a retrograde impurity profile |
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DE10339702B4 (en) | 2006-07-13 |
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Owner name: QIMONDA AG, 81739 MUENCHEN, DE |
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