USRE35228E - Inductive thin film head having improved readback characteristics - Google Patents
Inductive thin film head having improved readback characteristics Download PDFInfo
- Publication number
- USRE35228E USRE35228E US08/351,780 US35178094A USRE35228E US RE35228 E USRE35228 E US RE35228E US 35178094 A US35178094 A US 35178094A US RE35228 E USRE35228 E US RE35228E
- Authority
- US
- United States
- Prior art keywords
- magnetic
- thin film
- paddle
- lower pole
- magnetization
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/3113—Details for improving the magnetic domain structure or avoiding the formation or displacement of undesirable magnetic domains
Abstract
Description
______________________________________ Parameter Value ______________________________________ A 135-165 μm B Less than 35 μm C 85°-95° D 45°-90° ______________________________________
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/351,780 USRE35228E (en) | 1990-04-30 | 1994-12-08 | Inductive thin film head having improved readback characteristics |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/516,158 US5170303A (en) | 1990-04-30 | 1990-04-30 | Inductive thin film head having improved readback characteristics |
US08/351,780 USRE35228E (en) | 1990-04-30 | 1994-12-08 | Inductive thin film head having improved readback characteristics |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/516,158 Reissue US5170303A (en) | 1990-04-30 | 1990-04-30 | Inductive thin film head having improved readback characteristics |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE35228E true USRE35228E (en) | 1996-05-07 |
Family
ID=24054381
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/516,158 Ceased US5170303A (en) | 1990-04-30 | 1990-04-30 | Inductive thin film head having improved readback characteristics |
US08/351,780 Expired - Lifetime USRE35228E (en) | 1990-04-30 | 1994-12-08 | Inductive thin film head having improved readback characteristics |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/516,158 Ceased US5170303A (en) | 1990-04-30 | 1990-04-30 | Inductive thin film head having improved readback characteristics |
Country Status (3)
Country | Link |
---|---|
US (2) | US5170303A (en) |
EP (1) | EP0455359A3 (en) |
JP (1) | JP2744128B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5684660A (en) * | 1995-02-17 | 1997-11-04 | Aiwa Research And Development, Inc. | Thin film coil head assembly with protective planarizing cocoon structure |
US6404191B2 (en) * | 1997-08-08 | 2002-06-11 | Nve Corporation | Read heads in planar monolithic integrated circuit chips |
US6496330B1 (en) * | 1999-09-09 | 2002-12-17 | Read-Rite Corporation | Magnetic write head having a splitcoil structure |
US6507455B1 (en) * | 1999-03-18 | 2003-01-14 | Alps Electric Co., Ltd. | Thin film magnetic head capable of reducing coil resistance value of entire coil layer formed between core layers |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100437407B1 (en) * | 2002-04-04 | 2004-06-25 | 엘지전자 주식회사 | Latch apparatus in microwave oven |
Citations (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4242710A (en) * | 1979-01-29 | 1980-12-30 | International Business Machines Corporation | Thin film head having negative magnetostriction |
US4295173A (en) * | 1979-10-18 | 1981-10-13 | International Business Machines Corporation | Thin film inductive transducer |
EP0040994A1 (en) * | 1980-04-02 | 1981-12-02 | COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII - HONEYWELL BULL (dite CII-HB) | Magnetic transducer having a variable largest dimension gap for playing back or recording information on a magnetic carrier |
US4353102A (en) * | 1979-07-04 | 1982-10-05 | Matsushita Electric Industrial Co., Ltd. | Thin-film magnetic head |
JPS57203219A (en) * | 1981-06-10 | 1982-12-13 | Comput Basic Mach Technol Res Assoc | Thin film magnetic head |
US4423451A (en) * | 1981-08-10 | 1983-12-27 | Sperry Corporation | Thin film magnetic head having disparate poles for pulse asymmetry compensation |
JPS5977715A (en) * | 1982-10-26 | 1984-05-04 | Murata Mfg Co Ltd | Chip piezoelectric oscillator component |
US4458279A (en) * | 1981-03-23 | 1984-07-03 | Magnex Corporation | Thin film transducer and method of making same |
US4490760A (en) * | 1981-01-23 | 1984-12-25 | Matsushita Electric Industrial Co., Ltd. | Thin-film magnetic head |
US4589042A (en) * | 1983-06-27 | 1986-05-13 | International Business Machines Corporation | Composite thin film transducer head |
US4626947A (en) * | 1982-10-15 | 1986-12-02 | Computer Basic Technology Research Association | Thin film magnetic head |
US4644432A (en) * | 1985-01-28 | 1987-02-17 | International Business Machines | Three pole single element magnetic read/write head |
US4672495A (en) * | 1984-08-06 | 1987-06-09 | Fuji Photo Film Co., Ltd. | Thin-film magnetic head |
US4713711A (en) * | 1985-05-08 | 1987-12-15 | International Business Machines | Thin film magnetic transducer having center tapped winding |
US4750070A (en) * | 1986-03-19 | 1988-06-07 | Nec Corporation | Thin film magnetic head with a magnetic gap spacer of a thermally decomposed polymer |
US4797765A (en) * | 1985-04-03 | 1989-01-10 | Tdk Corporation | Thin film magnetic head having solder-bonded protective plate |
US4800454A (en) * | 1987-08-10 | 1989-01-24 | Magnetic Peripherals Inc. | Static charge protection for magnetic thin film data transducers |
US4807076A (en) * | 1986-07-22 | 1989-02-21 | Alps Electric Co., Ltd. | Thin film magnetic head for use in vertical magnetic recording |
US4819111A (en) * | 1986-08-29 | 1989-04-04 | Magnetic Peripheral Inc. | Thin film head with reduced cross section in the core for causing magnetic saturation in the leading leg's throat area |
US4821133A (en) * | 1987-02-17 | 1989-04-11 | Magnetic Peripherals, Inc. | Bottleneck magnetoresistive element |
JPH0198110A (en) * | 1987-10-12 | 1989-04-17 | Mitsubishi Electric Corp | Production of thin film magnetic head |
US4873599A (en) * | 1987-05-15 | 1989-10-10 | International Business Machines Corporation | Magnetic head assembly for perpendicular magnetic recording |
US4897747A (en) * | 1987-03-06 | 1990-01-30 | Thomson-Csf | Write/read head including monocrystalline magnetic thin films protected by a coating having hardened and lubricating zones |
US4900650A (en) * | 1988-05-12 | 1990-02-13 | Digital Equipment Corporation | Method of producing a pole piece with improved magnetic domain structure |
JPH0278006A (en) * | 1988-09-13 | 1990-03-19 | Nec Corp | Thin film magnetic head |
US5384680A (en) * | 1988-08-03 | 1995-01-24 | Digital Equipment Corporation | Perpendicular anisotropy in thin film devices |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60164914A (en) * | 1984-02-08 | 1985-08-28 | Fujitsu Ltd | Thin film magnetic head |
JPS60223014A (en) * | 1984-04-19 | 1985-11-07 | Citizen Watch Co Ltd | Production of thin film magnetic core |
JPS647401A (en) * | 1987-06-30 | 1989-01-11 | Stanley Electric Co Ltd | Head light for vehicle |
-
1990
- 1990-04-30 US US07/516,158 patent/US5170303A/en not_active Ceased
- 1990-11-26 JP JP2322260A patent/JP2744128B2/en not_active Expired - Fee Related
-
1991
- 1991-04-10 EP EP19910303147 patent/EP0455359A3/en not_active Withdrawn
-
1994
- 1994-12-08 US US08/351,780 patent/USRE35228E/en not_active Expired - Lifetime
Patent Citations (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4242710A (en) * | 1979-01-29 | 1980-12-30 | International Business Machines Corporation | Thin film head having negative magnetostriction |
US4353102A (en) * | 1979-07-04 | 1982-10-05 | Matsushita Electric Industrial Co., Ltd. | Thin-film magnetic head |
US4295173A (en) * | 1979-10-18 | 1981-10-13 | International Business Machines Corporation | Thin film inductive transducer |
US4386383A (en) * | 1980-04-02 | 1983-05-31 | Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) | Magnetic transducer comprising a gap of variable larger dimension for reading and writing data present on a magnetic carrier |
EP0040994A1 (en) * | 1980-04-02 | 1981-12-02 | COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII - HONEYWELL BULL (dite CII-HB) | Magnetic transducer having a variable largest dimension gap for playing back or recording information on a magnetic carrier |
US4490760A (en) * | 1981-01-23 | 1984-12-25 | Matsushita Electric Industrial Co., Ltd. | Thin-film magnetic head |
US4458279A (en) * | 1981-03-23 | 1984-07-03 | Magnex Corporation | Thin film transducer and method of making same |
JPS57203219A (en) * | 1981-06-10 | 1982-12-13 | Comput Basic Mach Technol Res Assoc | Thin film magnetic head |
US4423451A (en) * | 1981-08-10 | 1983-12-27 | Sperry Corporation | Thin film magnetic head having disparate poles for pulse asymmetry compensation |
US4626947A (en) * | 1982-10-15 | 1986-12-02 | Computer Basic Technology Research Association | Thin film magnetic head |
JPS5977715A (en) * | 1982-10-26 | 1984-05-04 | Murata Mfg Co Ltd | Chip piezoelectric oscillator component |
US4589042A (en) * | 1983-06-27 | 1986-05-13 | International Business Machines Corporation | Composite thin film transducer head |
US4672495A (en) * | 1984-08-06 | 1987-06-09 | Fuji Photo Film Co., Ltd. | Thin-film magnetic head |
US4644432A (en) * | 1985-01-28 | 1987-02-17 | International Business Machines | Three pole single element magnetic read/write head |
US4797765A (en) * | 1985-04-03 | 1989-01-10 | Tdk Corporation | Thin film magnetic head having solder-bonded protective plate |
US4713711A (en) * | 1985-05-08 | 1987-12-15 | International Business Machines | Thin film magnetic transducer having center tapped winding |
US4750070A (en) * | 1986-03-19 | 1988-06-07 | Nec Corporation | Thin film magnetic head with a magnetic gap spacer of a thermally decomposed polymer |
US4807076A (en) * | 1986-07-22 | 1989-02-21 | Alps Electric Co., Ltd. | Thin film magnetic head for use in vertical magnetic recording |
US4819111A (en) * | 1986-08-29 | 1989-04-04 | Magnetic Peripheral Inc. | Thin film head with reduced cross section in the core for causing magnetic saturation in the leading leg's throat area |
US4821133A (en) * | 1987-02-17 | 1989-04-11 | Magnetic Peripherals, Inc. | Bottleneck magnetoresistive element |
US4897747A (en) * | 1987-03-06 | 1990-01-30 | Thomson-Csf | Write/read head including monocrystalline magnetic thin films protected by a coating having hardened and lubricating zones |
US4873599A (en) * | 1987-05-15 | 1989-10-10 | International Business Machines Corporation | Magnetic head assembly for perpendicular magnetic recording |
US4800454A (en) * | 1987-08-10 | 1989-01-24 | Magnetic Peripherals Inc. | Static charge protection for magnetic thin film data transducers |
JPH0198110A (en) * | 1987-10-12 | 1989-04-17 | Mitsubishi Electric Corp | Production of thin film magnetic head |
US4900650A (en) * | 1988-05-12 | 1990-02-13 | Digital Equipment Corporation | Method of producing a pole piece with improved magnetic domain structure |
US5384680A (en) * | 1988-08-03 | 1995-01-24 | Digital Equipment Corporation | Perpendicular anisotropy in thin film devices |
JPH0278006A (en) * | 1988-09-13 | 1990-03-19 | Nec Corp | Thin film magnetic head |
Non-Patent Citations (2)
Title |
---|
EDN, vol. 22, No. 7, Apr. 5, 1977, pp. 32, 34 Thin Film Magnetic Recording Heads Promise to Increase Storage Densities by Roscamp et al. * |
IBM 3370 Film Head Design and Fabrication by Jones, Jr. * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5684660A (en) * | 1995-02-17 | 1997-11-04 | Aiwa Research And Development, Inc. | Thin film coil head assembly with protective planarizing cocoon structure |
US6404191B2 (en) * | 1997-08-08 | 2002-06-11 | Nve Corporation | Read heads in planar monolithic integrated circuit chips |
US6507455B1 (en) * | 1999-03-18 | 2003-01-14 | Alps Electric Co., Ltd. | Thin film magnetic head capable of reducing coil resistance value of entire coil layer formed between core layers |
US6496330B1 (en) * | 1999-09-09 | 2002-12-17 | Read-Rite Corporation | Magnetic write head having a splitcoil structure |
Also Published As
Publication number | Publication date |
---|---|
US5170303A (en) | 1992-12-08 |
JP2744128B2 (en) | 1998-04-28 |
JPH0411313A (en) | 1992-01-16 |
EP0455359A2 (en) | 1991-11-06 |
EP0455359A3 (en) | 1992-01-08 |
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Legal Events
Date | Code | Title | Description |
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FPAY | Fee payment |
Year of fee payment: 8 |
|
AS | Assignment |
Owner name: SEAGATE TECHNOLOGY LLC, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SEAGATE TECHNOLOGY, INC.;REEL/FRAME:011077/0319 Effective date: 20000728 |
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Owner name: THE CHASE MANHATTAN BANK, AS COLLATERAL AGENT, NEW Free format text: SECURITY AGREEMENT;ASSIGNOR:SEAGATE TECHNOLOGY LLC;REEL/FRAME:011461/0001 Effective date: 20001122 |
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FPAY | Fee payment |
Year of fee payment: 12 |
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Owner name: SEAGATE TECHNOLOGY LLC,CALIFORNIA Free format text: RELEASE OF SECURITY INTERESTS IN PATENT RIGHTS;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT (FORMERLY KNOWN AS THE CHASE MANHATTAN BANK AND JPMORGAN CHASE BANK);REEL/FRAME:016926/0342 Effective date: 20051130 Owner name: SEAGATE TECHNOLOGY LLC, CALIFORNIA Free format text: RELEASE OF SECURITY INTERESTS IN PATENT RIGHTS;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT (FORMERLY KNOWN AS THE CHASE MANHATTAN BANK AND JPMORGAN CHASE BANK);REEL/FRAME:016926/0342 Effective date: 20051130 |
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Owner name: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATE Free format text: SECURITY AGREEMENT;ASSIGNORS:MAXTOR CORPORATION;SEAGATE TECHNOLOGY LLC;SEAGATE TECHNOLOGY INTERNATIONAL;REEL/FRAME:022757/0017 Effective date: 20090507 Owner name: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT Free format text: SECURITY AGREEMENT;ASSIGNORS:MAXTOR CORPORATION;SEAGATE TECHNOLOGY LLC;SEAGATE TECHNOLOGY INTERNATIONAL;REEL/FRAME:022757/0017 Effective date: 20090507 |
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Owner name: SEAGATE TECHNOLOGY INTERNATIONAL, CALIFORNIA Free format text: RELEASE;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:025662/0001 Effective date: 20110114 Owner name: SEAGATE TECHNOLOGY LLC, CALIFORNIA Free format text: RELEASE;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:025662/0001 Effective date: 20110114 Owner name: MAXTOR CORPORATION, CALIFORNIA Free format text: RELEASE;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:025662/0001 Effective date: 20110114 Owner name: SEAGATE TECHNOLOGY HDD HOLDINGS, CALIFORNIA Free format text: RELEASE;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:025662/0001 Effective date: 20110114 |
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