DE68918289T2 - Dünnfilm-permanentmagnet zur vormagnetisierung der schweren und leichten achsen eines mr-magnetkopfs. - Google Patents
Dünnfilm-permanentmagnet zur vormagnetisierung der schweren und leichten achsen eines mr-magnetkopfs.Info
- Publication number
- DE68918289T2 DE68918289T2 DE68918289T DE68918289T DE68918289T2 DE 68918289 T2 DE68918289 T2 DE 68918289T2 DE 68918289 T DE68918289 T DE 68918289T DE 68918289 T DE68918289 T DE 68918289T DE 68918289 T2 DE68918289 T2 DE 68918289T2
- Authority
- DE
- Germany
- Prior art keywords
- magnet
- magnetizing
- heavy
- thin film
- permanent magnet
- 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 - Fee Related
Links
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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/292,708 US4972284A (en) | 1989-01-03 | 1989-01-03 | Deposited permanent magnet for hard and easy axes biasing of a magnetoresistive head |
PCT/US1989/005833 WO1990007774A1 (en) | 1989-01-03 | 1989-12-26 | Deposited permanent magnet for hard and easy axes biasing of a magnetoresistive head |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68918289D1 DE68918289D1 (de) | 1994-10-20 |
DE68918289T2 true DE68918289T2 (de) | 1995-04-06 |
Family
ID=23125850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68918289T Expired - Fee Related DE68918289T2 (de) | 1989-01-03 | 1989-12-26 | Dünnfilm-permanentmagnet zur vormagnetisierung der schweren und leichten achsen eines mr-magnetkopfs. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4972284A (de) |
EP (1) | EP0452369B1 (de) |
JP (1) | JPH04502680A (de) |
DE (1) | DE68918289T2 (de) |
WO (1) | WO1990007774A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2826895B2 (ja) * | 1990-09-19 | 1998-11-18 | ティーディーケイ株式会社 | 永久磁石磁気回路 |
US5193039A (en) * | 1991-04-17 | 1993-03-09 | Digital Equipment Corporation | Permanet magnet easy-axis biased magnetoresistive head |
SG47479A1 (en) * | 1992-08-25 | 1998-04-17 | Seagate Technology | A magnetoresistive sensor and method of making the same |
US5737156A (en) * | 1993-11-08 | 1998-04-07 | Seagate Technology, Inc. | Barberpole MR sensor having interleaved permanent magnet and magnetoresistive segments |
US5406433A (en) * | 1993-12-01 | 1995-04-11 | Eastman Kodak Company | Dual magnetoresistive head for reproducing very narrow track width short wavelength data |
US5428491A (en) * | 1993-12-03 | 1995-06-27 | Eastman Kodak Company | Magnetoresistive head with deposited biasing magnet |
US5546254A (en) * | 1994-07-07 | 1996-08-13 | International Business Machines Corporation | Orthogonal MR Read head with single hard biased MR stripe |
JP3471520B2 (ja) * | 1996-04-30 | 2003-12-02 | 富士通株式会社 | 磁気抵抗効果型磁気ヘッドの製造方法及び磁気抵抗効果型磁気ヘッドの製造装置 |
US5946169A (en) * | 1996-11-07 | 1999-08-31 | Seagate Technology, Inc. | Soft adjacent layer vertically biased magnetoresistive sensor having improved sensor stability |
US5949623A (en) * | 1997-09-11 | 1999-09-07 | International Business Machines Corporation | Monolayer longitudinal bias and sensor trackwidth definition for overlaid anisotropic and giant magnetoresistive heads |
US6356420B1 (en) | 1998-05-07 | 2002-03-12 | Seagate Technology Llc | Storage system having read head utilizing GMR and AMr effects |
US6005753A (en) * | 1998-05-29 | 1999-12-21 | International Business Machines Corporation | Magnetic tunnel junction magnetoresistive read head with longitudinal and transverse bias |
US6937007B1 (en) * | 2003-04-07 | 2005-08-30 | Sauer-Danfoss Inc. | Magnet field symmetry for hall sensor |
US7492550B2 (en) * | 2003-11-18 | 2009-02-17 | Tandberg Storage Asa | Magnetic recording head and method for high coercivity media, employing concentrated stray magnetic fields |
US7757579B2 (en) * | 2004-08-30 | 2010-07-20 | Sauer-Danfoss Inc. | Joystick device with redundant sensor processing |
US8867178B2 (en) * | 2012-10-16 | 2014-10-21 | HGST Netherlands B.V. | Read sensor with a hard bias layer having a high static field resistance |
WO2019017219A1 (ja) * | 2017-07-19 | 2019-01-24 | 三菱電機株式会社 | 磁気センサ装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3814863A (en) * | 1972-10-11 | 1974-06-04 | Ibm | Internally biased magnetoresistive magnetic transducer |
US4034414A (en) * | 1974-12-04 | 1977-07-05 | Matsushita Electric Industrial Co., Ltd. | Magnetic head |
JPS54157610A (en) * | 1978-05-26 | 1979-12-12 | Sony Corp | Magnetic head |
US4649447A (en) * | 1985-08-15 | 1987-03-10 | International Business Machines | Combed MR sensor |
JPS6266413A (ja) * | 1985-09-18 | 1987-03-25 | Sony Corp | 磁気抵抗効果型磁気センサ− |
JPS62137713A (ja) * | 1985-12-10 | 1987-06-20 | Victor Co Of Japan Ltd | 磁気抵抗効果型磁気ヘツド |
-
1989
- 1989-01-03 US US07/292,708 patent/US4972284A/en not_active Expired - Lifetime
- 1989-12-26 DE DE68918289T patent/DE68918289T2/de not_active Expired - Fee Related
- 1989-12-26 EP EP90901491A patent/EP0452369B1/de not_active Expired - Lifetime
- 1989-12-26 JP JP2501925A patent/JPH04502680A/ja active Pending
- 1989-12-26 WO PCT/US1989/005833 patent/WO1990007774A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
WO1990007774A1 (en) | 1990-07-12 |
US4972284A (en) | 1990-11-20 |
DE68918289D1 (de) | 1994-10-20 |
JPH04502680A (ja) | 1992-05-14 |
EP0452369A1 (de) | 1991-10-23 |
EP0452369B1 (de) | 1994-09-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8328 | Change in the person/name/address of the agent |
Representative=s name: BLICKLE, K., DIPL.-ING., PAT.-ASS., 70327 STUTTGAR |
|
8328 | Change in the person/name/address of the agent |
Representative=s name: DR. KUEHNER, H., RECHTSANW., 70327 STUTTGART |
|
8339 | Ceased/non-payment of the annual fee |