DE69025820D1 - Dünnfilmmagnetkopf - Google Patents

Dünnfilmmagnetkopf

Info

Publication number
DE69025820D1
DE69025820D1 DE69025820T DE69025820T DE69025820D1 DE 69025820 D1 DE69025820 D1 DE 69025820D1 DE 69025820 T DE69025820 T DE 69025820T DE 69025820 T DE69025820 T DE 69025820T DE 69025820 D1 DE69025820 D1 DE 69025820D1
Authority
DE
Germany
Prior art keywords
thin film
magnetic head
film magnetic
head
thin
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
Application number
DE69025820T
Other languages
English (en)
Other versions
DE69025820T2 (de
Inventor
Toshio Fukazawa
Yuji Nagata
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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
Priority claimed from JP1203259A external-priority patent/JP2563596B2/ja
Priority claimed from JP1203258A external-priority patent/JP2563595B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE69025820D1 publication Critical patent/DE69025820D1/de
Publication of DE69025820T2 publication Critical patent/DE69025820T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • 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
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3916—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide
    • G11B5/3919—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path
    • G11B5/3922—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure
    • G11B5/3925—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure the two parts being thin films
    • 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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
    • G11B5/2452—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track where the dimensions of the effective gap are controlled
    • 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
    • G11B5/3116—Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks
    • 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
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3945—Heads comprising more than one sensitive element
    • 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
    • G11B5/3967—Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read
DE69025820T 1989-08-04 1990-07-31 Dünnfilmmagnetkopf Expired - Fee Related DE69025820T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1203259A JP2563596B2 (ja) 1989-08-04 1989-08-04 複合型薄膜磁気ヘッド
JP1203258A JP2563595B2 (ja) 1989-08-04 1989-08-04 複合型薄膜磁気ヘッド

Publications (2)

Publication Number Publication Date
DE69025820D1 true DE69025820D1 (de) 1996-04-18
DE69025820T2 DE69025820T2 (de) 1996-10-02

Family

ID=26513827

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69025820T Expired - Fee Related DE69025820T2 (de) 1989-08-04 1990-07-31 Dünnfilmmagnetkopf

Country Status (4)

Country Link
US (1) US5097372A (de)
EP (1) EP0411914B1 (de)
KR (1) KR940004989B1 (de)
DE (1) DE69025820T2 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9000546A (nl) * 1990-03-09 1991-10-01 Philips Nv Werkwijze voor het vervaardigen van een dunnefilm magneetkop alsmede een dunnefilm magneetkop vervaardigbaar volgens de werkwijze.
JPH0434713A (ja) * 1990-05-30 1992-02-05 Sony Corp 磁気抵抗効果型薄膜ヘッド
NL9001629A (nl) * 1990-07-18 1992-02-17 Philips Nv Dunnefilm magneetkop.
DE69126082T2 (de) * 1990-09-27 1997-10-02 Toshiba Kawasaki Kk Magnetischer Kopf
JP2687258B2 (ja) * 1991-04-26 1997-12-08 キヤノン株式会社 情報記録部を備えたフィルムに対して使用されるヘッド装置及び情報記録部を備えたフィルムを使用する装置
US5269895A (en) * 1991-05-21 1993-12-14 North American Philips Corporation Method of making composite structure with single domain magnetic element
JP3022023B2 (ja) 1992-04-13 2000-03-15 株式会社日立製作所 磁気記録再生装置
US5995339A (en) * 1993-03-18 1999-11-30 Fujitsu Limited Magnetoresistive head with a front flux guide and an embedded MR element
JP2788403B2 (ja) * 1993-03-18 1998-08-20 富士通株式会社 磁気抵抗効果ヘッド
US6078479A (en) * 1993-08-10 2000-06-20 Read-Rite Corporation Magnetic tape head with flux sensing element
EP0638893A3 (de) * 1993-08-10 1996-05-15 Read Rite Corp Magnetkopf mit Flusssensorelement für Bandaufnahme/wiedergabe.
JP2780916B2 (ja) * 1993-12-08 1998-07-30 富士通株式会社 垂直磁気記録用磁気ヘッド
US6005751A (en) * 1994-01-28 1999-12-21 Seagate Technology, Inc. Recording head skewed read gap/write gap positioning
US5434733A (en) * 1994-02-18 1995-07-18 Hewlett-Packard Company Planar head having separate read and write gaps
US5604651A (en) * 1994-02-23 1997-02-18 Applied Magentics Corporation Read head with 4-point magnetoresistive sensing
US5436779A (en) * 1994-03-31 1995-07-25 Read-Rite Corporation Integrated yoke magnetoresistive transducer with magnetic shunt
US5502522A (en) * 1994-05-12 1996-03-26 Eastman Kodak Company Compact magnetic head for a photographic camera
US5493467A (en) * 1994-12-27 1996-02-20 International Business Machines Corporation Yoke spin valve MR read head
US5982177A (en) * 1997-08-08 1999-11-09 Florida State University Magnetoresistive sensor magnetically biased in a region spaced from a sensing region
JP2001110017A (ja) * 1999-10-13 2001-04-20 Sony Corp 磁気抵抗効果型磁気ヘッド及び回転型磁気ヘッド装置
JP4202958B2 (ja) * 2004-03-30 2008-12-24 株式会社東芝 磁気抵抗効果素子

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1344890A (en) * 1971-08-21 1974-01-23 Ibm Electromagnetic transducers
JPS51126115A (en) * 1975-04-25 1976-11-04 Nippon Telegr & Teleph Corp <Ntt> Thin film magnetic head
US4566050A (en) * 1982-12-30 1986-01-21 International Business Machines Corp. (Ibm) Skew insensitive magnetic read head
JPS6050612A (ja) * 1983-08-29 1985-03-20 Sony Corp 磁気抵抗効果型磁気ヘツド
DE3340600C1 (de) * 1983-11-10 1985-01-10 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Lesekopf zum magnetischen Abtasten von Wiegand-Draehten
JPS60182008A (ja) * 1984-02-28 1985-09-17 Matsushita Electric Ind Co Ltd 薄膜磁気ヘツド
JPS61196418A (ja) * 1985-02-25 1986-08-30 Matsushita Electric Ind Co Ltd 薄膜磁気ヘツド
US4802043A (en) * 1985-03-25 1989-01-31 Hitachi, Ltd. Magneto-resistive head for protecting against output spike noises
DE3613619A1 (de) * 1985-04-26 1986-10-30 Sharp K.K., Osaka Duennfilm-magnetkopf
JPS61276110A (ja) * 1985-05-30 1986-12-06 Nec Corp 磁気抵抗効果型磁気ヘツド
JPS6243813A (ja) * 1985-08-20 1987-02-25 Seiko Epson Corp 磁気ヘツド
JPS6288119A (ja) * 1985-10-14 1987-04-22 Fujitsu Ltd 薄膜磁気ヘツド用磁極
JPH0831204B2 (ja) * 1985-10-18 1996-03-27 富士通株式会社 薄膜磁気ヘツド
JPS6292215A (ja) * 1985-10-18 1987-04-27 Seiko Epson Corp 磁気ヘツド
EP0269129B1 (de) * 1986-11-28 1993-09-22 Nec Corporation Dünnfilmmagnetkopf
US4935832A (en) * 1987-04-01 1990-06-19 Digital Equipment Corporation Recording heads with side shields
KR930005338B1 (ko) * 1987-04-01 1993-06-17 디지탈 이퀴프먼트 코포레이숀 디지탈 데이타 처리 시스템의 자기(磁氣)기억장치용 자기(磁氣) 저항성 박막 헤드
US4885649A (en) * 1987-04-01 1989-12-05 Digital Equipment Corporation Thin film head having a magneto-restrictive read element
US4816947A (en) * 1987-11-12 1989-03-28 International Business Machines Single track vertical and horizontal recording read/write head design
JPH01138608A (ja) * 1987-11-26 1989-05-31 Matsushita Electric Ind Co Ltd Ｍｒヘッド
US4881143A (en) * 1988-01-19 1989-11-14 Hewlett-Packard Company Compensated magneto-resistive read head
JPH01307008A (ja) * 1988-06-03 1989-12-12 Hitachi Ltd 薄膜磁気ヘツド
JPH02105307A (ja) * 1988-10-14 1990-04-17 Sumitomo Metal Ind Ltd 薄膜磁気ヘッドの製造方法

Also Published As

Publication number Publication date
EP0411914B1 (de) 1996-03-13
EP0411914A3 (en) 1991-10-16
EP0411914A2 (de) 1991-02-06
US5097372A (en) 1992-03-17
DE69025820T2 (de) 1996-10-02
KR910005235A (ko) 1991-03-30
KR940004989B1 (ko) 1994-06-09

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee