KR960002153A - 자기저항효과형 자기헤드 - Google Patents

자기저항효과형 자기헤드 Download PDF

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Publication number
KR960002153A
KR960002153A KR1019950015351A KR19950015351A KR960002153A KR 960002153 A KR960002153 A KR 960002153A KR 1019950015351 A KR1019950015351 A KR 1019950015351A KR 19950015351 A KR19950015351 A KR 19950015351A KR 960002153 A KR960002153 A KR 960002153A
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KR
South Korea
Prior art keywords
magnetoresistive
thin film
magnetic shield
magnetoresistive effect
magnetic head
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Application number
KR1019950015351A
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English (en)
Inventor
노리오 사이또
겐이찌 바바
유다까 소다
Original Assignee
오가 노리오
소니 가부시기가이샤
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.)
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Application filed by 오가 노리오, 소니 가부시기가이샤 filed Critical 오가 노리오
Publication of KR960002153A publication Critical patent/KR960002153A/ko

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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
    • 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
    • G11B5/3948—Heads comprising more than one sensitive element the sensitive elements being active read-out elements
    • G11B5/3951—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes
    • G11B5/3954—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes the active elements transducing on a single track
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

본 발명은 자기저항효과형 자기헤드에 관한 것으로서, MR소자를 구성하는 2층의 MR박막의 MR효과의 밸런스를 유지하여, 바르크하우젠(Barkhausen) 노이즈의 발생을 억제하고, 출력을 안정화시킨다. 하층 자기실드코어, 상층 자기실드코어 사이에, 2층의 MR박막에 의하여 구성되는 MR소자를 하층 자기실드코어, MR박막 사이의 거리 d1가 상층 자기실드코어, MR박막 사이의 거리 d2보다 가까워지도록 배설하고, 하층 자기실드코어측의 MR박막의 막두께 t1를 상층 자기실드코어측의 MR박막의 막두께 t1보다 얇게 한다. 그리고, 0.5〈t1/t2로 하는 것이 바람직하다. 또한, 하층 자기실드코어에 가까운 쪽의 MR박막의 비저항 ρ1을 다른쪽의 MR박막의 비저항 ρ2보다 크게 해도 된다. 그리고, ρ1/ρ2〉3으로 하는 것이 바람직하다.

Description

자기저항효과형 자기헤드
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명을 적용한 복합형 자기헤드를 나타낸 단면도,
제2도는 본 발명을 적용한 복합형 MR헤드의 MR소자 근방의 요부확대단면도.

Claims (8)

  1. 2층의 자기저항효과박막이 절연층을 개재하여 적층되어 이루어지는 자기저항효과소자가 1쌍의 자기실드코어 사이에 배설되어 이루어지는 자기저항효과형 자기헤드에 있어서, 자기저항효과박막증, 자기실드코어에 가까운 쪽의 자기저항효과박막의 막두께를 자기실드코어로부터 먼 쪽의 자기저항효과박막의 막두께보다 얇게 한 것을 특징으로 하는 자기저항효과형 자기헤드.
  2. 2층의 자기저항효과박막이 절연층을 개재하여 적층되어 이루어지는 자기저항효과소자가 1쌍의 자기실드코어 사이에 배설되어 이루어지는 자기저항효과형 자기헤드에 있어서, 상기 자기저항효과소자를 구성하는 2층의 자기저항효과박막증, 자기실드코어에 가까운 쪽의 자기저항효과박막의 비저항을 자기실드코어로부터 먼 쪽의 자기저항효과박막의 비허항보다 크게 한 것을 특징으로 하는 자기저항효과형 자기헤드.
  3. 2층의 자기저항효과박막이 절연층을 개재하여 적층되어 이루어지는 자기저항효과소자가 1쌍의 자기실드코어 사이에 배설되어 이루어지는 자기저항효과형 자기헤드에 있어서, 자기저항효과박막증, 자기실드코어에 가까운 쪽의 자기저항효과박막의 막두께를 다른 쪽의 자기저항효과박막의 막두께보다 얇게 한 것을 특징으로 하는 자기저항효과형 자기헤드.
  4. 제1항에 있어서, 자기실드코어에 가까운 쪽의 자기저항효과박막의 막두께를 t1, 자기실드코어로부터 먼 쪽의 자기저항효과박막의 막두께를 t2로 했을 때에, 0.5〈t1/t2인 것을 특징으로 하는 자기저항효과형 자기헤드.
  5. 제4항에 있어서, t1/t2〈0.7인 것을 특징으로 하는 자기저항효과형 자기헤드.
  6. 2층의 자기저항효과박막이 절연층을 개재하여 적층되어 이루어지는 자기저항효과소자가 1쌍의 자기실드코어 사이에 배설되어 이루어지고, 2층의 자기저항효과박막증의 한쪽은 다른 쪽보다 자기실드코어에 가까운 자기저항효과형 자기헤드에 있어서, 상기 자기저항효과소자를 구성하는 2층의 자기저항효과박막증, 자기실드코어에 가까운 쪽의 자기저항효과박막의 막두께를 다른 쪽의 자기저항효과박막의 비저항보다 크게 한 것을 특징으로 하는 자기저항효과형 자기헤드.
  7. 제6항에 있어서, 자기실드코어에 가까운 쪽의 자기저항효과박막의 비저항을 ρ1, 다른 쪽의 자기저항효과박막의 비저항을 ρ2로 했을 때에, ρ1/ρ2〉3인 것을 특징으로 하는 자기저항효과형 자기헤드.
  8. 제6항에 있어서, 자기저항효과소자를 구성하는 2층의 자기저항효과박막증, 자기실드코어에 가까운 쪽의 자기저항효과박막의 막두께를 다른 쪽의 자기저항효과박막의 막두께보다 얇게 한 것을 특징으로 하는 자기저항효과형 자기헤드.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019950015351A 1994-06-13 1995-06-12 자기저항효과형 자기헤드 KR960002153A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6130649A JPH087229A (ja) 1994-06-13 1994-06-13 磁気抵抗効果型磁気ヘッド
JP1994-130649 1994-06-13

Publications (1)

Publication Number Publication Date
KR960002153A true KR960002153A (ko) 1996-01-26

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ID=15039306

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Application Number Title Priority Date Filing Date
KR1019950015351A KR960002153A (ko) 1994-06-13 1995-06-12 자기저항효과형 자기헤드

Country Status (5)

Country Link
US (2) US5661620A (ko)
EP (1) EP0691642B1 (ko)
JP (1) JPH087229A (ko)
KR (1) KR960002153A (ko)
DE (1) DE69506629T2 (ko)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH087229A (ja) * 1994-06-13 1996-01-12 Sony Corp 磁気抵抗効果型磁気ヘッド
JPH10340430A (ja) * 1997-06-10 1998-12-22 Fujitsu Ltd スピンバルブ磁気抵抗効果型ヘッドおよび磁気記憶装置
SG68063A1 (en) 1997-07-18 1999-10-19 Hitachi Ltd Magnetoresistive effect type reproducing head and magnetic disk apparatus equipped with the reproducing head
US5956215A (en) * 1997-08-12 1999-09-21 Storage Technology Corporation High density thin film coupled element read head with support element to prevent damage to magnetoresistive element
JP3366256B2 (ja) 1998-07-02 2003-01-14 アルプス電気株式会社 薄膜磁気ヘッド及びその製造方法
DE10162752A1 (de) * 2001-12-20 2003-07-03 Philips Intellectual Property Magnetoresistiver Sensor
EP1422526A1 (en) * 2002-10-28 2004-05-26 MTM Laboratories AG Method for improved diagnosis of dysplasias
DE602004016483D1 (de) * 2004-07-16 2008-10-23 St Microelectronics Sa Elektronische Schaltungsanordnung, Vorrichtung mit solcher Anordnung und Herstellungsverfahren

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639808A (en) * 1984-09-26 1987-01-27 Storage Technology Corporation Asymmetrical shields for controlling feedthrough in read/write heads
JPS63181108A (ja) * 1987-01-21 1988-07-26 Sony Corp 磁気抵抗効果型磁気ヘツド
US5073836A (en) * 1989-10-05 1991-12-17 Hewlett-Packard Company Single pole write and a differential magneto-resistive read for perpendicular recording
JPH064831A (ja) * 1992-06-22 1994-01-14 Sumitomo Metal Ind Ltd 薄膜磁気ヘッド
US5323285A (en) * 1992-06-23 1994-06-21 Eastman Kodak Company Shielded dual element magnetoresistive reproduce head exhibiting high density signal amplification
US5309305A (en) * 1992-11-16 1994-05-03 Read-Rite Corporation Dual element magnetoresistive sensing head
JPH087229A (ja) * 1994-06-13 1996-01-12 Sony Corp 磁気抵抗効果型磁気ヘッド

Also Published As

Publication number Publication date
EP0691642A2 (en) 1996-01-10
EP0691642A3 (en) 1997-01-02
DE69506629D1 (de) 1999-01-28
US5661620A (en) 1997-08-26
DE69506629T2 (de) 1999-07-01
US5786965A (en) 1998-07-28
EP0691642B1 (en) 1998-12-16
JPH087229A (ja) 1996-01-12

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