DE3888680D1 - Lamellierte pole für magnetköpfe. - Google Patents

Lamellierte pole für magnetköpfe.

Info

Publication number
DE3888680D1
DE3888680D1 DE89900558T DE3888680T DE3888680D1 DE 3888680 D1 DE3888680 D1 DE 3888680D1 DE 89900558 T DE89900558 T DE 89900558T DE 3888680 T DE3888680 T DE 3888680T DE 3888680 D1 DE3888680 D1 DE 3888680D1
Authority
DE
Germany
Prior art keywords
fined
poles
magnetic heads
heads
magnetic
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
DE89900558T
Other languages
English (en)
Other versions
DE3888680T2 (de
Inventor
Michael Mallory
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.)
Digital Equipment Corp
Original Assignee
Digital Equipment Corp
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
Application filed by Digital Equipment Corp filed Critical Digital Equipment Corp
Publication of DE3888680D1 publication Critical patent/DE3888680D1/de
Application granted granted Critical
Publication of DE3888680T2 publication Critical patent/DE3888680T2/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
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3143—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding
    • G11B5/3146—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers
    • G11B5/3153—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers including at least one magnetic thin film coupled by interfacing to the basic magnetic thin film structure
    • 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
    • G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Heads (AREA)
  • Thin Magnetic Films (AREA)
DE3888680T 1987-12-04 1988-12-05 Lamellierte pole für magnetköpfe. Expired - Fee Related DE3888680T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12886687A 1987-12-04 1987-12-04
PCT/US1988/004313 WO1989005505A1 (en) 1987-12-04 1988-12-05 Laminated poles for recording heads

Publications (2)

Publication Number Publication Date
DE3888680D1 true DE3888680D1 (de) 1994-04-28
DE3888680T2 DE3888680T2 (de) 1994-09-08

Family

ID=22437374

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3888680T Expired - Fee Related DE3888680T2 (de) 1987-12-04 1988-12-05 Lamellierte pole für magnetköpfe.

Country Status (4)

Country Link
EP (1) EP0344278B1 (de)
JP (1) JPH07114007B2 (de)
DE (1) DE3888680T2 (de)
WO (1) WO1989005505A1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5085935A (en) * 1988-08-03 1992-02-04 Digital Equipment Corporation Flux spreading thin film magnetic devices
US5032945A (en) * 1989-11-07 1991-07-16 International Business Machines Corp. Magnetic thin film structures fabricated with edge closure layers
US5157570A (en) * 1990-06-29 1992-10-20 Digital Equipment Corporation Magnetic pole configuration for high density thin film recording head
US5187628A (en) * 1990-10-12 1993-02-16 Fujitsu Limited Thin film magnetic head having magnetic anisotropy with in-plane and perpendicular components
JPH04362505A (ja) * 1991-02-27 1992-12-15 Internatl Business Mach Corp <Ibm> 薄膜磁気読み出し／書き込みヘッド及び磁気記録システム
JPH0676238A (ja) * 1992-07-08 1994-03-18 Fuji Electric Co Ltd 薄膜磁気ヘッド
JPH0778309A (ja) * 1993-07-14 1995-03-20 Sony Corp 薄膜磁気ヘッド及び磁気抵抗効果型磁気ヘッド並びに複合型磁気ヘッド
US5666250A (en) * 1993-11-23 1997-09-09 Seagate Technology, Inc. Thin film magnetic heads with thin nickel underlayers
JP3539732B2 (ja) * 1993-11-23 2004-07-07 シーゲイト テクノロジー エルエルシー 薄いニッケル下層を備えた薄膜磁気ヘッド
WO1995014991A1 (en) * 1993-11-23 1995-06-01 Seagate Technology, Inc. Thin film magnetic heads with thin nickel underlayers
DE69524897T2 (de) * 1994-03-31 2002-08-29 Matsushita Electric Ind Co Ltd Magnetaufzeichnungs- und -wiedergabegerät
US7609478B2 (en) * 2006-03-28 2009-10-27 Seagate Technology Llc Magnetic writer pole with a graded magnetic moment

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2205701B1 (de) * 1972-11-07 1977-08-05 Cii
FR2489570A1 (fr) * 1980-08-27 1982-03-05 Cii Honeywell Bull Transducteur magnetique integre

Also Published As

Publication number Publication date
JPH02501518A (ja) 1990-05-24
JPH07114007B2 (ja) 1995-12-06
EP0344278A1 (de) 1989-12-06
EP0344278B1 (de) 1994-03-23
DE3888680T2 (de) 1994-09-08
WO1989005505A1 (en) 1989-06-15

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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

Free format text: GRUENECKER, KINKELDEY, STOCKMAIR & SCHWANHAEUSSER, 80538 MUENCHEN

8339 Ceased/non-payment of the annual fee