ZA796369B - Thin film magnetic heads - Google Patents

Thin film magnetic heads

Info

Publication number
ZA796369B
ZA796369B ZA00796369A ZA796369A ZA796369B ZA 796369 B ZA796369 B ZA 796369B ZA 00796369 A ZA00796369 A ZA 00796369A ZA 796369 A ZA796369 A ZA 796369A ZA 796369 B ZA796369 B ZA 796369B
Authority
ZA
South Africa
Prior art keywords
thin film
film magnetic
magnetic heads
heads
thin
Prior art date
Application number
ZA00796369A
Other languages
English (en)
Inventor
M Church
R Jones
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of ZA796369B publication Critical patent/ZA796369B/xx

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
    • G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
    • G11B5/3136—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure for reducing the pole-tip-protrusion at the head transducing surface, e.g. caused by thermal expansion of dissimilar materials
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Heads (AREA)
ZA00796369A 1978-12-21 1979-11-23 Thin film magnetic heads ZA796369B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/972,103 US4219854A (en) 1978-12-21 1978-12-21 Thin film magnetic head assembly

Publications (1)

Publication Number Publication Date
ZA796369B true ZA796369B (en) 1980-11-26

Family

ID=25519164

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00796369A ZA796369B (en) 1978-12-21 1979-11-23 Thin film magnetic heads

Country Status (9)

Country Link
US (1) US4219854A (xx)
EP (1) EP0012910B1 (xx)
JP (1) JPS5584020A (xx)
AU (1) AU524436B2 (xx)
BR (1) BR7908415A (xx)
CA (1) CA1126402A (xx)
DE (1) DE2961279D1 (xx)
ES (1) ES486015A1 (xx)
ZA (1) ZA796369B (xx)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4353102A (en) * 1979-07-04 1982-10-05 Matsushita Electric Industrial Co., Ltd. Thin-film magnetic head
JPS5611613A (en) * 1979-07-04 1981-02-05 Matsushita Electric Ind Co Ltd Thin film magnetic head
JPS5674811A (en) * 1979-11-20 1981-06-20 Matsushita Electric Ind Co Ltd Magnetic head
US4375657A (en) * 1980-11-03 1983-03-01 Brock George W Magnetic head assembly
US4420505A (en) * 1981-02-04 1983-12-13 Eastman Kodak Company Method of making a thin film magnetic head having good low frequency response
US4399479A (en) * 1981-02-04 1983-08-16 Eastman Kodak Company Thin film magnetic head having good low frequency response
JPS5819717A (ja) * 1981-07-30 1983-02-04 Fujitsu Ltd 垂直磁化記録再生用ヘッド
US4404609A (en) * 1981-10-30 1983-09-13 International Business Machines Corporation Thin film inductive transducer for perpendicular recording
US4458280A (en) * 1982-01-18 1984-07-03 International Business Machines Corporation Servo writing transducer design and writing method
US4494125A (en) * 1982-05-26 1985-01-15 Ferix Corporation Differential-permeability field-concentrating magnetic read/write head
JPS5971115A (ja) * 1982-10-15 1984-04-21 Hitachi Ltd 磁気ヘッド
US4593334A (en) * 1983-05-02 1986-06-03 International Business Machines Corporation Thin film transducer
JPS59231722A (ja) * 1983-06-13 1984-12-26 Matsushita Electric Ind Co Ltd 薄膜磁気ヘッドの製造方法
DE3346885A1 (de) * 1983-12-23 1985-07-11 Siemens AG, 1000 Berlin und 8000 München Duennschicht-magnetkopf fuer ein senkrecht zu magnetisierendes aufzeichnungsmedium
DE3346777A1 (de) * 1983-12-23 1985-07-04 Siemens AG, 1000 Berlin und 8000 München Duennschicht-magnetkopf zur senkrechten (vertikalen) aufzeichnung
EP0166890B1 (de) * 1984-05-04 1988-12-14 Siemens Aktiengesellschaft Dünnschicht-Magnetkopf mit einem Doppelspalt für ein senkrecht zur magnetisierendes Aufzeichnungsmedium
DE3418822A1 (de) * 1984-05-21 1985-11-21 Siemens AG, 1000 Berlin und 8000 München Schreib-/lese-magnetkopf mit einem schichtweisen aufbau fuer ein senkrecht zu magnetisierendes aufzeichnungsmedium
DE3419650A1 (de) * 1984-05-25 1985-11-28 Siemens AG, 1000 Berlin und 8000 München Duennschicht-magnetkopf zum schreiben und lesen fuer ein senkrecht zu magnetisierendes aufzeichnungs-medium
DE3420746A1 (de) * 1984-06-04 1985-12-05 Siemens AG, 1000 Berlin und 8000 München Schichtweise aufgebauter magnetkopf fuer ein senkrecht zu magnetisierendes aufzeichnungsmedium
US4644432A (en) * 1985-01-28 1987-02-17 International Business Machines Three pole single element magnetic read/write head
US4764834A (en) * 1985-03-22 1988-08-16 Applied Magnetics Corporation Thin film magnetic transducer having a separate magnetically conductive layer
DE3513431A1 (de) * 1985-04-15 1986-10-23 Siemens AG, 1000 Berlin und 8000 München Verfahren zur herstellung mindestens eines magnetkopfes in duennfilmtechnik
US4740855A (en) * 1985-10-18 1988-04-26 Siemens Aktiengesellschaft Magnetic thin-film head having a main and an auxiliary pole for vertical magnetization
JP2514624B2 (ja) * 1985-11-29 1996-07-10 日本電信電話株式会社 薄膜磁気ヘッド
DE3544823A1 (de) * 1985-12-18 1987-06-19 Siemens Ag Duennfilm-magnetkopf fuer ein longitudinal oder senkrecht zu magnetisierendes aufzeichnungsmedium
DE3544851A1 (de) * 1985-12-18 1987-06-19 Siemens Ag Duennfilm-magnetkopf zur longitudinalen oder senkrechten magnetisierung eines entsprechenden aufzeichnungsmediums
DE3544883A1 (de) * 1985-12-18 1987-06-19 Siemens Ag Duennfilm-magnetkopf zur senkrechten magnetisierung eines entsprechenden aufzeichnungsmediums
EP0232505A1 (de) * 1985-12-20 1987-08-19 Siemens Aktiengesellschaft Magnetische Speichereinrichtung mit einem senkrecht zu magnetisierenden Aufzeichnungsmedium
JPS62173607A (ja) * 1986-01-27 1987-07-30 Hitachi Ltd 薄膜磁気ヘツド
JPS6320079A (ja) * 1986-07-11 1988-01-27 ヤンマー農機株式会社 穀粒などの粒状体の感知センサ−装置
US4875124A (en) * 1988-01-11 1989-10-17 International Business Machines Corporation Thin film magnetic heads with thermally crosslinked insulation
DE3831803C2 (de) * 1988-09-19 1995-02-09 Siemens Ag Dünnfilm-Magnetkopf mit einer flachen Schreib-/Lesespulenwicklung
US5032944A (en) * 1989-01-12 1991-07-16 Mitsubishi Denki Kabushiki Kaisha Membrane type magnetic head
US5236735A (en) * 1989-05-27 1993-08-17 Tdk Corporation Method of producing a thin film magnetic head
NL9001147A (nl) * 1990-05-17 1991-12-16 Philips Nv Dunnefilm magneetkop.
US5220471A (en) * 1990-08-14 1993-06-15 Tdk Corporation Air bearing slider having a longitudinal groove in surface remote from recording medium
US5059278A (en) * 1990-09-28 1991-10-22 Seagate Technology Selective chemical removal of coil seed-layer in thin film head magnetic transducer
US5173826A (en) * 1991-06-03 1992-12-22 Read-Rite Corp. Thin film head with coils of varying thickness
US5472736A (en) * 1991-06-03 1995-12-05 Read-Rite Corporation Method of making a bi-level coil for a thin film magnetic transducer
US5748414A (en) * 1994-06-24 1998-05-05 Samsung Electro-Mechanics Co., Ltd. Magnetoresistive element assembly with longitudinal bias
US6195232B1 (en) 1995-08-24 2001-02-27 Torohead, Inc. Low-noise toroidal thin film head with solenoidal coil
US5703740A (en) * 1995-08-24 1997-12-30 Velocidata, Inc. Toroidal thin film head
JP2000350212A (ja) 1999-06-04 2000-12-15 Matsushita Electric Ind Co Ltd 映像信号復号装置並びに映像信号表示システム
US7370403B1 (en) * 2000-06-06 2008-05-13 Taiwan Semiconductor Manufacturing Co., Ltd. Method of fabricating a planar spiral inductor structure having an enhanced Q value
WO2001099112A2 (en) * 2000-06-20 2001-12-27 Seagate Technology Llc Disc drive with layered write coil
US7035046B1 (en) 2002-03-19 2006-04-25 Western Digital (Fremont), Inc. System and method for minimizing thermal pole tip protrusion
US6859343B1 (en) 2002-03-19 2005-02-22 Western Digital, Inc. Hybrid diffuser for minimizing thermal pole tip protrusion and reader sensor temperature
US6980395B2 (en) * 2002-10-31 2005-12-27 International Business Machines Corporation Enhanced coplanar conductance structure for inductive heads
US6950279B2 (en) * 2003-01-30 2005-09-27 Headway Technologies, Inc. Thin-film magnetic head with thin-film coil of low resistance
US7027242B1 (en) 2004-09-23 2006-04-11 Western Digital (Fremont), Inc. Method and apparatus for measuring write-induced pole tip protrusion
JP2008165923A (ja) 2006-12-28 2008-07-17 Tdk Corp 薄膜磁気ヘッド

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564522A (en) * 1966-12-16 1971-02-16 Data Disc Inc Transducer with thin film coil and semiconductor switching
US3685144A (en) * 1967-09-18 1972-08-22 Ncr Co Method of making a magnetic transducer
DE2131096C3 (de) * 1971-06-23 1979-05-10 Transformatoren Union Ag, 7000 Stuttgart Band- oder folienartiger Stromleiter für Wicklungen von Transformatoren, Drosselspulen, Wandlern u.dgl
US3766640A (en) * 1971-12-20 1973-10-23 Ibm Method of manufacturing magnetic transducers
FR2209154B1 (xx) * 1972-07-03 1975-04-11 Cii
JPS4950914A (xx) * 1972-09-14 1974-05-17
US3829896A (en) * 1972-11-08 1974-08-13 Ibm Bias means for batch fabricated magnetic head and method of manufacture thereof
US4016519A (en) * 1976-05-14 1977-04-05 Blaupunkt-Werke Gmbh Printed circuit coils
US4130847A (en) * 1977-03-31 1978-12-19 International Business Machines Corporation Corrosion resistant thin film head assembly and method for making
DE2721452A1 (de) * 1977-05-12 1978-11-16 Siemens Ag Integrierte magnetkopfstruktur und verfahren zu ihrer herstellung

Also Published As

Publication number Publication date
CA1126402A (en) 1982-06-22
JPS638528B2 (xx) 1988-02-23
US4219854A (en) 1980-08-26
JPS5584020A (en) 1980-06-24
AU524436B2 (en) 1982-09-16
AU5295079A (en) 1980-06-26
DE2961279D1 (en) 1982-01-14
EP0012910B1 (en) 1981-11-04
EP0012910A1 (en) 1980-07-09
ES486015A1 (es) 1980-06-16
BR7908415A (pt) 1980-09-23

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