ZA7906366B - Thin film magnetic transducers - Google Patents

Thin film magnetic transducers

Info

Publication number
ZA7906366B
ZA7906366B ZA00796366A ZA7906366A ZA7906366B ZA 7906366 B ZA7906366 B ZA 7906366B ZA 00796366 A ZA00796366 A ZA 00796366A ZA 7906366 A ZA7906366 A ZA 7906366A ZA 7906366 B ZA7906366 B ZA 7906366B
Authority
ZA
South Africa
Prior art keywords
thin film
film magnetic
magnetic transducers
transducers
thin
Prior art date
Application number
ZA00796366A
Inventor
W Nystrom
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
Priority to US05/972,104 priority Critical patent/US4190872A/en
Application filed by Ibm filed Critical Ibm
Publication of ZA7906366B publication Critical patent/ZA7906366B/en

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/31Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109Details
    • G11B5/313Disposition of layers
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/31Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109Details
    • G11B5/3116Shaping 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
ZA00796366A 1978-12-21 1979-11-23 Thin film magnetic transducers ZA7906366B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/972,104 US4190872A (en) 1978-12-21 1978-12-21 Thin film inductive transducer

Publications (1)

Publication Number Publication Date
ZA7906366B true ZA7906366B (en) 1980-11-26

Family

ID=25519165

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00796366A ZA7906366B (en) 1978-12-21 1979-11-23 Thin film magnetic transducers

Country Status (9)

Country Link
US (1) US4190872A (en)
EP (1) EP0012912B1 (en)
JP (1) JPH034964B2 (en)
AU (1) AU526069B2 (en)
BR (1) BR7908411A (en)
CA (1) CA1127298A (en)
DE (1) DE2961724D1 (en)
ES (1) ES487049A1 (en)
ZA (1) ZA7906366B (en)

Families Citing this family (71)

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FR2455330B1 (en) * 1979-04-25 1983-06-17 Cii Honeywell Bull
US4353102A (en) * 1979-07-04 1982-10-05 Matsushita Electric Industrial Co., Ltd. Thin-film magnetic head
US4295173A (en) * 1979-10-18 1981-10-13 International Business Machines Corporation Thin film inductive transducer
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
JPS57117117A (en) * 1981-01-09 1982-07-21 Matsushita Electric Ind Co Ltd Thin film magnetic head
US4458279A (en) * 1981-03-23 1984-07-03 Magnex Corporation Thin film transducer and method of making same
JPH0544087B2 (en) * 1981-07-27 1993-07-05 Hitachi Ltd
JPS6118249B2 (en) * 1981-07-30 1986-05-12 Fujitsu Ltd
US4404609A (en) * 1981-10-30 1983-09-13 International Business Machines Corporation Thin film inductive transducer for perpendicular recording
JPS58105025U (en) * 1982-01-07 1983-07-16
US4458280A (en) * 1982-01-18 1984-07-03 International Business Machines Corporation Servo writing transducer design and writing method
US4490766A (en) * 1982-03-22 1984-12-25 International Business Machines Corporation Magnetic recording disk cleaning using controlled actuator motion
JPH0520802B2 (en) * 1982-10-15 1993-03-22 Hitachi Ltd
JPH0223924B2 (en) * 1982-10-15 1990-05-25 Denshi Keisanki Kippon Gijutsu
US4581663A (en) * 1982-11-02 1986-04-08 Nec Corporation Buried servo recording system having dual transducers
US4593334A (en) * 1983-05-02 1986-06-03 International Business Machines Corporation Thin film transducer
US4589042A (en) * 1983-06-27 1986-05-13 International Business Machines Corporation Composite thin film transducer head
FR2559294B1 (en) * 1984-02-03 1988-08-12 Commissariat Energie Atomique New magnetic head for writing and reading for perpendicular recording and process for its manufacture
EP0166890B1 (en) * 1984-05-04 1988-12-14 Siemens Aktiengesellschaft Thin-layer double-gap magnetic head for a perpendicularly magnetized recording medium
KR940004986B1 (en) * 1984-08-27 1994-06-09 미다 가쓰시게 Manufacturing method of magnetic substance and magnetic head using it
US4923574A (en) * 1984-11-13 1990-05-08 Uri Cohen Method for making a record member with a metallic antifriction overcoat
EP0186032B1 (en) * 1984-12-21 1989-05-24 Siemens Aktiengesellschaft Thin-film magnetic head for a recording medium to be perpendicularly magnetized
US4853815A (en) * 1984-12-21 1989-08-01 Siemens Aktiengesellschaft Magnetic thin-film head on a nonmagnetic substrate for vertical mangetization
DE3501810C2 (en) * 1985-01-21 1990-08-09 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
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
US4675986A (en) * 1985-07-29 1987-06-30 International Business Machines Electrical lapping guide for controlling the batch fabrication of thin film magnetic transducers
EP0218445A3 (en) * 1985-10-01 1989-08-30 Sony Corporation Thin film magnetic heads
US4740855A (en) * 1985-10-18 1988-04-26 Siemens Aktiengesellschaft Magnetic thin-film head having a main and an auxiliary pole for vertical magnetization
EP0232505A1 (en) * 1985-12-20 1987-08-19 Siemens Aktiengesellschaft Magnetic storage device with a recording medium to be magnetized perpendicularly
JPS62173607A (en) * 1986-01-27 1987-07-30 Hitachi Ltd Thin film magnetic head
US4819111A (en) * 1986-08-29 1989-04-04 Magnetic Peripheral Inc. Thin film head with reduced cross section in the core for causing magnetic saturation in the leading leg's throat area
EP0320687A1 (en) * 1987-12-11 1989-06-21 Siemens Aktiengesellschaft Thin film magnetic head for vertical magnetization
US4839197A (en) * 1988-04-13 1989-06-13 Storage Technology Corporation Process for fabricating thin film magnetic recording heads having precision control of the width tolerance of the upper pole tip
EP0387364A1 (en) * 1989-03-13 1990-09-19 Siemens Aktiengesellschaft Thin film magnetic head unit
US5236735A (en) * 1989-05-27 1993-08-17 Tdk Corporation Method of producing a thin film magnetic head
US5023738A (en) * 1989-12-18 1991-06-11 Seagate Technology, Inc. Corrosion resistant magnetic recording read
NL9001147A (en) * 1990-05-17 1991-12-16 Philips Nv Thin-film magnetic head.
EP0459426B1 (en) * 1990-05-31 1996-12-11 Sony Corporation Thin film magnetic head
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
US5240740A (en) * 1990-11-26 1993-08-31 Digital Equipment Corporation Method of making a thin film head with minimized secondary pulses
JPH04214205A (en) * 1990-12-12 1992-08-05 Fuji Electric Co Ltd Thin-film magnetic head and its production
US5264981A (en) * 1991-08-14 1993-11-23 International Business Machines Corporation Multilayered ferromagnetic film and magnetic head employing the same
DE69229906D1 (en) * 1991-12-18 1999-10-07 Hewlett Packard Co Inductive thin film transducer with improved writing skills
US5305165A (en) * 1991-12-24 1994-04-19 International Business Machines Corporation Tribo-attractive contact data storage system
JP2544563B2 (en) * 1992-06-19 1996-10-16 株式会社日立製作所 Thin-film magnetic head and magnetic recording apparatus
JP2550829B2 (en) * 1992-06-19 1996-11-06 株式会社日立製作所 Thin-film magnetic head and magnetic recording apparatus
US5470491A (en) * 1992-07-03 1995-11-28 Mitsubishi Denki Kabushiki Kaisha Process for producing a thin-film magnetic head having an insulation formed of a ladder-type silicone resin
JPH0676238A (en) * 1992-07-08 1994-03-18 Fuji Electric Co Ltd Thin-film magnetic head
US5326429A (en) * 1992-07-21 1994-07-05 Seagate Technology, Inc. Process for making studless thin film magnetic head
US5820770A (en) 1992-07-21 1998-10-13 Seagate Technology, Inc. Thin film magnetic head including vias formed in alumina layer and process for making the same
JP2721783B2 (en) * 1992-08-19 1998-03-04 インターナショナル・ビジネス・マシーンズ・コーポレイション The combination system and its manufacturing method of the thin film magnetic head transducer / suspension unit
JPH06168556A (en) 1992-08-25 1994-06-14 Internatl Business Mach Corp <Ibm> Processing method for combined assembly of converter and suspension part
US5945007A (en) * 1992-10-20 1999-08-31 Cohen; Uri Method for etching gap-vias in a magnetic thin film head and product
US5621595A (en) * 1992-10-20 1997-04-15 Cohen; Uri Pinched-gap magnetic recording thin film head
CN1058799C (en) * 1993-01-08 2000-11-22 国际商业机器公司 Thin film magnetic transducer and suspension rack assemblies, and its mfg. method and magnetic disk driving assembly
JPH0773412A (en) * 1993-06-24 1995-03-17 Sanyo Electric Co Ltd The thin-film magnetic head
US5452166A (en) * 1993-10-01 1995-09-19 Applied Magnetics Corporation Thin film magnetic recording head for minimizing undershoots and a method for manufacturing the same
US5462636A (en) * 1993-12-28 1995-10-31 International Business Machines Corporation Method for chemically scribing wafers
US5452164A (en) * 1994-02-08 1995-09-19 International Business Machines Corporation Thin film magnetic write head
US5710745A (en) * 1995-04-07 1998-01-20 Discovision Associates Assembly having flux-directing return yoke for magneto-optical drive
US5703740A (en) * 1995-08-24 1997-12-30 Velocidata, Inc. Toroidal thin film head
US6151194A (en) * 1999-03-04 2000-11-21 Storage Technology Corporation Thin film inductive transducer with alumina gap positioned over coils
US6304414B1 (en) 1999-07-20 2001-10-16 Read-Rite Corporation Thin film magnetic write head having an ultra-low stack height
JP2001319312A (en) 2000-05-10 2001-11-16 Tdk Corp Thin-film coil, its manufacturing method, thin-film magnetic head and its manufacturing method
JP2002015405A (en) * 2000-06-28 2002-01-18 Tdk Corp Thin film magnetic head and method of manufacture
US7100266B2 (en) * 2001-05-16 2006-09-05 Seagate Technology Llc Method of forming a beveled writing pole of a perpendicular writing element
US6906893B2 (en) 2002-10-08 2005-06-14 Hitachi Global Storage Technologies Magnetic head coil and structure for protecting same during pole notch processing
JP4990866B2 (en) * 2008-10-08 2012-08-01 昭和電工株式会社 Magnetic recording medium manufacturing method and magnetic recording / reproducing apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344237A (en) * 1967-09-26 Desposited film transducing apparatus and method op producing the apparatus
CH405426A (en) * 1961-12-21 1966-01-15 Ibm Magnetic head for recording and reading of digital signals
US3700827A (en) * 1970-01-31 1972-10-24 Nippon Electric Co Magnetic head including thin magnetic film separated by a gap spacer
JPS5038325B1 (en) * 1970-12-25 1975-12-09
FR2191186B1 (en) * 1972-07-03 1976-01-16 Inf Ci Interna Fr
FR2297475B1 (en) * 1975-01-10 1977-07-08 Cii
US4078300A (en) * 1975-01-10 1978-03-14 Compagnie Internationale Pour L'informatique Method of making an integrated magnetic head having pole-pieces of a reduced frontal width

Also Published As

Publication number Publication date
EP0012912B1 (en) 1981-12-30
US4190872A (en) 1980-02-26
CA1127298A1 (en)
EP0012912A1 (en) 1980-07-09
AU526069B2 (en) 1982-12-16
AU5295179A (en) 1980-06-26
CA1127298A (en) 1982-07-06
DE2961724D1 (en) 1982-02-18
JPS5584019A (en) 1980-06-24
BR7908411A (en) 1980-09-23
JPH034964B2 (en) 1991-01-24
ES487049A1 (en) 1980-09-16

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