DE69029215T2 - Aufzeichnungskopf zum Optimieren der Aufzeichnung mit hoher Dichte - Google Patents

Aufzeichnungskopf zum Optimieren der Aufzeichnung mit hoher Dichte

Info

Publication number
DE69029215T2
DE69029215T2 DE69029215T DE69029215T DE69029215T2 DE 69029215 T2 DE69029215 T2 DE 69029215T2 DE 69029215 T DE69029215 T DE 69029215T DE 69029215 T DE69029215 T DE 69029215T DE 69029215 T2 DE69029215 T2 DE 69029215T2
Authority
DE
Germany
Prior art keywords
head
pole
recording
high density
recording head
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
DE69029215T
Other languages
English (en)
Other versions
DE69029215D1 (de
Inventor
Alan Lee Sidman
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.)
Quantum Corp
Original Assignee
Quantum 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 Quantum Corp filed Critical Quantum Corp
Publication of DE69029215D1 publication Critical patent/DE69029215D1/de
Application granted granted Critical
Publication of DE69029215T2 publication Critical patent/DE69029215T2/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
    • 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording
    • 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
    • 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
    • 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
    • G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same 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
    • G11B5/31—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
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/32—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying conductive, insulating or magnetic material on a magnetic film, specially adapted for a thin magnetic film
    • H01F41/34—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying conductive, insulating or magnetic material on a magnetic film, specially adapted for a thin magnetic film in patterns, e.g. by lithography

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Magnetic Heads (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Electronic Switches (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Common Mechanisms (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
DE69029215T 1989-03-28 1990-03-05 Aufzeichnungskopf zum Optimieren der Aufzeichnung mit hoher Dichte Expired - Fee Related DE69029215T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US32942989A 1989-03-28 1989-03-28

Publications (2)

Publication Number Publication Date
DE69029215D1 DE69029215D1 (de) 1997-01-09
DE69029215T2 true DE69029215T2 (de) 1997-04-30

Family

ID=23285347

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69029215T Expired - Fee Related DE69029215T2 (de) 1989-03-28 1990-03-05 Aufzeichnungskopf zum Optimieren der Aufzeichnung mit hoher Dichte

Country Status (6)

Country Link
EP (1) EP0390347B1 (de)
JP (1) JP2524242B2 (de)
AT (1) ATE145749T1 (de)
CA (1) CA2011737C (de)
DE (1) DE69029215T2 (de)
SG (1) SG49106A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676301B1 (fr) * 1991-05-07 1993-07-16 Commissariat Energie Atomique Tete magnetique d'ecriture et de lecture a largeur de poles dissymetrique.
JPH06203325A (ja) * 1992-12-28 1994-07-22 Nec Corp 薄膜磁気ヘッド
US6833976B2 (en) 2002-05-15 2004-12-21 International Business Machine Corporation Thin film magnetic recording inductive write head with laminated write gap

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4219855A (en) * 1978-12-21 1980-08-26 International Business Machines Corporation Thin film magnetic head
JPS58111114A (ja) * 1981-12-23 1983-07-02 Fujitsu Ltd 薄膜磁気ヘツド
US4621045A (en) * 1985-06-03 1986-11-04 Motorola, Inc. Pillar via process
JPS62204419A (ja) * 1986-03-03 1987-09-09 Fujitsu Ltd 薄膜磁気ヘツドの製造方法
JPS62204420A (ja) * 1986-03-03 1987-09-09 Fujitsu Ltd 薄膜磁気ヘツドの製造方法
JPS62219218A (ja) * 1986-03-19 1987-09-26 Fujitsu Ltd 薄膜磁気ヘツドの製造方法
JPS6364613A (ja) * 1986-09-04 1988-03-23 Fujitsu Ltd 薄膜磁気ヘツドの製造方法
DE3806171A1 (de) * 1988-02-26 1989-09-07 Siemens Ag Duennfilm-magnetkopf mit schichtweisem aufbau zur longitudinalen magnetisierung
EP0351048A3 (de) * 1988-07-11 1992-04-08 Digital Equipment Corporation Aufzeichnungskopf zum optimieren der Aufzeichnung hoher Dichte
US4970616A (en) * 1988-08-17 1990-11-13 Digital Equipment Corporation Recording head to minimize undershoots in readback pulses
JPH0268704A (ja) * 1988-09-02 1990-03-08 Yamaha Corp 薄膜ヘッドの製造方法
CA1323695C (en) * 1988-12-30 1993-10-26 Shyam Chandra Das Recording heads with side shields

Also Published As

Publication number Publication date
SG49106A1 (en) 1998-05-18
CA2011737A1 (en) 1990-09-28
DE69029215D1 (de) 1997-01-09
EP0390347A2 (de) 1990-10-03
EP0390347B1 (de) 1996-11-27
EP0390347A3 (de) 1993-03-17
ATE145749T1 (de) 1996-12-15
CA2011737C (en) 1994-08-16
JP2524242B2 (ja) 1996-08-14
JPH02285503A (ja) 1990-11-22

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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