GB2003647A - Improvements in thin film magnetic recording heads - Google Patents

Improvements in thin film magnetic recording heads

Info

Publication number
GB2003647A
GB2003647A GB7834421A GB7834421A GB2003647A GB 2003647 A GB2003647 A GB 2003647A GB 7834421 A GB7834421 A GB 7834421A GB 7834421 A GB7834421 A GB 7834421A GB 2003647 A GB2003647 A GB 2003647A
Authority
GB
United Kingdom
Prior art keywords
thin film
head
magnetic
pole piece
slider
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.)
Granted
Application number
GB7834421A
Other versions
GB2003647B (en
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.)
Magnex Corp
Original Assignee
Magnex 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
Priority claimed from US05/830,104 external-priority patent/US4489484A/en
Application filed by Magnex Corp filed Critical Magnex Corp
Publication of GB2003647A publication Critical patent/GB2003647A/en
Application granted granted Critical
Publication of GB2003647B publication Critical patent/GB2003647B/en
Expired 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
    • G11B5/33—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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/1871—Shaping or contouring of the transducing or guiding surface
    • 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
    • G11B5/3103—Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or housing
    • 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
    • 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
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • 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
    • G11B5/127—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
    • 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
    • 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
    • G11B5/40—Protective measures on heads, e.g. against excessive temperature 

Landscapes

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

Abstract

In the manufacture of a thin-film type magnetic read/write head combined with a supporting slider, the elements forming the head are deposited on a substrate of thickness equal to the required slider length. In batch fabrication the substrate wafer is subjected to a series of thin film deposition, etching and plating operations to form a plurality of thin film magnetic heads thereon. Thereafter, the substrate wafer is diced around each thin film magnetic transducer head with subsequent finishing and polishing to requisite shape. Each head may have a magnetoresistive read stripe and a bias layer between a magnetic shield and a first pole piece and a write conductor between the first pole piece and a trailing edge pole piece. The shield and both poles are each formed by layers of insulation alternating with magnetic layers, the layer thicknesses of the trailing pole being progressively reduced to shape the write field. At least the flying surface of each slider/head assembly may be coated with passivation material.
GB7834421A 1977-09-02 1978-08-24 Thin film magnetic recording heads Expired GB2003647B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/830,104 US4489484A (en) 1977-09-02 1977-09-02 Method of making thin film magnetic recording heads
US90925878A 1978-05-24 1978-05-24

Publications (2)

Publication Number Publication Date
GB2003647A true GB2003647A (en) 1979-03-14
GB2003647B GB2003647B (en) 1982-05-06

Family

ID=27125321

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7834421A Expired GB2003647B (en) 1977-09-02 1978-08-24 Thin film magnetic recording heads

Country Status (6)

Country Link
JP (1) JPS5449109A (en)
CA (1) CA1134945A (en)
DE (1) DE2838263A1 (en)
FR (1) FR2402270B1 (en)
GB (1) GB2003647B (en)
NL (1) NL7809047A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064786A2 (en) * 1981-05-01 1982-11-17 Koninklijke Philips Electronics N.V. Magnetic sensor and magnetically permeable component for a magnetic sensor
EP0080373A1 (en) * 1981-11-23 1983-06-01 Xerox Corporation Method of forming thin film magnetic head arrays
GB2146482A (en) * 1983-09-09 1985-04-17 Sharp Kk Thin film magnetic head
GB2175735A (en) * 1985-04-26 1986-12-03 Sharp Kk Thin film magnetic head
EP0634739A2 (en) * 1993-07-14 1995-01-18 Sony Corporation Thin-film magnetic head, magnetoresistance effect magnetic head and composite magnetic head
EP0690438A3 (en) * 1994-06-30 1996-06-19 Sony Corp Magneto-resistance effect thin-film magnetic head
US7609478B2 (en) * 2006-03-28 2009-10-27 Seagate Technology Llc Magnetic writer pole with a graded magnetic moment

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251841A (en) * 1979-06-01 1981-02-17 International Business Machines Corporation Magnetic head slider assembly
NL7908611A (en) * 1979-11-28 1981-07-01 Philips Nv INTEGRATED MAGNETIC HEAD CONSTRUCTION.
US4648087A (en) * 1984-06-28 1987-03-03 International Business Machines Corporation Capacitive sensing employing thin film inductors

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1307886A (en) * 1970-05-12 1973-02-21 Ibm Magnetic transducing head
FR2165206A5 (en) * 1971-12-22 1973-08-03 Cii
FR2191186B1 (en) * 1972-07-03 1976-01-16 Inf Ci Interna Fr
FR2205701B1 (en) * 1972-11-07 1977-08-05 Cii
FR2264350B1 (en) * 1974-03-11 1978-09-29 Cii
JPS50143416A (en) * 1974-05-07 1975-11-18
NL7406962A (en) * 1974-05-24 1975-11-26 Philips Nv MAGNETIC HEAD USING A MAGNETIC FIELD SENSITIVE ELEMENT AND METHOD FOR MANUFACTURING THE SAME.
US3908194A (en) * 1974-08-19 1975-09-23 Ibm Integrated magnetoresistive read, inductive write, batch fabricated magnetic head
JPS51131310A (en) * 1975-05-08 1976-11-15 Nippon Telegr & Teleph Corp <Ntt> Method of manufacturing magnetic field
JPS51151115A (en) * 1975-06-20 1976-12-25 Hitachi Ltd Manufacturing method of thin film integrated magnetic head
JPS5236016A (en) * 1975-09-17 1977-03-19 Hitachi Ltd Manufacturing method for floating magnetic head
US4130847A (en) * 1977-03-31 1978-12-19 International Business Machines Corporation Corrosion resistant thin film head assembly and method for making
JPS5884636A (en) * 1981-11-16 1983-05-20 Mazda Motor Corp Composition for coated sand
JPS5927195A (en) * 1982-08-06 1984-02-13 Mitsubishi Heavy Ind Ltd Repair of damaged tube

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064786A2 (en) * 1981-05-01 1982-11-17 Koninklijke Philips Electronics N.V. Magnetic sensor and magnetically permeable component for a magnetic sensor
EP0064786A3 (en) * 1981-05-01 1983-01-19 Koninklijke Philips Electronics N.V. Magnetic sensor and magnetically permeable component for a magnetic sensor
EP0080373A1 (en) * 1981-11-23 1983-06-01 Xerox Corporation Method of forming thin film magnetic head arrays
GB2146482A (en) * 1983-09-09 1985-04-17 Sharp Kk Thin film magnetic head
GB2175735B (en) * 1985-04-26 1989-06-28 Sharp Kk Thin film magnetic head
US4789910A (en) * 1985-04-26 1988-12-06 Sharp Kabushiki Kaisha Thin film magnetic head with an application type silicon dioxide film
GB2175735A (en) * 1985-04-26 1986-12-03 Sharp Kk Thin film magnetic head
EP0634739A2 (en) * 1993-07-14 1995-01-18 Sony Corporation Thin-film magnetic head, magnetoresistance effect magnetic head and composite magnetic head
EP0634739A3 (en) * 1993-07-14 1997-06-25 Sony Corp Thin-film magnetic head, magnetoresistance effect magnetic head and composite magnetic head.
US5872691A (en) * 1993-07-14 1999-02-16 Sony Corporation Thin film magnetic head, magnetoresistance effect magnetic head and composite magnetic head
EP0690438A3 (en) * 1994-06-30 1996-06-19 Sony Corp Magneto-resistance effect thin-film magnetic head
US5617276A (en) * 1994-06-30 1997-04-01 Sony Corporation Magneto-resistance effect thin-film magnetic head having a laminated flux guide of permalloy and titanium films
US7609478B2 (en) * 2006-03-28 2009-10-27 Seagate Technology Llc Magnetic writer pole with a graded magnetic moment

Also Published As

Publication number Publication date
FR2402270B1 (en) 1987-11-20
NL7809047A (en) 1979-03-06
DE2838263A1 (en) 1979-03-08
GB2003647B (en) 1982-05-06
CA1134945A (en) 1982-11-02
FR2402270A1 (en) 1979-03-30
JPS5449109A (en) 1979-04-18

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Legal Events

Date Code Title Description
PG Patent granted