FR2455330A1 - Dispositif magnetique de transduction a magnetoresistances - Google Patents

Dispositif magnetique de transduction a magnetoresistances

Info

Publication number
FR2455330A1
FR2455330A1 FR7910562A FR7910562A FR2455330A1 FR 2455330 A1 FR2455330 A1 FR 2455330A1 FR 7910562 A FR7910562 A FR 7910562A FR 7910562 A FR7910562 A FR 7910562A FR 2455330 A1 FR2455330 A1 FR 2455330A1
Authority
FR
France
Prior art keywords
magnetic
thin
layers
magnetic resistance
writing
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
FR7910562A
Other languages
English (en)
Other versions
FR2455330B1 (fr
Inventor
Jean-Pierre Lazzari
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.)
Bull SA
Original Assignee
Bull SA
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 Bull SA filed Critical Bull SA
Priority to FR7910562A priority Critical patent/FR2455330A1/fr
Priority to US06/104,852 priority patent/US4315291A/en
Priority to NL8001023A priority patent/NL8001023A/nl
Priority to SE8003001A priority patent/SE8003001L/
Priority to IT8021629A priority patent/IT8021629A0/it
Priority to GB8013491A priority patent/GB2047943B/en
Priority to JP5443980A priority patent/JPS55146628A/ja
Priority to DE19803016105 priority patent/DE3016105A1/de
Publication of FR2455330A1 publication Critical patent/FR2455330A1/fr
Application granted granted Critical
Publication of FR2455330B1 publication Critical patent/FR2455330B1/fr
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

DISPOSITIF MAGNETIQUE DE TRANSDUCTION DE LECTURE ETOU ECRITURE D'INFORMATIONS CONTENUES SUR UN SUPPORT MAGNETIQUE COMPRENANT: -UN CIRCUIT MAGNETIQUE FORME DE DEUX COUCHES MINCES MAGNETIQUES SUPERPOSEES COUPLEES MAGNETIQUEMENT A UNE EXTREMITE, ET FORMANT L'ENTREFER A L'AUTRE EXTREMITE; -UN BOBINAGE FORME, ENTRE LESDITES COUCHES MINCES MAGNETIQUES DE COUCHES MINCES CONDUCTRICES SEPAREES PAR DES COUCHES MINCES ISOLANTES. LE DISPOSITIF MAGNETIQUE EST CARACTERISE EN CE QUE AU MOINS L'UNE DES COUCHES MINCES CONDUCTRICES COMPREND AU MOINS UNE MAGNETORESISTANCE. APPLICABLE A LA LECTURE ETOU L'ECRITURE D'INFORMATIONS SUR DISQUES ET BANDES MAGNETIQUES.
FR7910562A 1979-04-25 1979-04-25 Dispositif magnetique de transduction a magnetoresistances Granted FR2455330A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FR7910562A FR2455330A1 (fr) 1979-04-25 1979-04-25 Dispositif magnetique de transduction a magnetoresistances
US06/104,852 US4315291A (en) 1979-04-25 1979-12-18 Magnetic transduction device with magnetoresistances
NL8001023A NL8001023A (nl) 1979-04-25 1980-02-20 Opneem- en afspeelkop voor magnetische registraties, uitgevoerd met magnetoweerstandsorganen.
SE8003001A SE8003001L (sv) 1979-04-25 1980-04-22 Magnetanordning for omvandling av en magnetoresistans
IT8021629A IT8021629A0 (it) 1979-04-25 1980-04-24 Dispositivo magnetico di trasduzione a magnetoresistenze.
GB8013491A GB2047943B (en) 1979-04-25 1980-04-24 Combined inductive and magnetoresistive transducer
JP5443980A JPS55146628A (en) 1979-04-25 1980-04-25 Magnetic converter
DE19803016105 DE3016105A1 (de) 1979-04-25 1980-04-25 Magnetische wandlervorrichtung zum lesen und/oder schreiben von informationen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7910562A FR2455330A1 (fr) 1979-04-25 1979-04-25 Dispositif magnetique de transduction a magnetoresistances

Publications (2)

Publication Number Publication Date
FR2455330A1 true FR2455330A1 (fr) 1980-11-21
FR2455330B1 FR2455330B1 (fr) 1983-06-17

Family

ID=9224749

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7910562A Granted FR2455330A1 (fr) 1979-04-25 1979-04-25 Dispositif magnetique de transduction a magnetoresistances

Country Status (8)

Country Link
US (1) US4315291A (fr)
JP (1) JPS55146628A (fr)
DE (1) DE3016105A1 (fr)
FR (1) FR2455330A1 (fr)
GB (1) GB2047943B (fr)
IT (1) IT8021629A0 (fr)
NL (1) NL8001023A (fr)
SE (1) SE8003001L (fr)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418372A (en) * 1979-08-02 1983-11-29 Hitachi, Ltd. Magnetic rotary encoder
US4394621A (en) * 1980-12-08 1983-07-19 International Business Machines Corporation Electronic velocity measurement especially for self-clocking write head
JPS5924403A (ja) * 1982-07-30 1984-02-08 Toshiba Corp 回転型磁気ヘツド装置
US4504880A (en) * 1982-08-09 1985-03-12 International Business Machines Corporation Integrated magnetic recording head assembly including an inductive write subassembly and a magnetoresistive read subassembly
DE3390321T1 (de) * 1982-11-11 1985-01-24 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Dünnfilm-Magnetkopf
US4547824A (en) * 1982-12-17 1985-10-15 International Business Machines Corporation Dual biasing for integrated inductive MR head
US4535375A (en) * 1983-01-14 1985-08-13 Magnetic Peripherals, Inc. Magnetoresistive head
US4580175A (en) * 1983-01-14 1986-04-01 Magnetic Peripherals, Inc. Endless, folded magnetoresistive head
US4599668A (en) * 1983-06-15 1986-07-08 Eastman Kodak Company Inductively-coupled, thin-film M-R head
GB2143071B (en) * 1983-07-09 1987-10-28 Magnetic Components Limited Magnetoresistive transducers
JPS60197914A (ja) * 1984-03-20 1985-10-07 Olympus Optical Co Ltd 垂直磁化型磁気ヘツド
EP0186032B1 (fr) * 1984-12-21 1989-05-24 Siemens Aktiengesellschaft Tête magnétique à film mince pour un milieu d'enregistrement à magnétiser perpendiculairement
US4698711A (en) * 1985-10-02 1987-10-06 International Business Machines Corporation Simplified, shielded twin-track read/write head structure
US4694368A (en) * 1986-01-10 1987-09-15 Read-Rite Corporation Thin film magnetic head with three superimposed coils
JPS62205511A (ja) * 1986-03-05 1987-09-10 Fuji Photo Film Co Ltd 磁気ヘツド特性測定装置
US4799119A (en) * 1986-09-10 1989-01-17 International Business Machines Corporation Flexible circuit magnetic core winding for a core member
JPH0512628A (ja) * 1991-07-02 1993-01-22 Sony Corp 複合型薄膜ヘツド
US5323285A (en) * 1992-06-23 1994-06-21 Eastman Kodak Company Shielded dual element magnetoresistive reproduce head exhibiting high density signal amplification
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
US5326429A (en) * 1992-07-21 1994-07-05 Seagate Technology, Inc. Process for making studless thin film magnetic head
US5621595A (en) * 1992-10-20 1997-04-15 Cohen; Uri Pinched-gap magnetic recording thin film head
US5945007A (en) 1992-10-20 1999-08-31 Cohen; Uri Method for etching gap-vias in a magnetic thin film head and product
JP2924630B2 (ja) * 1993-09-20 1999-07-26 富士通株式会社 磁気記憶装置
FR2724481B1 (fr) * 1994-09-13 1996-10-18 Commissariat Energie Atomique Tete magnetique planaire a magnetoresistance multicouche longitudinale
US5703740A (en) * 1995-08-24 1997-12-30 Velocidata, Inc. Toroidal thin film head
US6195232B1 (en) 1995-08-24 2001-02-27 Torohead, Inc. Low-noise toroidal thin film head with solenoidal coil
US6496330B1 (en) * 1999-09-09 2002-12-17 Read-Rite Corporation Magnetic write head having a splitcoil structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB966438A (en) * 1961-11-24 1964-08-12 Ampex Improvements in or relating to magnetic transducing systems
FR2165974A1 (fr) * 1971-12-27 1973-08-10 Ibm
FR2203125A1 (fr) * 1972-10-11 1974-05-10 Ibm
FR2254849A1 (fr) * 1973-12-12 1975-07-11 Ibm

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921217A (en) * 1971-12-27 1975-11-18 Ibm Three-legged magnetic recording head using a magnetorestive element
US4190872A (en) * 1978-12-21 1980-02-26 International Business Machines Corporation Thin film inductive transducer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB966438A (en) * 1961-11-24 1964-08-12 Ampex Improvements in or relating to magnetic transducing systems
FR2165974A1 (fr) * 1971-12-27 1973-08-10 Ibm
FR2203125A1 (fr) * 1972-10-11 1974-05-10 Ibm
FR2254849A1 (fr) * 1973-12-12 1975-07-11 Ibm

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ABJP1977 *

Also Published As

Publication number Publication date
NL8001023A (nl) 1980-10-28
DE3016105A1 (de) 1980-11-06
IT8021629A0 (it) 1980-04-24
GB2047943B (en) 1982-12-15
SE8003001L (sv) 1980-10-26
JPS55146628A (en) 1980-11-15
GB2047943A (en) 1980-12-03
FR2455330B1 (fr) 1983-06-17
US4315291A (en) 1982-02-09

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Legal Events

Date Code Title Description
ST Notification of lapse