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FR2401482A1 - Tete magnetique de lecture/ecriture et d'effacement a effet tunnel - Google Patents

Tete magnetique de lecture/ecriture et d'effacement a effet tunnel

Info

Publication number
FR2401482A1
FR2401482A1 FR7819406A FR7819406A FR2401482A1 FR 2401482 A1 FR2401482 A1 FR 2401482A1 FR 7819406 A FR7819406 A FR 7819406A FR 7819406 A FR7819406 A FR 7819406A FR 2401482 A1 FR2401482 A1 FR 2401482A1
Authority
FR
France
Prior art keywords
erasure
magnetic
write
magnetic read
tunnel effect
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
FR7819406A
Other languages
English (en)
Other versions
FR2401482B1 (fr
Inventor
Daniel O Castrodale
Jeffrey L Lovgren
Ralph A Russel
Karl A Shidler
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2401482A1 publication Critical patent/FR2401482A1/fr
Application granted granted Critical
Publication of FR2401482B1 publication Critical patent/FR2401482B1/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
    • G11B5/265—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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • 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
    • G11B5/17—Construction or disposition of windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
  • Digital Magnetic Recording (AREA)

Abstract

Tête magnétique à effacement dit << tunnel >>. La tête magnétique comporte un entrefer de lecture/écriture 28 et, de part et d'autre de ce dernier et décalés par rapport à lui, deux entrefers d'effacement 36 qui assurent l'effacement des bords de la piste lue ou écrite par 28. Les circuits magnétiques de chaque noyau d'effacement B présentent un important entrefer 64 entouré par une bobine unique de commande 38. Cette disposition permet de réduire considérablement les fuites du flux d'effacement vers le noyau d'écriture A. Tête magnétique utilisable notamment avec les disques magnétiques souples.
FR7819406A 1977-07-21 1978-06-20 Tete magnetique de lecture/ecriture et d'effacement a effet tunnel Granted FR2401482A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/817,755 US4110804A (en) 1977-07-21 1977-07-21 Read/write and tunnel erase magnetic head assembly

Publications (2)

Publication Number Publication Date
FR2401482A1 true FR2401482A1 (fr) 1979-03-23
FR2401482B1 FR2401482B1 (fr) 1983-07-22

Family

ID=25223807

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7819406A Granted FR2401482A1 (fr) 1977-07-21 1978-06-20 Tete magnetique de lecture/ecriture et d'effacement a effet tunnel

Country Status (6)

Country Link
US (1) US4110804A (fr)
JP (1) JPS6031007B2 (fr)
DE (1) DE2829195A1 (fr)
FR (1) FR2401482A1 (fr)
GB (1) GB1575159A (fr)
IT (1) IT1112277B (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191980A (en) * 1978-12-29 1980-03-04 International Business Machines Corporation Transducers with tapered edge profiles and assembly thereof
US4300179A (en) * 1979-09-04 1981-11-10 Minnesota Mining And Manufacturing Co. Composite magnetic head with multitrack support structure
US4276574A (en) * 1979-12-06 1981-06-30 International Business Machines Corporation Read/write and tunnel erase magnetic head assembly
JPS56156920A (en) * 1980-04-30 1981-12-03 Toshiba Corp Composite magnetic head and its production
US4367505A (en) * 1980-09-29 1983-01-04 Xerox Corporation Magnetic head assembly with skewed read/write gap
JPS5788509A (en) * 1980-11-20 1982-06-02 Ibm Protective device for data of magnetic recording device
JPS5860423A (ja) * 1981-10-07 1983-04-09 Hitachi Metals Ltd 磁気ヘツド装置
US4642719A (en) * 1982-02-18 1987-02-10 Hitachi Metals, Ltd. Magnetic head assembly
JPS595415A (ja) * 1982-07-01 1984-01-12 Alps Electric Co Ltd 磁気ヘツド
EP0106533A3 (fr) * 1982-09-13 1984-08-08 Applied Magnetics Magnetic Head Division Corporation Assemblage de tête magnétique pour disque souple
JPS5965922A (ja) * 1982-10-07 1984-04-14 Sumitomo Special Metals Co Ltd 磁気ヘツド組立体
JPS6016312U (ja) * 1983-07-13 1985-02-04 アルプス電気株式会社 磁気ヘツドユニツト
JPS6031006U (ja) * 1983-08-09 1985-03-02 株式会社　樫村用品製作所 車輛用標示灯
JPS6031005U (ja) * 1983-08-09 1985-03-02 株式会社　樫村用品製作所 車輛用標示灯
JPS6085713U (ja) * 1983-11-17 1985-06-13 アルプス電気株式会社 磁気ヘツド
US4748527A (en) * 1984-10-30 1988-05-31 Kabushiki Kaisha Toshiba Magnetic head device with back core integral in holder shell
KR900000627B1 (ko) * 1985-03-22 1990-02-01 알프스 덴기 가부시기가이샤 복합형 자기헤드 및 그 제조방법
JPS613509U (ja) * 1985-05-30 1986-01-10 三菱電機株式会社 磁気ヘツド
JPS627676U (fr) * 1985-06-26 1987-01-17
US4849841A (en) * 1987-04-10 1989-07-18 Irwin Magnetic Systems, Inc. Transducer head core structure with recessed magnetic closures
US4736122A (en) * 1987-04-15 1988-04-05 Echlin Inc. Read head for Wiegand wire
US5055957A (en) * 1989-06-19 1991-10-08 International Business Machines Corporation Method of making low wear glass for magnetic heads
DE4121390C2 (de) * 1991-06-28 1994-10-20 Bosch Gmbh Robert Verfahren zum Herstellen einer freitragenden Dickschichtstruktur
JP2586802B2 (ja) * 1993-10-12 1997-03-05 日本電気株式会社 磁気記録・再生装置
US6594112B1 (en) 2000-01-05 2003-07-15 Seagate Technology Llc Magnetic recording head with a precision throatheight-defining structure
US8385018B2 (en) 2009-11-03 2013-02-26 International Business Machines Corporation Magnetic writer having multiple gaps with more uniform magnetic fields across the gaps

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946859A (en) * 1955-09-14 1960-07-26 Loewe Siegmund Magnetic recording heads
FR1351464A (fr) * 1961-11-24 1964-02-07 Ibm Tête magnétique à enregistrement sur piste étroite - lecture sur piste large
DE1210579B (de) * 1961-05-10 1966-02-10 Telefunken Patent Magnetkopfanordnung mit zwei Folgesystemen, die je einen vorderen Arbeitsluftspalt und einen rueckwaertigen Luftspalt aufweisen
FR2240495A1 (fr) * 1973-08-10 1975-03-07 Ibm

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810244A (en) * 1970-09-14 1974-05-07 Canon Kk Cross type magnetic head

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946859A (en) * 1955-09-14 1960-07-26 Loewe Siegmund Magnetic recording heads
DE1210579B (de) * 1961-05-10 1966-02-10 Telefunken Patent Magnetkopfanordnung mit zwei Folgesystemen, die je einen vorderen Arbeitsluftspalt und einen rueckwaertigen Luftspalt aufweisen
FR1351464A (fr) * 1961-11-24 1964-02-07 Ibm Tête magnétique à enregistrement sur piste étroite - lecture sur piste large
FR2240495A1 (fr) * 1973-08-10 1975-03-07 Ibm

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/74 *

Also Published As

Publication number Publication date
JPS6031007B2 (ja) 1985-07-19
IT7825055A0 (it) 1978-06-28
US4110804A (en) 1978-08-29
FR2401482B1 (fr) 1983-07-22
GB1575159A (en) 1980-09-17
JPS5422816A (en) 1979-02-21
DE2829195A1 (de) 1979-02-01
IT1112277B (it) 1986-01-13

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Legal Events

Date Code Title Description
ST Notification of lapse