FR2414772A1 - Transducteur electromagnetique pour dispositif d'enregistrement et de reproduction sur bande - Google Patents

Transducteur electromagnetique pour dispositif d'enregistrement et de reproduction sur bande

Info

Publication number
FR2414772A1
FR2414772A1 FR7900622A FR7900622A FR2414772A1 FR 2414772 A1 FR2414772 A1 FR 2414772A1 FR 7900622 A FR7900622 A FR 7900622A FR 7900622 A FR7900622 A FR 7900622A FR 2414772 A1 FR2414772 A1 FR 2414772A1
Authority
FR
France
Prior art keywords
crystallographic
air gap
tape recording
electromagnetic transducer
magnetic air
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
FR7900622A
Other languages
English (en)
Other versions
FR2414772B1 (fr
Inventor
Shiro Hirai
Atsushi Nei
Kunihide Sakai
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Publication of FR2414772A1 publication Critical patent/FR2414772A1/fr
Application granted granted Critical
Publication of FR2414772B1 publication Critical patent/FR2414772B1/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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/193—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being ferrite or other magnetic particles
    • 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
    • G11B5/133—Structure or manufacture of heads, e.g. inductive with cores composed of particles, e.g. with dust cores, with ferrite cores with cores composed of isolated magnetic particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49034—Treating to affect magnetic properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49048—Machining magnetic material [e.g., grinding, etching, polishing]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49055—Fabricating head structure or component thereof with bond/laminating preformed parts, at least two magnetic

Landscapes

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

Abstract

Tête de transducteur électromagnétique pour dispositif d'enregistrement et de reproduction sur bande, comprenant un couple de noyaux en ferrite monocristallin en forme d'U, dont les premières branches sont reliées entre elles et les secondes branches espacées l'une de l'autre pour former un entrefer magnétique dans lequel est prévue une galette de matière vitreuse Chacun des noyaux en ferrite a des plans cristallographiques 211, 110 et 111. L'entrefer magnétique est aligné avec le plan cristallographique 111 et les secondes branches des noyaux sont conformées de manière à fournir une surface de contact avec la bande, parallèle au plan cristallographique 211. Le plan cristallographique 110 est perpendiculaire aux plans 211 et 111 et forme un passage pour le flux magnétique. L'axe cristallographique 110 de chaque noyau fait un certain angle avec l'entrefer magnétique, de façon à rencontrer l'axe 110 de l'autre noyau en un point aligné avec la face de contact avec la bande.
FR7900622A 1978-01-13 1979-01-11 Transducteur electromagnetique pour dispositif d'enregistrement et de reproduction sur bande Granted FR2414772A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP190578A JPS5496012A (en) 1978-01-13 1978-01-13 Magnetic head

Publications (2)

Publication Number Publication Date
FR2414772A1 true FR2414772A1 (fr) 1979-08-10
FR2414772B1 FR2414772B1 (fr) 1985-03-01

Family

ID=11514584

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7900622A Granted FR2414772A1 (fr) 1978-01-13 1979-01-11 Transducteur electromagnetique pour dispositif d'enregistrement et de reproduction sur bande

Country Status (5)

Country Link
US (1) US4246619A (fr)
JP (1) JPS5496012A (fr)
DE (1) DE2900916C2 (fr)
FR (1) FR2414772A1 (fr)
GB (1) GB2012468B (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56163518A (en) * 1980-05-16 1981-12-16 Hitachi Ltd Magnetic head
JPS5755522A (en) * 1980-09-22 1982-04-02 Hitachi Ltd Magnetic head
JPS5891517A (ja) * 1981-11-27 1983-05-31 Hitachi Ltd 磁気記録再生装置
NL8200481A (nl) * 1982-02-09 1983-09-01 Philips Nv Magneetkop.
JPS5971112A (ja) * 1982-10-15 1984-04-21 Comput Basic Mach Technol Res Assoc 薄膜磁気ヘツド
JPS60138708A (ja) * 1983-12-27 1985-07-23 Ngk Insulators Ltd 磁気ヘッド用コアの製造法
JPS60224109A (ja) * 1984-04-20 1985-11-08 Hitachi Ltd 複合型磁気ヘツドを用いた磁気記録再生装置
JP2619017B2 (ja) * 1988-10-11 1997-06-11 日立マクセル株式会社 複合磁気ヘッド
JPH0410206A (ja) * 1990-04-26 1992-01-14 Victor Co Of Japan Ltd 接合型磁気ヘッド
US5426550A (en) * 1990-06-08 1995-06-20 Matsushita Electric Industrial Co., Ltd. Multitrack magnetic head assembly for scanning a magnetic tape with a plurality of magnetic head tips
KR100242036B1 (ko) * 1991-01-08 2000-02-01 다카노 야스아키 자기 헤드
JPH05197903A (ja) * 1991-10-28 1993-08-06 Canon Inc 光磁気記録装置
JP3538930B2 (ja) * 1994-09-21 2004-06-14 ソニー株式会社 磁気ヘッド
JP3462019B2 (ja) * 1996-10-23 2003-11-05 アルプス電気株式会社 磁気ヘッド
JPH10162308A (ja) * 1996-11-29 1998-06-19 Alps Electric Co Ltd 磁気ヘッド
JP3517067B2 (ja) * 1996-11-29 2004-04-05 アルプス電気株式会社 磁気ヘッド

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1180200A (fr) * 1956-07-28 1959-06-02 Philips Nv Dispositif permettant de réduire le flux de fuites des circuits magnétiques

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498088B1 (fr) * 1969-06-12 1974-02-23
US3810245A (en) * 1971-06-28 1974-05-07 Sony Corp Single crystal ferrite magnetic head
NL175473C (nl) * 1972-06-20 1984-11-01 Matsushita Electric Ind Co Ltd Ferrietkern voor een magneetkop en werkwijze voor het vervaardigen van een ferrietkern.
JPS5334482A (en) * 1976-09-10 1978-03-31 Mitsubishi Electric Corp Semiconductor integrating circuit device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1180200A (fr) * 1956-07-28 1959-06-02 Philips Nv Dispositif permettant de réduire le flux de fuites des circuits magnétiques

Also Published As

Publication number Publication date
GB2012468B (en) 1982-05-06
DE2900916A1 (de) 1979-10-04
JPS633365B2 (fr) 1988-01-23
DE2900916C2 (de) 1986-02-27
GB2012468A (en) 1979-07-25
US4246619A (en) 1981-01-20
JPS5496012A (en) 1979-07-30
FR2414772B1 (fr) 1985-03-01

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