FR2262368B1 - - Google Patents

Info

Publication number
FR2262368B1
FR2262368B1 FR7505545A FR7505545A FR2262368B1 FR 2262368 B1 FR2262368 B1 FR 2262368B1 FR 7505545 A FR7505545 A FR 7505545A FR 7505545 A FR7505545 A FR 7505545A FR 2262368 B1 FR2262368 B1 FR 2262368B1
Authority
FR
France
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
Application number
FR7505545A
Other versions
FR2262368A1 (fr
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Publication of FR2262368A1 publication Critical patent/FR2262368A1/fr
Application granted granted Critical
Publication of FR2262368B1 publication Critical patent/FR2262368B1/fr
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
    • G11B5/187—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
    • 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
    • G11B5/23—Gap features
    • G11B5/235—Selection of material for gap filler
    • 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
    • Y10T29/49057—Using glass bonding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Glass Compositions (AREA)
  • Magnetic Heads (AREA)
FR7505545A 1974-02-21 1975-02-21 Expired FR2262368B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2071674A JPS5427132B2 (fr) 1974-02-21 1974-02-21

Publications (2)

Publication Number Publication Date
FR2262368A1 FR2262368A1 (fr) 1975-09-19
FR2262368B1 true FR2262368B1 (fr) 1980-10-17

Family

ID=12034873

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7505545A Expired FR2262368B1 (fr) 1974-02-21 1975-02-21

Country Status (7)

Country Link
US (1) US3954434A (fr)
JP (1) JPS5427132B2 (fr)
CA (1) CA1033456A (fr)
DE (1) DE2507625C2 (fr)
FR (1) FR2262368B1 (fr)
GB (1) GB1494134A (fr)
NL (1) NL7502135A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51145306A (en) * 1975-06-10 1976-12-14 Olympus Optical Co Ltd Manufacturing method of magnetic head and its device
JPS5370808A (en) * 1976-12-07 1978-06-23 Victor Co Of Japan Ltd Magnetic head
DE3011696C2 (de) * 1980-03-26 1984-11-15 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Verfahren zur Herstellung eines Magnetkopfes
JPS5969481A (ja) * 1982-10-06 1984-04-19 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション セラミツクの接着方法
US4611259A (en) * 1983-02-08 1986-09-09 Ampex Corporation Magnetic transducer structure having reduced track width and a method of manufacturing thereof
DE3433750A1 (de) * 1984-09-14 1986-05-22 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Magnetkopf und verfahren zu seiner herstellung
JPS6370912A (ja) * 1986-09-12 1988-03-31 Hitachi Ltd 磁気ヘツドギヤツプ接合用ガラス
US6191934B1 (en) * 1998-10-02 2001-02-20 Sarnoff Corporation & Co., Ltd. High dielectric constant embedded capacitors
US6597271B2 (en) * 2001-10-12 2003-07-22 Galliano Riccardo Busletta Electromagnetic apparatus having adjusting effective core gap
RU2721609C1 (ru) * 2019-10-22 2020-05-21 Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт химии силикатов им. И.В. Гребенщикова Российской академии наук (ИХС РАН) Способ получения мультиферроиков методом пропитки на основе ферромагнитной стекломатрицы

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1050565B (de) * 1959-02-12 Loewe Opta Aktiengesellschaft Berlin Steglitz Verfahren zum Herstellen gleichmäßiger dunner diamagnetischer Schichten als Spaltfüller fur Magnetkopfe
US3024318A (en) * 1955-10-04 1962-03-06 Philips Corp Glass gap spacer for magnetic heads
NL123062C (fr) * 1962-05-04
US3494026A (en) * 1962-08-13 1970-02-10 Matsushita Electric Ind Co Ltd Methods for manufacturing magnetic heads
US3317298A (en) * 1963-04-11 1967-05-02 Philips Corp Process for joining surfaces of refractory material with a mno-sio2-al2o3 system
US3577634A (en) * 1969-06-18 1971-05-04 Ibm Method of manufacturing a magnetic head assembly
US3639701A (en) * 1970-07-02 1972-02-01 Ibm Magnetic recording head having a nonmagnetic ferrite gap
US3681044A (en) * 1970-07-06 1972-08-01 Ibm Method of manufacturing ferrite recording heads with a multipurpose devitrifiable glass

Also Published As

Publication number Publication date
US3954434A (en) 1976-05-04
DE2507625C2 (de) 1983-12-15
GB1494134A (en) 1977-12-07
FR2262368A1 (fr) 1975-09-19
JPS50115513A (fr) 1975-09-10
DE2507625A1 (de) 1975-09-04
CA1033456A (fr) 1978-06-20
NL7502135A (nl) 1975-08-25
JPS5427132B2 (fr) 1979-09-07

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Legal Events

Date Code Title Description
ST Notification of lapse