IT1074132B - Perfezionamento nei procedimenti per la fabbricazione di trasduttori magnetici quali teste di registrazione e lettura e prodotto ottenuto - Google Patents

Perfezionamento nei procedimenti per la fabbricazione di trasduttori magnetici quali teste di registrazione e lettura e prodotto ottenuto

Info

Publication number
IT1074132B
IT1074132B IT51091/76A IT5109176A IT1074132B IT 1074132 B IT1074132 B IT 1074132B IT 51091/76 A IT51091/76 A IT 51091/76A IT 5109176 A IT5109176 A IT 5109176A IT 1074132 B IT1074132 B IT 1074132B
Authority
IT
Italy
Prior art keywords
procedures
recording
improvement
manufacture
product obtained
Prior art date
Application number
IT51091/76A
Other languages
English (en)
Original Assignee
Ampex
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 Ampex filed Critical Ampex
Application granted granted Critical
Publication of IT1074132B publication Critical patent/IT1074132B/it

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
    • G11B5/1871—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
    • 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
    • Y10T29/49048—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
    • Y10T29/49057—Using glass bonding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
IT51091/76A 1975-09-22 1976-08-31 Perfezionamento nei procedimenti per la fabbricazione di trasduttori magnetici quali teste di registrazione e lettura e prodotto ottenuto IT1074132B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/615,532 US4115827A (en) 1975-09-22 1975-09-22 Magnetic transducer for narrow track recording and playback

Publications (1)

Publication Number Publication Date
IT1074132B true IT1074132B (it) 1985-04-17

Family

ID=24465803

Family Applications (1)

Application Number Title Priority Date Filing Date
IT51091/76A IT1074132B (it) 1975-09-22 1976-08-31 Perfezionamento nei procedimenti per la fabbricazione di trasduttori magnetici quali teste di registrazione e lettura e prodotto ottenuto

Country Status (11)

Country Link
US (1) US4115827A (it)
JP (1) JPS5253412A (it)
AT (1) AT357788B (it)
BE (1) BE845281A (it)
CA (1) CA1079398A (it)
DE (1) DE2642643C2 (it)
FR (1) FR2325140A1 (it)
GB (1) GB1546207A (it)
IT (1) IT1074132B (it)
NL (1) NL170988C (it)
SU (2) SU1075998A3 (it)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55157122A (en) * 1979-05-24 1980-12-06 Olympus Optical Co Ltd Magnetic head and production thereof magnetic head
US4325093A (en) * 1979-06-04 1982-04-13 Texas Instruments Incorporated Magnetic head transducer having enhanced signal output and manufacturing method therefor
US4404608A (en) * 1980-02-04 1983-09-13 Sanyo Electric Co., Ltd. Magnetic head with an improved inner core
US4475137A (en) * 1981-05-11 1984-10-02 Sanyo Electric Co., Ltd. Magnetic transducer
JPS5862810A (ja) * 1981-10-08 1983-04-14 Toshiba Corp 垂直磁化型磁気ヘッド
JPS592224A (ja) * 1982-06-25 1984-01-07 Mitsubishi Electric Corp 複合形磁気ヘツドの製造方法
US4697217A (en) * 1982-10-13 1987-09-29 Sanyo Electric Co., Ltd. Magnetic head having a main core of sheet amorphous magnetic material
JPS5984321A (ja) * 1982-11-08 1984-05-16 Nakamichi Corp 磁気ヘツド
US4602307A (en) * 1983-03-11 1986-07-22 Mitsubishi Denki Kabushiki Kaisha Compound type magnetic head
DE3319437C2 (de) * 1983-05-28 1985-04-04 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Magnetkopf und Verfahren zu seiner Herstellung
US4755898A (en) * 1983-06-13 1988-07-05 Matsushita Electric Industrial Co., Ltd. Amorphous magnetic head
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
JPS61110317A (ja) * 1984-11-01 1986-05-28 Sanyo Electric Co Ltd 磁気ヘツド
WO1994018671A1 (en) * 1993-02-12 1994-08-18 Datacard Corporation Magnetic stripe read/write head
US5617273A (en) * 1995-06-07 1997-04-01 International Business Machines Corporation Thin film slider with protruding R/W element formed by chemical-mechanical polishing
US6198609B1 (en) 1998-11-09 2001-03-06 Read-Rite Corporation CPP Magnetoresistive device with reduced edge effect and method for making same
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

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL112519C (it) * 1959-09-05
US3354540A (en) * 1961-04-07 1967-11-28 Philips Corp Method of manufacturing reliable magnetic heads having accurately predetermined dimensions
US3303292A (en) * 1963-02-25 1967-02-07 Ampex Magnetic head assembly
NL146311B (nl) * 1965-04-22 1975-06-16 Philips Nv Werkwijze voor het vervaardigen van een dubbelspleets-magneetkop en dubbelspleets-magneetkop volgens deze werkwijze vervaardigd.
FR1500622A (fr) * 1965-11-12 1967-11-03 Grundig E M V Elktro Mechanisc Tête magnétique pour pistes de faible largeur
US3597836A (en) * 1968-05-21 1971-08-10 Matsushita Electric Ind Co Ltd Method of manufacturing a multichannel magnetic head
US3613228A (en) * 1969-07-02 1971-10-19 Ibm Manufacture of multielement magnetic head assemblies
US3845550A (en) * 1972-06-23 1974-11-05 Ampex Method of manufacturing a magnetic head
US3846840A (en) * 1973-08-10 1974-11-05 Ibm Read/write and longitudinal edge erase head assembly having multiple similarly shaped layers

Also Published As

Publication number Publication date
NL7609924A (nl) 1977-03-24
GB1546207A (en) 1979-05-23
CA1079398A (en) 1980-06-10
FR2325140A1 (fr) 1977-04-15
DE2642643A1 (de) 1977-04-14
ATA690076A (de) 1979-12-15
FR2325140B1 (it) 1980-09-05
NL170988C (nl) 1983-01-17
JPS5253412A (en) 1977-04-30
DE2642643C2 (de) 1982-12-16
SU1095884A3 (ru) 1984-05-30
US4115827A (en) 1978-09-19
AT357788B (de) 1980-07-25
NL170988B (nl) 1982-08-16
BE845281A (fr) 1976-12-16
SU1075998A3 (ru) 1984-02-23

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