GB1494565A - Methods of making ferrite magnetic transducer heads - Google Patents

Methods of making ferrite magnetic transducer heads

Info

Publication number
GB1494565A
GB1494565A GB878675A GB878675A GB1494565A GB 1494565 A GB1494565 A GB 1494565A GB 878675 A GB878675 A GB 878675A GB 878675 A GB878675 A GB 878675A GB 1494565 A GB1494565 A GB 1494565A
Authority
GB
United Kingdom
Prior art keywords
glass
magnetic transducer
gap
ferrite magnetic
methods
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.)
Expired
Application number
GB878675A
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 GB1494565A publication Critical patent/GB1494565A/en
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
    • G11B5/23—Gap features
    • G11B5/235—Selection of material for gap filler
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/003—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts
    • C04B37/005—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts consisting of glass or ceramic material
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/10—Glass interlayers, e.g. frit or flux
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/34—Oxidic
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/64—Forming laminates or joined articles comprising grooves or cuts
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/76—Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Magnetic Heads (AREA)
  • Ceramic Products (AREA)

Abstract

1494565 Magnetic transducer head SONY CORP 3 March 1975 [9 March 1974] 8786/75 Heading C1M [Also in Division B3] A ferrite magnetic transducer head is made by: (a) placing two ferrite core blocks with a gap therebetween; (b) placing a vitreous sealing material in close proximity to the gap; and (c) melting the material under a non-oxidizing atmosphere (e.g. N 2 ) so that the material flows into the gap; the vitreous sealing material having been prepared by melting under a non-oxidizing atmosphere a glass containing at least one of PbO, B 2 O 3 , Bi 2 O 3 and N 2 O in a total amount of more than 30 wt. per cent, the glass having a softening point less than 750‹ C., the glass being mixed with 3-15 wt. per cent (based on the amount of glass) of at least one additive in powder form selected from Cu, Cu 2 O and ZnO. The glass may optionally include Al 2 O 3 , V 2 O 5 and/or GeO 2 . Oxygen is said to be absorbed, in making the head, by oxidation of the Zn, Cu, or Cu 2 O.
GB878675A 1974-03-09 1975-03-03 Methods of making ferrite magnetic transducer heads Expired GB1494565A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2755274A JPS5439845B2 (en) 1974-03-09 1974-03-09

Publications (1)

Publication Number Publication Date
GB1494565A true GB1494565A (en) 1977-12-07

Family

ID=12224214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB878675A Expired GB1494565A (en) 1974-03-09 1975-03-03 Methods of making ferrite magnetic transducer heads

Country Status (4)

Country Link
JP (1) JPS5439845B2 (en)
CA (1) CA1049238A (en)
DE (1) DE2510117A1 (en)
GB (1) GB1494565A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5277714A (en) * 1975-12-24 1977-06-30 Ngk Insulators Ltd Method of producing magnetic head core
DE2655480C2 (en) * 1976-12-08 1982-04-22 Florian Prof. Dr.-Ing.habil. 4630 Bochum Haberey Method for connecting ferrite parts
JPS5668914A (en) * 1979-11-05 1981-06-09 Victor Co Of Japan Ltd Magnetic head
JPH0633528Y2 (en) * 1985-05-20 1994-08-31 三洋電機株式会社 Magnetic head
JPS61295278A (en) * 1985-06-24 1986-12-26 日立金属株式会社 Method of joining ceramic part to glass
JPH0662316B2 (en) * 1988-06-07 1994-08-17 シャープ株式会社 Low fusion glass composition for magnetic head

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48100416A (en) * 1972-03-31 1973-12-18

Also Published As

Publication number Publication date
CA1049238A (en) 1979-02-27
JPS5439845B2 (en) 1979-11-30
DE2510117A1 (en) 1975-09-18
JPS50121308A (en) 1975-09-23

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee