JPS5482220A - Production of magnetic head - Google Patents

Production of magnetic head

Info

Publication number
JPS5482220A
JPS5482220A JP15021677A JP15021677A JPS5482220A JP S5482220 A JPS5482220 A JP S5482220A JP 15021677 A JP15021677 A JP 15021677A JP 15021677 A JP15021677 A JP 15021677A JP S5482220 A JPS5482220 A JP S5482220A
Authority
JP
Japan
Prior art keywords
core
head
width
time use
heated
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.)
Pending
Application number
JP15021677A
Other languages
Japanese (ja)
Inventor
Takeshi Takahashi
Akio Kuroe
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15021677A priority Critical patent/JPS5482220A/en
Publication of JPS5482220A publication Critical patent/JPS5482220A/en
Pending 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
    • G11B5/147—Structure or manufacture of heads, e.g. inductive with cores being composed of metal sheets, i.e. laminated cores with cores composed of isolated magnetic layers, e.g. sheets

Landscapes

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

Abstract

PURPOSE:To save process of molding, etc. and obtain stable outputs in long-time use by partially heating the core composed of amorphous ferromagnetic material thereby forming the region where the magnetic permeability of part of the core is decreased. CONSTITUTION:Thin cores 21 obtained from amorphous ferromagnetic thin plates are laminated to provide a head core 20. Thereafter, the beam from a laser oscillator 22 is radiated to the portion of part 24 of the tape slide face 23 of the head core 20 to heat that portion. It turns out that this heated portion loses magnetism as compared to the other unheated portions. Hence, when the width U0 of the head core is heated at a width of U1 from respecive both sides of the core, the effective track width U of the head becomes U0-2U1. As a result, the core width U0 in the tape sliding face of the head is taken widely and therefore abrasion resistance is considerably improved and stable outputs may be obtained despite long-time use.
JP15021677A 1977-12-13 1977-12-13 Production of magnetic head Pending JPS5482220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15021677A JPS5482220A (en) 1977-12-13 1977-12-13 Production of magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15021677A JPS5482220A (en) 1977-12-13 1977-12-13 Production of magnetic head

Publications (1)

Publication Number Publication Date
JPS5482220A true JPS5482220A (en) 1979-06-30

Family

ID=15492064

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15021677A Pending JPS5482220A (en) 1977-12-13 1977-12-13 Production of magnetic head

Country Status (1)

Country Link
JP (1) JPS5482220A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5482221A (en) * 1977-12-14 1979-06-30 Matsushita Electric Ind Co Ltd Production of magnetic head
JPS5647916A (en) * 1979-09-20 1981-04-30 Hitachi Metals Ltd Manufacture of magnetic head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5020653U (en) * 1973-06-20 1975-03-08
JPS5111427A (en) * 1974-07-19 1976-01-29 Hitachi Ltd Jikihetsudono gyatsupukeiseiho
JPS5194211A (en) * 1975-02-15 1976-08-18

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5020653U (en) * 1973-06-20 1975-03-08
JPS5111427A (en) * 1974-07-19 1976-01-29 Hitachi Ltd Jikihetsudono gyatsupukeiseiho
JPS5194211A (en) * 1975-02-15 1976-08-18

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5482221A (en) * 1977-12-14 1979-06-30 Matsushita Electric Ind Co Ltd Production of magnetic head
JPS599974B2 (en) * 1977-12-14 1984-03-06 松下電器産業株式会社 Manufacturing method of magnetic head
JPS5647916A (en) * 1979-09-20 1981-04-30 Hitachi Metals Ltd Manufacture of magnetic head

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