JPS5514554A - Magnetic head and its manufacture - Google Patents

Magnetic head and its manufacture

Info

Publication number
JPS5514554A
JPS5514554A JP8719078A JP8719078A JPS5514554A JP S5514554 A JPS5514554 A JP S5514554A JP 8719078 A JP8719078 A JP 8719078A JP 8719078 A JP8719078 A JP 8719078A JP S5514554 A JPS5514554 A JP S5514554A
Authority
JP
Japan
Prior art keywords
main magnetic
magnetic
magnetic circuits
operation gap
glass
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
JP8719078A
Other languages
Japanese (ja)
Inventor
Hideo Fujiwara
Sanehiro Kudo
Shigeki Yamamura
Noriyoshi Arakawa
Takayuki Kumasaka
Teizo Tamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8719078A priority Critical patent/JPS5514554A/en
Publication of JPS5514554A publication Critical patent/JPS5514554A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To minimize the deviation in initial characteristics and to reduce the performance change due to elapsed time of usage, by constituting the concaved surface for non-magnetic filling material on the opposed surface of the magnetic recording media than the operation gap surface of the magnetic core.
CONSTITUTION: The main magnetic circuits 12,12' including the operation gap 11 are constituted with ferrite. The concaves 13,13' are placed near the operation gap of the main magnetic circuits so that the thickness Tg near the operation gap 11 of the main magnetic circuits 12,12' can be smaller than the thickness Tc of the average main magnetic circuits. Glass is filled in the concaves 13,13' to form the glass parts 15,15', and the opposed surface 14 of magnetic recordng media formed with the glass and the main magnetic circuits forms a plurality of the magnetic head cores 10 formed with approximate spheroidal plane. After sticking the head core 10 on the base 26, the abrasive tape 29 is wound on the cylinder 28 having groove 27 and polish is made with the rotary polish unit. Thus, the deviation in the initial characteristics of the head can be minimized.
COPYRIGHT: (C)1980,JPO&Japio
JP8719078A 1978-07-19 1978-07-19 Magnetic head and its manufacture Pending JPS5514554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8719078A JPS5514554A (en) 1978-07-19 1978-07-19 Magnetic head and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8719078A JPS5514554A (en) 1978-07-19 1978-07-19 Magnetic head and its manufacture

Publications (1)

Publication Number Publication Date
JPS5514554A true JPS5514554A (en) 1980-02-01

Family

ID=13908061

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8719078A Pending JPS5514554A (en) 1978-07-19 1978-07-19 Magnetic head and its manufacture

Country Status (1)

Country Link
JP (1) JPS5514554A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57502028A (en) * 1980-12-22 1982-11-11
JPS5844861U (en) * 1981-09-18 1983-03-25 三洋電機株式会社 Amorphous semiconductor photodetector
US5070272A (en) * 1989-07-05 1991-12-03 Hitachi, Ltd. Photoconductive device and method of operating same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS537219A (en) * 1976-07-07 1978-01-23 Mitsubishi Electric Corp Multi-element type magnetic head and production thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS537219A (en) * 1976-07-07 1978-01-23 Mitsubishi Electric Corp Multi-element type magnetic head and production thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57502028A (en) * 1980-12-22 1982-11-11
JPS5844861U (en) * 1981-09-18 1983-03-25 三洋電機株式会社 Amorphous semiconductor photodetector
JPS6246278Y2 (en) * 1981-09-18 1987-12-12
US5070272A (en) * 1989-07-05 1991-12-03 Hitachi, Ltd. Photoconductive device and method of operating same

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