JPS6413203A - Thin film electromagnet impressing magnetic field for optical magnetic disk - Google Patents

Thin film electromagnet impressing magnetic field for optical magnetic disk

Info

Publication number
JPS6413203A
JPS6413203A JP16927187A JP16927187A JPS6413203A JP S6413203 A JPS6413203 A JP S6413203A JP 16927187 A JP16927187 A JP 16927187A JP 16927187 A JP16927187 A JP 16927187A JP S6413203 A JPS6413203 A JP S6413203A
Authority
JP
Japan
Prior art keywords
thin film
magnetic
high permeability
magnetic field
optical
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.)
Granted
Application number
JP16927187A
Other languages
Japanese (ja)
Other versions
JPH0568763B2 (en
Inventor
Hideo Tanaka
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP16927187A priority Critical patent/JPS6413203A/en
Publication of JPS6413203A publication Critical patent/JPS6413203A/en
Publication of JPH0568763B2 publication Critical patent/JPH0568763B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To enable the high speed switching of a large magnetic field by making windings, which oppose against each other as interposing an optical magnetic disk, into thin film coils, formed in spiral shapes on high permeability magnetic bodies through insulation layers respectively. CONSTITUTION:A thin film electromagnet for impressing magnetic field for the optical magnetic disk is constituted of a thin film high permeability magnetic body 2, which has a cylindrical thin film high permeability magnetic body 9, around which a thin film coil 7 is wound, at one end of it, and the thin film high permeability magnetic body 1, which is installed so as to oppose against the above-mentioned magnetic body 2 as interposing the said coil 7 and the optical disk 11, and has the spiral-shaped thin film coil 8, pattern-etched around a cylindrical hollow part 21, at one end of it. Further, the thin film high permeability magnetic body 3 to couple the magnetic bodies 1 and 2 magnetically is provided. Here, the magnetic bodies 1-3 are formed on non-magnetic base plates. According to this constitution, because the inductance of coil can be made to be an extremely small value, the high speed switching of the large magnetic field comes possible.
JP16927187A 1987-07-06 1987-07-06 Thin film electromagnet impressing magnetic field for optical magnetic disk Granted JPS6413203A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16927187A JPS6413203A (en) 1987-07-06 1987-07-06 Thin film electromagnet impressing magnetic field for optical magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16927187A JPS6413203A (en) 1987-07-06 1987-07-06 Thin film electromagnet impressing magnetic field for optical magnetic disk

Publications (2)

Publication Number Publication Date
JPS6413203A true JPS6413203A (en) 1989-01-18
JPH0568763B2 JPH0568763B2 (en) 1993-09-29

Family

ID=15883413

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16927187A Granted JPS6413203A (en) 1987-07-06 1987-07-06 Thin film electromagnet impressing magnetic field for optical magnetic disk

Country Status (1)

Country Link
JP (1) JPS6413203A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02235205A (en) * 1989-03-09 1990-09-18 Canon Inc Bias magnetic field generator
JPH0352829U (en) * 1989-09-22 1991-05-22
WO1991011806A1 (en) * 1990-01-31 1991-08-08 Sony Corporation Magneto-optical recording/reproducing apparatus
US5293360A (en) * 1989-03-09 1994-03-08 Canon Kabushiki Kaisha Magnetic field generating device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02235205A (en) * 1989-03-09 1990-09-18 Canon Inc Bias magnetic field generator
US5293360A (en) * 1989-03-09 1994-03-08 Canon Kabushiki Kaisha Magnetic field generating device
JPH0352829U (en) * 1989-09-22 1991-05-22
WO1991011806A1 (en) * 1990-01-31 1991-08-08 Sony Corporation Magneto-optical recording/reproducing apparatus

Also Published As

Publication number Publication date
JPH0568763B2 (en) 1993-09-29

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees