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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
JPS6413203AJP16927187AJP16927187AJPS6413203AJP S6413203 AJPS6413203 AJP S6413203AJP 16927187 AJP16927187 AJP 16927187AJP 16927187 AJP16927187 AJP 16927187AJP S6413203 AJPS6413203 AJP 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 CorpfiledCriticalNEC Corp
Priority to JP16927187ApriorityCriticalpatent/JPS6413203A/en
Publication of JPS6413203ApublicationCriticalpatent/JPS6413203A/en
Publication of JPH0568763B2publicationCriticalpatent/JPH0568763B2/ja
Grantedlegal-statusCriticalCurrent

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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.
JP16927187A1987-07-061987-07-06Thin film electromagnet impressing magnetic field for optical magnetic diskGrantedJPS6413203A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP16927187AJPS6413203A (en)1987-07-061987-07-06Thin film electromagnet impressing magnetic field for optical magnetic disk

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP16927187AJPS6413203A (en)1987-07-061987-07-06Thin film electromagnet impressing magnetic field for optical magnetic disk

Publications (2)

Publication NumberPublication Date
JPS6413203Atrue JPS6413203A (en)1989-01-18
JPH0568763B2 JPH0568763B2 (en)1993-09-29

Family

ID=15883413

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP16927187AGrantedJPS6413203A (en)1987-07-061987-07-06Thin film electromagnet impressing magnetic field for optical magnetic disk

Country Status (1)

CountryLink
JP (1)JPS6413203A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH02235205A (en)*1989-03-091990-09-18Canon Inc bias magnetic field generator
JPH0352829U (en)*1989-09-221991-05-22
WO1991011806A1 (en)*1990-01-311991-08-08Sony CorporationMagneto-optical recording/reproducing apparatus
US5293360A (en)*1989-03-091994-03-08Canon Kabushiki KaishaMagnetic field generating device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH02235205A (en)*1989-03-091990-09-18Canon Inc bias magnetic field generator
US5293360A (en)*1989-03-091994-03-08Canon Kabushiki KaishaMagnetic field generating device
JPH0352829U (en)*1989-09-221991-05-22
WO1991011806A1 (en)*1990-01-311991-08-08Sony CorporationMagneto-optical recording/reproducing apparatus

Also Published As

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

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