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公开(公告)号：DE3681056D1
公开(公告)日：1991-10-02
申请号：DE3681056
申请日：1986-04-10
Applicant: SONY CORP
Inventor： HAYASHI KAZUHIKO , HAYAKAWA MASATOSHI , OCHIAI YOSHITAKA , MATSUDA HIDEKI , ISHIKAWA WATARU , IWASAKI YOU , ASO KOUICHI
Abstract: Disclosed is a soft magnetic thin film which has superior soft magnetic characteristics and high saturation magnetic flux density. The magnetic thin film is formed by physical vapour deposition process and composed of Fe, Ga, and Si with optional inclusion of Co, Ru, or Cr.
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公开(公告)号：DE3574519D1
公开(公告)日：1990-01-04
申请号：DE3574519
申请日：1985-09-09
Applicant: SONY CORP
Inventor： HAYASHI KAZUHIKO , OCHIAI YOSHITAKA , HAYAKAWA MASATOSHI , MATSUDA HIDEKI , ISHIKAWA WATARU , IWASAKI YOU , ASO KOICHI
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公开(公告)号：CA1263435A
公开(公告)日：1989-11-28
申请号：CA490058
申请日：1985-09-05
Applicant: SONY CORP
Inventor： HAYASHI KAZUHIKO , OCHIAI YOSHITAKA , HAYAKAWA MASATOSHI , MATSUDA HIDEKI , ISHIKAWA WATARU , IWASAKI YOU , ASO KOICHI
Abstract: A magnetic structure having improved permeability characteristics at very high frequencies and comprising a plurality of magnetic metal layers, together with electrically insulating layers which are interposed between successive magnetic metal layers to form a laminate therewith, and at least one conductive strip electrically connecting together at least two of the magnetic metal layers, the conductive strip being of lesser width than the surface on which it is located, and serving to reduce eddy current losses.
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公开(公告)号：DE3324729A1
公开(公告)日：1984-01-12
申请号：DE3324729
申请日：1983-07-08
Applicant: SONY CORP
Inventor： HAYAKAWA MASATOSHI , ASO KOICHI , UEDAIRA SATORU , OCHIAI YOSHITAKA , MATSUDA HIDEKI , HOTAI KAZUHIDE , HAYASHI KAZUHIKO
Abstract: In a process for heat treating amorphous magnetic alloys by producing a film composed of the amorphous magnetic alloy and heat-treating the film at an elevated temperature below the Curie temperature and the crystallisation temperature of the amorphous magnetic alloy using a first magnetic field and a second magnetic field which are repeatedly applied in an alternating manner, the first magnetic field is applied for a predetermined time in one direction of a principle surface of the amorphous magnetic alloy film and the second magnetic field is applied for a predetermined time in a second direction perpendicular to the first direction in the principle surface of the amorphous magnetic alloy film.
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公开(公告)号：DE69122702D1
公开(公告)日：1996-11-21
申请号：DE69122702
申请日：1991-08-21
Applicant: SONY CORP
Inventor： OCHIAI YOSHITAKA , MATSUDA HIDEKI , NAGAKI TAKEHIRO , HASHIMOTO SHUNICHI
Abstract: A magnetic head comprising a magnetic path (1) and a vertically magnetizable film (3). The magnetic path contains a first gap (G1) facing a magnetic recording medium (5) and a second gap (G2). The vertically magnetizable film (3) is formed across the second gap (G2) on the principal plane or outer circumference of the magnetic path (1). A linearly polarized light beam is irradiated onto the vertically magnetizable film and the resulting reversal of magnetization in the vertically magnetizable film is detected through the use of a polar Kerr effect. This scheme allows data to be reproduced with sufficient sensitivity from tracks of very small widths.
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Patent Agency Ranking
公开(公告)号：CA1278770C
公开(公告)日：1991-01-08
申请号：CA486890
申请日：1985-07-16
Applicant: SONY CORP
Inventor： HAYAKAWA MASATOSHI , ASO KOICHI , OCHIAI YOSHITAKA , MATSUDA HIDEKI , HAYASHI KAZUHIKO , ISHIKAWA WATARU , IWASAKI YOU
Abstract: A magnetic alloy thin film consisting essentially of a first Fe-Al-Si or Fe-Ni alloy thin film of high permeability and a second Fe-Si alloy thin film directly formed on the first thin film and having high saturation magnetic flux density. The ratio in thickness of the first and second films is preferably in the range of from 1:0.1 to 2.
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公开(公告)号：DE69122702T2
公开(公告)日：1997-05-15
申请号：DE69122702
申请日：1991-08-21
Applicant: SONY CORP
Inventor： OCHIAI YOSHITAKA , MATSUDA HIDEKI , NAGAKI TAKEHIRO , HASHIMOTO SHUNICHI
Abstract: A magnetic head comprising a magnetic path (1) and a vertically magnetizable film (3). The magnetic path contains a first gap (G1) facing a magnetic recording medium (5) and a second gap (G2). The vertically magnetizable film (3) is formed across the second gap (G2) on the principal plane or outer circumference of the magnetic path (1). A linearly polarized light beam is irradiated onto the vertically magnetizable film and the resulting reversal of magnetization in the vertically magnetizable film is detected through the use of a polar Kerr effect. This scheme allows data to be reproduced with sufficient sensitivity from tracks of very small widths.
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公开(公告)号：JPH0375624B2
公开(公告)日：1991-12-02
申请号：JP11586482
申请日：1982-07-02
Applicant: SONY CORP
Inventor： OCHIAI YOSHITAKA , HAYAKAWA MASATOSHI , ASO KOICHI , KAMIHIRA AKIRA , MATSUDA HIDEKI , HOTAI KAZUHIDE , HAYASHI KAZUHIKO
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公开(公告)号：JPH0372702B2
公开(公告)日：1991-11-19
申请号：JP11901382
申请日：1982-07-08
Applicant: SONY CORP
Inventor： HAYAKAWA MASATOSHI , ASO KOICHI , KAMIHIRA AKIRA , OCHIAI YOSHITAKA , MATSUDA HIDEKI , HOTAI KAZUHIDE , HAYASHI KAZUHIKO
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公开(公告)号：JPH01152603A
公开(公告)日：1989-06-15
申请号：JP31083287
申请日：1987-12-10
Applicant: SONY CORP
Inventor： IWASAKI HIROSHI , MATSUDA HIDEKI , ASO KOICHI
Abstract: PURPOSE:To obtain an oxide magnetic thin film which is superb in the formation of film by using a material where one part of Fe is substituted with vanadium. CONSTITUTION:An oxide magnetic thin film has a composition which is expressed by a general expression COxVyFe3-x-yO4-delta (wherein 0.7
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