The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 1987
Filed:
Dec. 27, 1982
Applicant:
Inventor:
Minoru Hosokawa, Suwa, JP;
Assignee:
Seiko Epson Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428 65 ; 428213 ; 428409 ; 428457 ; 4284735 ; 428694 ; 428702 ; 428900 ;
Abstract
The magnetic recording medium includes a soft magnetic thin film layer of high magnetic permeability formed on a substrate, a non-magnetic thin film layer formed on the soft magnetic layer and a magnetic thin film for recording information thereon formed on the non-magnetic thin film layer. The film thickness of the non-magnetic thin film layer is equal to or less than that of the magnetic thin film layer for recording. And the non-magnetic thin film layer is an amorphous or macromolecular substance upon which the crystalline structure of the recording thin film layer forms with a perpendicular orientation favorable for magnetization.