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:
Sep. 02, 1986
Filed:
Jul. 16, 1984
Applicant:
Inventors:
Keishi Nakashima, Yunotani, JP;
Takashi Hatanai, Koide, JP;
Koichi Mukasa, Koide, JP;
Yutaka Shimada, Sendai, JP;
Assignee:
Alps Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
428611 ; 428624 ; 428625 ; 428626 ; 428630 ; 428667 ; 428668 ; 428678 ; 428928 ; 360134 ; 360135 ; 360136 ; 148403 ;
Abstract
A perpendicular magnetic recording medium composed of a base material, a 1st magnetic thin layer formed on the base material, and a perpendicularly magnetizable 2nd magnetic thin layer formed on the 1st magnetic thin layer, wherein the 1st magnetic thin layer is composed of a Co-base ternary amorphous alloy containing small amounts of Hf and Ta.