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:
Nov. 17, 1998
Filed:
Apr. 25, 1997
Applicant:
Inventors:
Yoshinobu Okumura, Takarazuka, JP;
Tadashi Akita, Ibaraki, JP;
Assignee:
StorMedia Incorporated, Santa Clara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428667 ; 428 657 ; 4286 / ; 428900 ; 428928 ;
Abstract
A magnetic recording medium has a magnetic layer of a Co alloy with a Pt content of about 3 to about 6 atomic % and is given a higher coercive force. The medium includes a ground layer formed on a nonmagnetic base plate and having a composition comprising, as expressed in atomic %, 1 to 6% of Ta, 1 to 6% of Cu and the balance substantially Cr, whereby an increased crystal lattice constant is afforded to the Cr.