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:
Oct. 18, 1994
Filed:
Dec. 23, 1992
Applicant:
Inventors:
Brij B Lal, San Jose, CA (US);
Tadashi Shinohara, Fremont, CA (US);
Assignee:
HMT Technology Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
20419215 ; 2041922 ; 20419223 ;
Abstract
A magnetic thin-film medium is disclosed. The medium includes a disc-like non-metallic substrate, and a sputtered underlayer having an axial composition gradient in which a lowermost stratum of the layer is a coating metal, such as Ti, V, or W, and an uppermost stratum of the underlayer is Cr. A magnetic thin-film layer is formed on the substrate, and a overcoat is formed on the magnetic layer. Also disclosed is a method of forming the medium.