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. 29, 1993
Filed:
Dec. 09, 1992
Sumitomo Metal Mining Company, Limited, Tokyo, JP;
Abstract
A process for fabricating a magnetic disk which comprises texturing a magnetic disk substrate made of a non-magnetic material having provided on the surface thereof a hard layer of a metal or an oxide to thereby provide fine irregularities on the surface of said substrate, followed by establishing thereon a magnetic recording layer comprising a film of a ferromagnetic metal, wherein said texturing is carried out using a processing solution comprising an aqueous solution of a surface active agent having dispersed therein diamond abrasive grains substantially only not larger than 4 .mu.m in grain diameter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile