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. 01, 1992
Filed:
Jan. 22, 1991
Applicant:
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360135 ; 360131 ;
Abstract
A magnetic recording disk comprising at least a magnetic layer on a circular rigid substrate with a physically abraded surface having a uniform series of physical circumferential texturing, wherein the relationship between the value Rv from the diametrical arithmetic-average center line to the deepest valley and the value Rp from such center line to the highest peak is selectively determined as Rp/Rv.gtoreq.0.6 so that the CSS durability is enhanced.