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. 15, 1991
Filed:
Jun. 12, 1990
Applicant:
Inventors:
Yasuo Ando, Hino, JP;
Takuo Nishikawa, Hino, JP;
Assignee:
Konica Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428141 ; 428694 ; 428900 ;
Abstract
A magnetic recording medium is disclosed. The surface of the magnetic layer has a Ns/Ns(t) ratio of 0.10 to 0.35, wherein the Ns is a number of spikes protruding from an average line of a surface roughness cross section curve by not less than 0.01 .mu.m and the Ns(t) is a total number of spikes protruding from the average line. The medium is improved in electromagnetic characteristics, contamination of magnetic head and rubbing noise.