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. 01, 1996
Filed:
Jun. 17, 1994
Applicant:
Inventors:
Yuzo Yamamoto, Tochigi-ken, JP;
Atsushi Ishikawa, Tochigi-ken, JP;
Michihide Yamauchi, Tochigi-ken, JP;
Assignee:
Kao Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428141 ; 428408 ; 428 653 ; 4286 / ; 4286 / ; 4286 / ; 428900 ; 427129 ; 427130 ; 427131 ; 360131 ; 360135 ; 2041921 ; 205674 ;
Abstract
An object of the present invention is to offer a magnetic recording medium comprising a substrate and a magnetic film formed on the substrate, wherein the substrate is formed using a conductive material and a surface of said substrate is processed by electroetching. As this magnetic recording medium has excellent surface characteristics, excellent durability and small spacing loss, its recording and play back characteristics are excellent.