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:
Nov. 25, 1997
Filed:
Jun. 05, 1995
Applicant:
Inventors:
Yoshihiro Moriguchi, Hiratsuka, JP;
Youichi Inomata, Odawara, JP;
Hiroshi Yashiki, Odawara, JP;
Yoshiki Kato, Tokyo, JP;
Kenichi Gomi, Hitachi, JP;
Hideaki Tanaka, Katsuta, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B44C / ; G11B / ;
U.S. Cl.
CPC ...
216 22 ; 216 67 ; 216 81 ; 360131 ; 360135 ;
Abstract
A magnetic recording medium excellent in corrosion resistance and rubbing reliability is realized by forming a number of concavities and convexities on the surface of a protective layer formed on a substrate and applying dry etching with a noble gas after the formation of the concavities and convexities to form a modified layer having hydrophobic nature on the surface of the protective layer.