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. 18, 1996
Filed:
May. 09, 1995
Applicant:
Inventors:
Masayuki Togawa, Gifu-ken, JP;
Kiyoshi Toyama, Gifu-ken, JP;
Assignee:
Teijin Seiki Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F / ;
U.S. Cl.
CPC ...
430320 ; 216 22 ; 216 39 ; 427129 ; 427130 ;
Abstract
A magnetic medium comprises a substrate formed with a stepped pit and a magnetic substance buried in the stepped pit. A method of manufacturing a magnetic medium comprises the steps of forming a first groove in a substrate by photoetching and forming a second groove in the first groove or in a portion adjacent to the first groove by the photoetching. The second groove is different in depth from the first groove. The method further comprises the step of burying magnetic substances into the first and second grooves.