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:
Mar. 31, 1981
Filed:
Apr. 24, 1979
Applicant:
Inventors:
Assignee:
Fuji Photo Film Co., Ltd., Minami-ashigara, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430296 ; 156643 ; 156646 ; 1566591 ; 2041 / ; 2041 / ; 427 531 ; 430320 ; 430323 ; 430326 ; 430394 ; 430945 ;
Abstract
A disk-recording plate is produced by successively forming an etching layer and a laser-sensitive layer on a substrate. The assembly is exposed to the irradiation of laser beams to selectively remove the laser-sensitive layer and is then subjected to a sputter-etching treatment in an atmosphere of a reactive gas to remove the etching layer at portions corresponding to the removed portions of the laser-sensitive layer. The method permits monitoring of recording, and thus ensures accurate recording with good resolution.