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, 1991
Filed:
Jul. 21, 1989
Applicant:
Inventors:
Kazuhiro Kimura, Nishinomiya, JP;
Hiroyuki Katayama, Nara, JP;
Junichiro Nakayama, Nara, JP;
Kenji Ohta, Nara, JP;
Hiroyuki Ikenaga, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; B05D / ; B05D / ; C23C / ;
U.S. Cl.
CPC ...
427164 ; 427275 ; 427276 ; 427278 ; 427296 ; 118 44 ; 118718 ; 118725 ; 20429824 ; 20429826 ;
Abstract
A method and apparatus for manufacturing an optical memory device. The method comprises the steps of forming a secondary medium layer on a substrate and forming on the substrate guide track grooves for guiding a light beam, both steps being carried out in a single vacuum chamber. The step of forming the guide track grooves comprises heating the substrate to soften the same and pressurizing the substrate by a pressure roller having transcribed patterns corresponding to the guide track grooves on its cylindrical surface.