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. 12, 2002
Filed:
Feb. 03, 2000
Osamu Fujisaku, Saitama, JP;
Hironobu Nishimura, Saitama, JP;
Yutaka Matsumoto, Saitama, JP;
Hideo Kobayashi, Tokyo, JP;
Origin Electric Company, Limited, Tokyo, JP;
Abstract
A method and apparatus for manufacturing an optical disc, a transparent disc substrate having two relatively wide-area surfaces thereof on at least one of which an information is recorded and a first reflective film is formed onto a dummy disc having similar relatively wide-area surfaces thereof on at least one which another information is recorded and a second reflective film having a light semi-transmissive characteristic is formed are bonded via an adhesive layer and, thereafter, an external force is applied between the dummy disc and the disc substrate through an integrated center hole penetrated through the dummy disc and the disc substrate at center positions thereof to peel off the dummy disc at a first interface between the dummy disc and the second reflective film thereof In a preferred embodiment, a partial peeling off of the dummy disc from the second reflective film is carried out through a mechanical force and a complete peeling off of the dummy disc from the second reflective film is carried out through a supply of a compressed air to the first interface between the partially peeled dummy disc and the second reflective film.