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:
Dec. 20, 2005
Filed:
Jul. 14, 2004
Junichi Satou, Tokyo, JP;
Mamoru Usami, Tokyo, JP;
Yoshimi Sakai, Tokyo, JP;
Akira Itoga, Tokyo, JP;
Junichi Satou, Tokyo, JP;
Mamoru Usami, Tokyo, JP;
Yoshimi Sakai, Tokyo, JP;
Akira Itoga, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
An optical recording medium is made by a step of bonding a light-transmissive substrate to a supporting substrate having a brightness of 8 or more and a saturation of 4 or less via a bonding layer composed of an epoxy resin; and a step of forming a transparent ink-receiving layer on a surface of the supporting substrate remote from the light-transmissive substrate. The bonding using the epoxy resin is conducted by a method of curing the resin by using a cationic initiator, a method of curing the resin by an addition reaction between the resin and a crosslinking agent containing an active hydrogen compound, a method of curing the resin by heating, or the like. In this invention, the bonding layer is composed of a material containing an epoxy resin instead of a radically polymerizable UV-curable resin typically used. Thus, although UV irradiation through the supporting substrate is not possible, the light-transmissive substrate can be securely bonded to the supporting substrate.