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:
Sep. 30, 1986
Filed:
Feb. 07, 1985
Masaakira Umehara, Yokohama, JP;
Ricoh Co., Ltd., Tokyo, JP;
Abstract
This invention relates to an optical information recording medium comprising a substrate, recording layer, under layer and/or under layer having an information track of concavo-convex pattern, characterized in that said under layer on the substrate is formed by curing a light-curable composition by active ray irradiation, and that said light-curable composition contains at least one of photo-polymerizable components selected from the group consisting of (A) difunctional acrylate and/or methacrylate having a functional group comprising a combination of an alkylene glycol with a cycloaliphatic and/or polycycloaliphatic hydrocarbonyl group, (B) difunctional acrylate and/or methacrylate having the general formula, ##STR1## wherein R.sub.1 represents hydrogen or methyl group and n represents an integer of 1 to 10, and (C) difunctional acrylate and/or methacrylate having the general formula, ##STR2## wherein R.sub.1 represents hydrogen or methyl group; R.sub.2 represents an alkylene group of C.sub.2 to C.sub.4 ; and n represents an integer of 1 to 20.