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:
Aug. 10, 1993
Filed:
Aug. 17, 1992
Eiji Koyama, Tsuchiura, JP;
Akira Gotoh, Toride, JP;
Shuhei Nakamichi, Ibaraki, JP;
Ryoichi Sudo, Yokosuka, JP;
Hiroaki Miwa, Fujisawa, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This invention is related to an optical data recording medium of a high reliability and a large capacity, preventing moisture absorption and swelling of a resin layer formed on one side of a transparent substrate, and related to a method for manufacturing thereof whatever the optical data recording medium comprises at least a transparent substrate, a transferred layer of a preformat pattern formed on the transparent substrate and a thin film layer formed on the transferred layer wherein at least the surface of the transferred layer in contact with the transparent substrate is made of a resin layer composed of an ultraviolet ray curable resin resulting in an optical data recording medium having a reduced absorbing moisture of the transferred layer thereof and whatever the ratio of swelling (.DELTA.d/d) is restricted to 0.1% or less.