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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.:

US 4645712 B1

PDFFull Text
Date of Patent:
Feb. 24, 1987

Filed:

Nov. 06, 1985

Information recording medium

Applicant:
Inventors:

Masaji Ishigaki, Kanagawa, JP;

Tetsu Ohishi, Kanagawa, JP;

Nobuhiro Tokusyuku, Kanagawa, JP;

Yoshie Kodera, Kanagawa, JP;

Yukio Fukui, Tokyo, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:

Antonelli, Terry & Wands

Primary Examiner:

P C Ives

Int. Cl.
CPC ...
B32B / ; G01D / ;
U.S. Cl.
CPC ...
428433 ; 428463 ; 428913 ; 428699 ; 3461351 ;
Abstract

A information recording medium has characteristics of high sensitivity and high density. The medium has a double layer formed on a transparent substrate, the double layer comprising a highly transparent recording layer, for example, Sb.sub.2 Se.sub.3 layer and a highly reflective layer, for example, Bi layer. The highly transparent recording layer includes Bi so as to set a minimum value of a reflection factor in prerecording 8 to 16 percentages.

Find Patent Forward Citations

Ishigaki, Masaji. (1987). Information recording medium (U.S. Patent No. 4645712). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4645712

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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