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:
Feb. 08, 2000
Filed:
Feb. 27, 1998
Applicant:
Inventors:
Kazuhiro Kaneko, Tochigi-ken, JP;
Tomohiro Onda, Tochigi-ken, JP;
Assignee:
Kao Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428 641 ; 428 642 ; 428 644 ; 428 645 ; 428913 ; 43027013 ; 4304951 ; 430945 ; 369283 ; 369288 ;
Abstract
The present invention aims at improving C/N, erasing ratio, modulation factor, recording sensitivity, and recording/erasing repeatability characteristics of a phase-change type optical recording medium. The recording layer of the optical recording medium is therefore formed of a chalcopyrite type compound having a composition represented by the formula: