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:
Oct. 23, 1990
Filed:
Dec. 19, 1989
Applicant:
Inventors:
Minoru Ikeda, Kurashiki, JP;
Masaki Ishii, Kurashiki, JP;
Hiroshi Ono, Kurashiki, JP;
Koichi Saito, Kurashiki, JP;
Assignee:
Kuraray Company, Ltd., Kurashiki, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428207 ; 428412 ; 428421 ; 428422 ; 428457 ; 4284744 ; 428480 ; 428913 ; 346 / ; 3461351 ; 3692751 ; 369288 ;
Abstract
An optical recording medium of a substrate and a thin metal film laminated thereon formed of a noble metal (A), a chalcogen (B) and bismuth (C) as essential components in amounts within the region of the phase diagram of FIG. 1 defined by the points: a; (A.sub.80 B.sub.15 C.sub.5), b; (A.sub.15 B.sub.80 C.sub.5), c; (A.sub.2 B.sub.80 C.sub.18), d; (A.sub.2 B.sub.49 C.sub.49) and e; (A.sub.80 B.sub.10 C.sub.10), said medium capable of absorbing a laser beam of a specific wavelength region thereby recording information by the pits of cavities formed in the film by the laser beam.