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. 21, 1995
Filed:
Jul. 15, 1993
Applicant:
Inventors:
Hiroyuki Arioka, Nagana, JP;
Koji Yasukawa, Nagana, JP;
Junji Tominaga, Nagana, JP;
Atsuko Motai, Nagana, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
430271 ; 430270 ; 430495 ; 430945 ; 3461351 ; 369283 ; 369288 ;
Abstract
In an optical recording disk comprising a substrate, a dye base recording layer, and a reflective layer, the recording layer contains a metal complex having a center metal, and the reflective layer is formed of an alloy of at least two metal elements wherein the total content of a metal element(s) having ionization tendency equal to or greater than the center metal is limited to 0 to 10% by weight. This minimizes reaction between metals in the recording and reflective layers, maintaining the disk reliable.