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. 29, 2000
Filed:
Sep. 30, 1998
Applicant:
Inventors:
Jiro Yoshinari, Nagano, JP;
Masanori Kosuda, Nagano, JP;
Hiroshi Shingai, Nagano, JP;
Takashi Kikukawa, Nagano, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; B32B / ;
U.S. Cl.
CPC ...
3692752 ; 369288 ; 428 641 ;
Abstract
An optical recording medium comprising a substrate, at least one dielectric layer and a phase change type recording layer. In overwriting, the recording medium should satisfy the condition V.sub.OW /V.sub.OP <1, preferably 0.5.ltoreq.V.sub.OW /V.sub.OP <0.95, where V.sub.OP is the optimum linear velocity and V.sub.OW is a linear velocity for overwriting. This enables the erasability of recorded marks on the medium to be at least 26 dB after the recording medium with the recorded marks has been stored for at least 100 hours at 60 to 80.degree. C.