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:
Apr. 06, 2004
Filed:
Nov. 30, 2001
Hiroshi Tabata, Mito, JP;
Victor Company of Japan, , JP;
Abstract
An optical recording medium comprises a substrate , first protective layer , interfacial layer , recording layer , second protective layer , light absorbing and heat generating layer , third protective layer , reflection layer and a protective film laminated in order. The light absorbing and heat generating layer is a metal layer or an alloy layer containing more than one element out of Ge, Sn, Pb, Cr, Ti, In, Si, Cd, Se, W, Mo, Zr, Nb, Zn and Hf, so that a reflectivity of the optical recording medium and an optical modulation factor, which is an optical modulation factor in a phase changing state of crystalline or amorphous, in the recording layer can be always maintained in high. Accordingly, a recording sensitivity of the recording layer in the optical recording medium can be increased without deteriorating a characteristic such as reflectivity and jitter.