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:
Jun. 14, 2011
Filed:
Jan. 22, 2008
Hiroshi Shingai, Tokyo, JP;
Tatsuya Kato, Tokyo, JP;
Masanori Kosuda, Tokyo, JP;
Hiroshi Takasaki, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
Hajime Utsunomiya, Tokyo, JP;
Hiroshi Shingai, Tokyo, JP;
Tatsuya Kato, Tokyo, JP;
Masanori Kosuda, Tokyo, JP;
Hiroshi Takasaki, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
Hajime Utsunomiya, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A next-generation optical recording medium has two or more information layers which include a translucent information layer. The translucent information layer has a recording film and an interface layer, provided adjacent to the recording film on the side of the light incident surface. The recording film is made of a phase change material having SbTeGeelements and elemental ratios. Y satisfies 5≦y≦15 and z satisfies 5≦z≦15. When In having an elemental ratio of a is further added and x+y+z+a=100 holds, a satisfies 4≦a≦15. The interface layer comprises of ZrO—CrOfilm thickness of which is in a range of from 2 nm to 10 nm. When ZrO:CrO═C:D (mol %), the compositional ratios ZrOand CrOin the ZrO—CrOfilm, holds, the C satisfies 20≦C≦90, and the D satisfies 10≦D≦80, and the C and the D satisfy C+D=100. The ZrOis stabilized ZrOwhich contains YO, when ZrO:YO=(100−X):X (mol %), the compositional ratios ZrOand YOin the stabilized ZrO, holds, the X satisfies 2≦X≦10.