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:
May. 17, 2011
Filed:
Mar. 13, 2008
Hiroshi Shingai, Tokyo, JP;
Tatsuya Kato, Tokyo, JP;
Masanori Kosuda, Tokyo, JP;
Hiroshi Takasaki, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
Jajime Utsunomiya, Tokyo, JP;
Hiroshi Shingai, Tokyo, JP;
Tatsuya Kato, Tokyo, JP;
Masanori Kosuda, Tokyo, JP;
Hiroshi Takasaki, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
Jajime Utsunomiya, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
An optical recording medium is provided which includes two or more information layers in which an Sb-based eutectic material is used as the material for a recording film of a translucent information layer. There is also provided a recording film material for the optical recording medium. The translucent information layer is configured to include a recording film formed of a phase change material SbGeIncontaining Sb, Ge, and In in an atomic ratio of x:y:z, where 5≦y≦15 and 4≦z≦15 are satisfied. The recording film further includes Te in an atomic ratio of a, provided that x+y+z+a=100 and 4≦a≦15 are satisfied. An interface layer formed of a ZrO—CrOfilm having a thickness of 2 nm or more and 10 nm or less is provided on the laser beam incident side of the recording film. When the compositional ratio of the ZrO—CrOfilm is given by ZrO:CrO=B:C (mol %), 20≦B≦90, 10≦C≦80, and B+C=100 are satisfied.