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:
Dec. 28, 2010
Filed:
Jan. 31, 2007
Tsukasa Nakai, Hino, JP;
Noritake Oomachi, Yokohama, JP;
Sumio Ashida, Yokohama, JP;
Naomasa Nakamura, Yokohama, JP;
Keiichiro Yusu, Yokohama, JP;
Yasuhiro Satoh, Yokohama, JP;
Tsukasa Nakai, Hino, JP;
Noritake Oomachi, Yokohama, JP;
Sumio Ashida, Yokohama, JP;
Naomasa Nakamura, Yokohama, JP;
Keiichiro Yusu, Yokohama, JP;
Yasuhiro Satoh, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, in a phase change optical disk which has a substrate and a multi-layered including an interference film, phase change recording film, interface film, and reflecting film, and in which information is reversibly recorded in or erased from the recording film by using light, an element (e.g., Ge or Te) forming the phase change recording film has segregation or a concentration distribution in the thickness direction of the recording film from a portion in contact with the phase change recording film.