Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yasuhiro Satoh0
Noritake Oomachi0
Sumio Ashida0
Tsukasa Nakai0
Keiichiro Yusu0
Naomasa Nakamura0
Date of Patent
December 28, 2010
Patent Application Number
11669406
Date Filed
January 31, 2007
Patent Primary Examiner
Patent 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.
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