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. 26, 2011
Filed:
Dec. 30, 2003
Koji Mishima, Tokyo, JP;
Hiroyasu Inoue, Tokyo, JP;
Tsuyoshi Komaki, Tokyo, JP;
Daisuke Yoshitoku, Tokyo, JP;
Hitoshi Arai, Tokyo, JP;
Kenji Yamaga, Tokyo, JP;
Hironori Kakiuchi, Tokyo, JP;
Koji Mishima, Tokyo, JP;
Hiroyasu Inoue, Tokyo, JP;
Tsuyoshi Komaki, Tokyo, JP;
Daisuke Yoshitoku, Tokyo, JP;
Hitoshi Arai, Tokyo, JP;
Kenji Yamaga, Tokyo, JP;
Hironori Kakiuchi, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
An optical recording medium includes a substrate and a plurality of recording layers laminated via at least intermediate layers, at least one of the recording layers other than a recording layer farthest from a light incidence plane among the plurality of recording layers containing at least one metal M selected from a group consisting of Ni, Cu, Si, Ti, Ge, Zr, Nb, Mo, In, Sn, W, Pb, Bi, Zn and La and an element X which can combine with the metal M upon being irradiated with a laser beam for recording data, thereby forming a crystal of a compound of the element X with the metal M. According to the thus constituted optical recording medium, it is possible to record data in and reproduce from a farthest recording layer from a light incidence plane in a desired manner and it is possible to record data in and reproduce from recording layer(s) other than the farthest recording layer from the light incidence plane in a desired manner.