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:
Aug. 27, 2013
Filed:
Oct. 20, 2011
Takashi Kikukawa, Tokyo, JP;
Motohiro Inoue, Tokyo, JP;
Atsuko Kosuda, Tokyo, JP;
Tomoki Ushida, Tokyo, JP;
Takashi Kikukawa, Tokyo, JP;
Motohiro Inoue, Tokyo, JP;
Atsuko Kosuda, Tokyo, JP;
Tomoki Ushida, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
The multilayer optical recording medium with at least four or more recording and reading layers disposed one above the other has at least two or more recording and reading layer groups each including the recording and reading layers successively disposed one above the other. In adjacent recording and reading layer groups with an intermediate layer interposed therebetween, a recording and reading layer nearest a front side in the recording and reading layer group nearer a back side is higher than the higher value of the reflectances in a stacked state of two recording and reading layers nearest the back side in the recording and reading layer group nearer the front side.