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
Motohiro Inoue, Tokyo, JP;
Takashi Kikukawa, Tokyo, JP;
Atsuko Kosuda, Tokyo, JP;
Tomoki Ushida, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
Motohiro Inoue, Tokyo, JP;
Takashi Kikukawa, Tokyo, JP;
Atsuko Kosuda, Tokyo, JP;
Tomoki Ushida, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
The multilayer optical recording medium with six or more recording and reading layers disposed one above the other has at least two or more recording and reading layer groups. The recording and reading layer groups each include a plurality of recording and reading layers successively disposed one above the other. The reflectance of each of the recording and reading layers in a stacked state decreases in the order from a front side near a light incident surface toward a back side far from the light incident surface. A recording and reading layer nearest the front side among the recording and reading layers in the recording and reading layer group nearer the back side has a reflectance in a stacked state higher than that of a recording and reading layer nearest the back side among the recording and reading layers in the recording and reading layer group nearer the front side.