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:
Nov. 16, 2010
Filed:
Sep. 12, 2006
Yutaka Yamanaka, Tokyo, JP;
Shuichi Ohkubo, Tokyo, JP;
Kazuo Watabe, Kanagawa, JP;
Yutaka Kashihara, Kanagawa, JP;
Akihito Ogawa, Kanagawa, JP;
Yutaka Yamanaka, Tokyo, JP;
Shuichi Ohkubo, Tokyo, JP;
Kazuo Watabe, Kanagawa, JP;
Yutaka Kashihara, Kanagawa, JP;
Akihito Ogawa, Kanagawa, JP;
NEC Corporation, Tokyo, JP;
Abstract
A two-layer recording type optical disk capable of realizing stable recording and reproduction without being affected by another recording layer and an optical disk apparatus for the two-layer recording type optical disk are provided. In layouts of various areas in the optical disk, a position where a border between a recorded part and an unrecorded part is formed on one recording layer is set so that the position is always separated from a position where a border between a recorded part and an unrecorded part is formed on another recording layer by a predetermined clearance amount. Moreover, to a recording layer farther from an incident surface, test recording or data recording is always performed through a recorded part on a closer recording layer.