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:
Sep. 20, 2011
Filed:
May. 04, 2007
Shuichi Ohkubo, Tokyo, JP;
Shuichi Ohkubo, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A method is provided for manufacturing an optical data recording medium including a plurality of data recording layers each having a user data recording region and a BCA formation region positioned at an inner position than the data recording region. The method includes: forming a first data recording layer out of the plurality of data recording layers on a first substrate; forming a second data recording layer out of the plurality of data recording layers on a second substrate; forming a BCA pattern within the BCA formation region of the second data recording layer to record burst cut data; and bonding the first and second substrates after the BCA pattern is formed.