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:
May. 29, 2012
Filed:
Jun. 15, 2007
Tetsuhiro Sakamoto, Tokyo, JP;
Jun Nakano, Tokyo, JP;
Naoki Okawa, Tokyo, JP;
Junichi Nakai, Hyogo, JP;
Yuki Tauchi, Hyogo, JP;
Tetsuhiro Sakamoto, Tokyo, JP;
Jun Nakano, Tokyo, JP;
Naoki Okawa, Tokyo, JP;
Junichi Nakai, Hyogo, JP;
Yuki Tauchi, Hyogo, JP;
Sony Corporation, Tokyo, JP;
Kabushiki Kaisha Kobe Seiko Sho, Hyogo, JP;
Abstract
A pirated optical recording medium may be determined which is produced by physically transferring a shape of pits and lands formed on a substrate of an optical recording medium. The optical recording medium is provided with excellent weatherability and long-term storage reliability. A reflective film formed of an Ag alloy film of AgXCu, where X is at least one element among Ti, W, Ta, V, Mo, Nb and Zr, is formed on a substrate on which main data is recorded with a combination of pits and lands. A mark may be formed so that a reproduction signal level in the recorded mark of auxiliary data write once recorded on the reflective film is increased, and a reproduction signal level is decreased in an optical recording medium prepared by physically transferring the surface shape of the pits and lands of the substrate. A pirated optical recording medium may be determined in this manner.