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:
Jan. 31, 2012
Filed:
Jan. 26, 2007
Yutaka Wada, Miyagi, JP;
Masatsugu Suwabe, Miyagi, JP;
Toru Yano, Chiba, JP;
Koichi Shigeno, Tokyo, JP;
Yutaka Wada, Miyagi, JP;
Masatsugu Suwabe, Miyagi, JP;
Toru Yano, Chiba, JP;
Koichi Shigeno, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Adeka Corporation, Tokyo, JP;
Abstract
Recording and reproducing characteristics and data saving reliability are secured in a write-once two-layer recording medium. A second recording layer from a side irradiated with light for recording and reproduction includes organic dye shown by a general formula of a chemical formula 3 described below (in the formula, R1 and R2 are alkyl groups of carbon number 1 to 4; Y1, Y2 respectively are organic groups independently; and X is Cl0, BF, PF, SbF), and organic dye shown by a general formula of a chemical formula 4 described below (in the formula, R1, R4 are alkyl groups of carbon number 1 to 4; R2, R3 are alkyl groups of carbon number 1 to 4 or groups forming 3 to 6 membered rings by being coupled; Y1, Y2 respectively are organic groups independently; and X is Cl0, BF, PF, SbF), to secure durability.