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. 08, 2008
Filed:
Oct. 27, 2004
Yutaka Wada, Miyagi, JP;
Masatsugu Suwabe, Miyagi, JP;
Toshihiro Akimori, Kanagawa, JP;
Junko Shimada, Miyagi, JP;
Keiji Oya, Saitama, JP;
Koichi Shigeno, Tokyo, JP;
Toru Yano, Chiba, JP;
Yutaka Wada, Miyagi, JP;
Masatsugu Suwabe, Miyagi, JP;
Toshihiro Akimori, Kanagawa, JP;
Junko Shimada, Miyagi, JP;
Keiji Oya, Saitama, JP;
Koichi Shigeno, Tokyo, JP;
Toru Yano, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical recording medium comprises a transmission substrate and a recording layer formed on the transmission substrate, the recording layer containing at least a dye material expressed by a general formula shown at the following chemical formula (in the chemical formula 1, R1 represents alkyl group having carbon numbers 1 to 4, R2, R3 represent alkyl group having carbon numbers 1 to 4, benzyl group or groups combined to form 3 to 6 rings, Y1 and Y2 independently represent organic groups and X represent ClO, BF, PF, SbF) and a dye material expressed by a general formula represented by the following chemical formula 2(in the chemical formula 2, R1 and R2 represent alkyl groups having carbon numbers 1 to 4, benzyl groups or groups combined to form 3 to 6 rings, Y1, Y2 independently represent organic groups and X represent ClO, BF, PF, SbF): In a write once type optical recording medium such as DVD−R and DVD+R, satisfactory recording characteristics can be obtained from low-speed recording to high-speed recording.