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. 01, 2005
Filed:
Mar. 06, 2003
Tatsuo Mikami, Kanagawa-ken, JP;
Tohru Yashiro, Kanagawa-ken, JP;
Tomomi Ishimi, Kanagawa-ken, JP;
Takuo Ohishi, Kanagawa-ken, JP;
Tatsuo Mikami, Kanagawa-ken, JP;
Tohru Yashiro, Kanagawa-ken, JP;
Tomomi Ishimi, Kanagawa-ken, JP;
Takuo Ohishi, Kanagawa-ken, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical recording medium is described, having suitable recording characteristics over a wide range of recording linear speed and fitting with recording/reproduction apparatuses of CD-R specifications. The optical recording medium includes a substrate having at least a light absorbing layer thereon, which is mainly composed of three phthalocyanine compounds (I), (II) and (III). Each of the phthalocyanine compounds (I) and (II) has a thermal decomposition temperature of from 200° C. to 300° C., and has a different light absorption ability against light having a wavelength of 780 nm. The phthalocyanine compound (III) has a thermal decomposition temperature of from 300° C. to 350° C.