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. 09, 2006
Filed:
Jul. 09, 2002
Michiaki Shinotsuka, Kanagawa, JP;
Hiroyuki Iwasa, Kanagawa, JP;
Takao Yamada, Tokushima, JP;
Toshio Matsushita, Tokushima, JP;
Yasuo Kanbara, Tokushima, JP;
Shigeki Okauchi, Tokushima, JP;
Michiaki Shinotsuka, Kanagawa, JP;
Hiroyuki Iwasa, Kanagawa, JP;
Takao Yamada, Tokushima, JP;
Toshio Matsushita, Tokushima, JP;
Yasuo Kanbara, Tokushima, JP;
Shigeki Okauchi, Tokushima, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The present invention relates to a phase-change optical information recording medium comprising a recording layer which reversibly phase-changes between the crystalline phase and the amorphous phase by irradiation of a light having a recording wavelength of 390 to 430 nm, and a light transmittance thermally controllable layer showing a light transmittance varying according to temperature, in which the light transmittance increases at a rate of 0.2 to 0.7% /10° C.