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:
Oct. 31, 2006
Filed:
Jun. 21, 2002
Takeshi Kakuta, Kanagawa, JP;
Shinji Saito, Kanagawa, JP;
Toshio Ishida, Kanagawa, JP;
Takako Ozawa, Kanagawa, JP;
Hiroaki Doushita, Kanagawa, JP;
Takeshi Kakuta, Kanagawa, JP;
Shinji Saito, Kanagawa, JP;
Toshio Ishida, Kanagawa, JP;
Takako Ozawa, Kanagawa, JP;
Hiroaki Doushita, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
The present invention provides an optical information recording medium that includes a substrate including a groove with a track pitch of 200 to 400 nm and a groove depth of 20 to 150 nm and having successively disposed thereon a light reflecting layer, a recording layer containing a dye in which information is recorded by irradiation with a laser beam having a wavelength of no greater than 450 nm, an adhesive layer, and a cover layer with a thickness of 0.01 to 0.5 mm. A surface of the optical information recording medium on a side disposed with the cover layer has a center surface average roughness (SRa) of no greater than 3.0 nm when measured over a large surface area and a center surface average roughness (SRa) of no greater than 3.0 nm when measured over a minute surface area.