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:
Apr. 24, 2012
Filed:
Dec. 13, 2005
Toshishige Fujii, Yokohama, JP;
Noboru Sasa, Yokohama, JP;
Yoshitaka Hayashi, Yokohama, JP;
Hiroshi Miura, Yokohama, JP;
Masayuki Fujiwara, Yokohama, JP;
Toshishige Fujii, Yokohama, JP;
Noboru Sasa, Yokohama, JP;
Yoshitaka Hayashi, Yokohama, JP;
Hiroshi Miura, Yokohama, JP;
Masayuki Fujiwara, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The present invention provides a write-once-read-many optical recording medium comprising a substrate, a recording layer comprising any one of bismuth and an oxide of bismuth, an overcoat layer and a reflective layer in this order from a laser beam incident plane, wherein the write-once-read-many optical recording medium has a reflectivity of 35% or less when a laser is applied to the flat part of the substrate or a write-once-read-many optical recording medium comprising a substrate, an undercoat layer, a recording layer comprising any one of bismuth and an oxide of bismuth, an overcoat layer and a reflective layer in this order from a laser beam incident plane, wherein the write-once-read-many optical recording medium has a reflectivity of 35% or less when a laser is applied to the flat part of the substrate.