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. 15, 2012
Filed:
May. 23, 2007
Kazuyo Umezawa, Yokohama, JP;
Seiji Morita, Yokohama, JP;
Koji Takazawa, Tokyo, JP;
Hideo Ando, Hino, JP;
Yasuaki Ootera, Yokohama, JP;
Naomasa Nakamura, Yokohama, JP;
Naoki Morishita, Yokohama, JP;
Kazuyo Umezawa, Yokohama, JP;
Seiji Morita, Yokohama, JP;
Koji Takazawa, Tokyo, JP;
Hideo Ando, Hino, JP;
Yasuaki Ootera, Yokohama, JP;
Naomasa Nakamura, Yokohama, JP;
Naoki Morishita, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a re-recordable write-once optical disc by which recording/reproducing can be properly done with a short-wavelength blue laser is provided. The disc has recording layers on which marks are recorded by the laser power of a modulated short wavelength, with a space formed between the recorded marks. The recording layer of the disc uses an organic dye material by which no physical modification or no physical change substantially occurs in an area of the recorded marks.