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:
Dec. 13, 2005
Filed:
Nov. 03, 2003
Kiyoshi Uchida, Kitakatsuragi-gun, JP;
Yasumori Hino, Ikoma, JP;
Motoyoshi Murakami, Hirakata, JP;
Norio Miyatake, Kobe, JP;
Kiyoshi Uchida, Kitakatsuragi-gun, JP;
Yasumori Hino, Ikoma, JP;
Motoyoshi Murakami, Hirakata, JP;
Norio Miyatake, Kobe, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An optical disk of the present invention includes a substrate and a recording layer disposed above the substrate, and reproduces an information signal by a DWDD system, using light incident from the substrate side. The optical disk further includes a first dielectric layer disposed between the substrate and the recording layer and a second dielectric layer disposed on the recording layer opposite to the substrate, wherein the recording layer is initialized with light having a wavelength λ incident from the second dielectric layer side, and the thickness of the second dielectric layer is in a range of λ/(12×n) to λ/(2×n) (where n is a refractive index of the second dielectric layer).