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:
Mar. 05, 2013
Filed:
Oct. 07, 2009
Manami Miyawaki, Kanagawa, JP;
Yuji Kuroda, Tokyo, JP;
Takashi Shimouma, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical information recording medium in which recorded information is stably stored for long time in the initial state, signals are not deteriorated by a laser beam for reproduction at the time of signal reproduction, the quality does not change in normal long-term storage, the write characteristic is held, a manufacturing cost is reduced, a margin in the manufacture process is assured, and excellent recording/reproducing characteristics are obtained in the wide range of linear speeds and recording powers is provided. An optical information recording mediumis formed by sequentially stacking a first information recording layer, an intermediate layer, a second information recording layer, and a protection layeron a substrate. As a material of a recording layerof the second information recording layer, a material having a composition expressed by [(ZnS)(SiO)](SbX)(where 0<x≦1.0, 0.3≦y≦0.7, 0.8≦z≦1.0, and X is at least one element selected from the group consisting of Ga, Te, V, Si, Zn, Ta, Sn, and Tb) is used. H