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:
Jul. 10, 2012
Filed:
Jun. 03, 2009
Kotaro Kurokawa, Kanagawa, JP;
Kotaro Kurokawa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical information recording medium is provided and includes a supporting substrate, a light-transmissive protective layer, information recording layers, and at least one interlayer transparent to a laser beam having a wavelength of 400 to 410 nm. Among the information recording layers, one or a plurality of information recording layers other than the information recording layer closest to the supporting substrate each function as a semi-transmissive information recording layer that transmits the laser beam. Some or all of the one or the plurality of semi-transmissive information recording layer include, from the laser beam incident side, a first dielectric portion having a refractive index of 2.4 or more for the wavelength of the laser beam, a recording material portion having a thickness of at least 5.2 nm, a second dielectric portion, a metal portion having a thickness of at least 7 nm, and a third dielectric portion in that order.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile