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. 17, 2012
Filed:
Jan. 13, 2010
Hiroshi Uchiyama, Miyagi, JP;
Yusuke Suzuki, Miyagi, JP;
Takao Kudo, Miyagi, JP;
Katsumi Miura, Miyagi, JP;
Hiroshi Uchiyama, Miyagi, JP;
Yusuke Suzuki, Miyagi, JP;
Takao Kudo, Miyagi, JP;
Katsumi Miura, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical information recording medium includes a recording layer that includes a mark layer in which recording marks formed in accordance with condensed recording light are aligned and has a recording light absorption amount of 20.8% or less with respect to an innermost depth as a depth of the mark layer from a side thereof that the recording light enters to a side thereof that is most distant from the side that the recording light enters, and a change amount of a light absorption amount with respect to measurement light having a wavelength 10 nm shorter than that of the recording light at a time a light absorption amount with respect to measurement light having the same wavelength as the recording light is used as a reference, of 8.0% or more per 0.30 mm.