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:
Jun. 21, 2011
Filed:
Jan. 05, 2009
Shin Masuhara, Tokyo, JP;
Jun Nakano, Tokyo, JP;
Shin Masuhara, Tokyo, JP;
Jun Nakano, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical recording medium wherein characters can be easily recognized on an optical disk irradiated with a light through a light transmitting layer and a method of producing the same are provided. In an optical disk of a type that an optical recording layer is irradiated with a light through a light transmitting protective layer, dealing with a larger capacity, wherein one main surface of a medium substrateis divided to a signal portion SG and a character portion CA, a signal portion uneven shape () is formed on the signal portion SG and a character portion uneven shape () is formed on the character portion CA, and depths of the signal portion uneven shape and the character portion uneven shape are 25 nm or less. Here, it is configured that characters are recorded to be able to be read as normal characters when looking from the medium substrateside (Y-direction) by outlines of a region formed with the character portion uneven shape on the character portion CA.