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:
Feb. 13, 2007
Filed:
Apr. 22, 2003
Katsuhlsa Aratani, Chiba, JP;
Shinji Minegishi, Shizuoka, JP;
Makoto Tsukahara, Shizuoka, JP;
Sony Corporation, Tokyo, JP;
Sony Disc Technology, Inc., Tokyo, JP;
Abstract
An optical recording medium, with a construction and a manufacturing method thereof corresponding to those of a read-only optical recording medium and which can be manufactured inexpensively, which enables additional recording of the above-described codes, marks, and other new information, which can be recorded reliably and has satisfactory characteristics, is provided. A construction is adopted in which the optical recording medium S has an information layerincluding a portion in which information is recorded by physical shape changes in, at least, the thickness direction or the track width direction, and which comprises a reflective film; the reflective film is formed of Al alloy or Cu alloy with an electrical resistivity of 20 μΩ·cm or more and 90 μΩ·cm or less, and information can be additionally recorded on the reflective filmby thermal recording.