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:
Jan. 19, 2010
Filed:
Nov. 20, 2003
Shinichi Kai, Tokyo, JP;
Akira Kouchiyama, Kanagawa, JP;
Katsuhisa Aratani, Chiba, JP;
Kenzo Nakagawa, Kanagawa, JP;
Yoshihiro Takemoto, Tokyo, JP;
Shinichi Kai, Tokyo, JP;
Akira Kouchiyama, Kanagawa, JP;
Katsuhisa Aratani, Chiba, JP;
Kenzo Nakagawa, Kanagawa, JP;
Yoshihiro Takemoto, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
The method of the present invention includes an exposing step in which a laser beam for recording modulated by an information signal corresponding to an information signal of an information concave and convex pattern formed on the optical disc is applied to an inorganic resist layerformed on a substrateto form an exposed pattern corresponding to the information concave and convex pattern on the optical disc, and a development step in which a concave and convex pattern corresponding to the information concave and convex pattern by the inorganic resist layer is formed. By applying a laser beam for estimation to a predetermined area on the inorganic resist layer in the exposing step to estimate recorded signal characteristics of the exposed pattern by the inorganic resist layer using reflected light of the laser beam for estimation, and controlling power of the laser beam for recording based on the estimated result, the aimed information recording on the optical disc can reliably be obtained.