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:
Dec. 02, 2008
Filed:
Jan. 09, 2007
Seiji Kobayashi, Kanagawa, JP;
Toshihiro Fujiki, Tokyo, JP;
Seiji Kobayashi, Kanagawa, JP;
Toshihiro Fujiki, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
Described herewith is an optical disk manufacturing apparatus for reading recorded digital data from an optical disk, comprising an encryption unit () for encrypting entered digital data according to a plurality of key information; an optical disk substrate manufacturing unitfor manufacturing an optical disk substrateon which the encrypted digital data and key information are recorded in the form of physical form changes; a reflection film forming unitfor forming a reflection film on the optical disk substrateand a key information recording unitfor recording key information on the optical disk substrate on which the reflection film is formed. The reflection factor of the optical disk is changed locally, thereby giving a jitter to the position information of each pit edge, and desired data is recorded additionally according to this jitter. Pits, etc. are disposed so as to be deviated from the track center towards the inner/outer region of the optical diskthereby recording such sub-data as key information KY, etc.