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:
Apr. 06, 2004
Filed:
Jul. 12, 2002
Masayoshi Nagata, Kanagawa, JP;
Motoyasu Yumita, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
In an optical recording medium of a recording format to record data on both lands and grooves in such a manner that a recording area is divided into a plurality of zones, and headers arranged continuously in radial directions in the same zone are not arranged in the same radial directions over a zone boundary, and the headers are so arranged as to be shared by the lands and the grooves, the headers arranged within three or more physical tracks from said zone boundary are cleared and grooved. Thereby, noise is prevented from occurring in a tracking error signal about the time from the occurrence of noise, which occurs in the tracking error signal and causes landing, until a tracking servo is performed, thus making it possible to enhance the stability of landing traversing a zone boundary.