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:
Jul. 25, 2006
Filed:
Jul. 13, 2005
Harukazu Miyamoto, Kodaira, JP;
Yoshio Suzuki, Fujisawa, JP;
Motoyuki Suzuki, Yokohama, JP;
Hisataka Sugiyama, Kodaira, JP;
Hiroyuki Minemura, Yokohama, JP;
Tetsuya Fushimi, Chigasaki, JP;
Nobuhiro Tokushuku, Yokohama, JP;
Harukazu Miyamoto, Kodaira, JP;
Yoshio Suzuki, Fujisawa, JP;
Motoyuki Suzuki, Yokohama, JP;
Hisataka Sugiyama, Kodaira, JP;
Hiroyuki Minemura, Yokohama, JP;
Tetsuya Fushimi, Chigasaki, JP;
Nobuhiro Tokushuku, Yokohama, JP;
Hitachi, Ltd., Tokyo, unknown;
Abstract
A recording method for an optical medium having a disk-like substrate, a plurality of tracks extending in a circumferential direction on the substrate and associated with a plurality of grooves, and a plurality of zones being provided on the disk-like substrate and extending between a first position and a second position in a radial direction of the substrate. Each zone including at least two tracks, and each track being divided into a plurality of units of circular arc shape extending in the circumferential direction with radially adjacent units of a respective zone being delimited by a pair of radial lines joined to form a central angle at an apex proximate to a center of the substrate. The method includes providing the optical medium, and recording information on the optical medium by irradiating an optical spot thereon.