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. 07, 2006
Filed:
Apr. 20, 2004
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, JP;
Abstract
An information recording method for a recording medium including a spiral or concentric-shaped groove structure along tracks formed on a disk-like substrate, wherein each of the tracks is divided into a plurality of recording units. Each of the recording units includes a blank portion in a circumferential direction of the groove structure, the blank portion being a non-groove portion, the groove structure being formed with a wobble in a fixed cycle in a radial direction, the fixed cycle of the wobble continuing in the circumferential direction along the track, and each length of the recording units is an integer multiple of the cycle of the wobble. The method includes irradiating a light beam to the recording medium, and recording information to the recording medium.