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. 23, 2010
Filed:
Jan. 27, 2005
Kenichi Shimomai, Mito, JP;
Kazuo Yonehara, Hitachinaka, JP;
Ikuo Matsumoto, Mito, JP;
Kenji Tokui, Hitachinaka, JP;
Hiroshi Tabata, Mito, JP;
Kenichi Shimomai, Mito, JP;
Kazuo Yonehara, Hitachinaka, JP;
Ikuo Matsumoto, Mito, JP;
Kenji Tokui, Hitachinaka, JP;
Hiroshi Tabata, Mito, JP;
Victor Company of Japan, Ltd., Kanagawa-Ken, JP;
Abstract
A phase-change optical storage medium has a substrate and a recording layer having a plurality of tracks for storing information. A material of which the recording layer is made has been initialized in a crystalline state in which an amplitude of a tracking-detection signal is smaller than a saturation value of the amplitude, the tracking-detection signal being obtained by receiving a reflected beam from the recording layer when the recording layer is irradiated with a laser beam in an off-track state while the optical storage medium is being rotated.