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:
Oct. 11, 2011
Filed:
Feb. 14, 2003
Hideaki Miura, Tokyo, JP;
Tatsuya Kato, Tokyo, JP;
Hideaki Miura, Tokyo, JP;
Tatsuya Kato, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
It is an object of the present invention to provide an information recording method for recording information in a data rewritable type optical recording medium having a plurality of information recording layers, which can form recording marks having good shapes. In the information recording method according to the present invention, information is recorded in an optical recording mediumhaving at least a stacked L0 layerand L1 layerby projecting a laser beam thereonto whose power is modulated between a plurality of powers including at least a recording power (Pw) and an erasing power (Pe) via a light incidence plane. When information is recorded, λ/NA is set to be equal to or shorter than 700 nm, where λ is a wavelength of the laser beam and NA is a numerical aperture (NA) of an objective lens, and a ratio (Pe/Pw) of the recording power and the erasing power when information is to be recorded in the L0 layeris set to be smaller than that when information is to be recorded in the L1 layer