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. 20, 2009
Filed:
Sep. 16, 2004
Hideki Nagano, Tsukuba, JP;
Hironori Ota, Moriya, JP;
Hideyuki Kubo, Tokyo, JP;
Takeshi Kuriwada, Tokyo, JP;
Yutaka Kurose, Tokyo, JP;
Hideki Nagano, Tsukuba, JP;
Hironori Ota, Moriya, JP;
Hideyuki Kubo, Tokyo, JP;
Takeshi Kuriwada, Tokyo, JP;
Yutaka Kurose, Tokyo, JP;
Mitsubishi Kagaku Media Co., Ltd., Tokyo, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
An information recording method allows optical information having a recording mark length smaller than a spot diameter of laser light to be recorded on an optical recording medium having a recording layer, at high density by laser light pulse application. The information recording method has: a power calibration step of determining a recording power for recording a signal having a predetermined signal length in the recording layer using the laser light; and a complementing step of complementing, based on the recording power determined in the power calibration step, a recording power for recording a signal having a signal length equal to or less than ½ of the spot diameter of the laser light in the recording layer using the laser light. In the information recording method, for example, an extremely small mark, such as a 2T signal, can be precisely formed.