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:
Jun. 27, 2006
Filed:
Jul. 07, 2005
Hiroko Ohkura, Sagamihara, JP;
Yoshiyuki Kageyama, Yokohama, JP;
Makoto Harigaya, Hiratsuka, JP;
Hajime Yuzurihara, Odawara, JP;
Eiko Hibino, Yokohama, JP;
Hiroshi Miura, Yokohama, JP;
Miku Mizutani, Kumagaya, JP;
Hiroko Ohkura, Sagamihara, JP;
Yoshiyuki Kageyama, Yokohama, JP;
Makoto Harigaya, Hiratsuka, JP;
Hajime Yuzurihara, Odawara, JP;
Eiko Hibino, Yokohama, JP;
Hiroshi Miura, Yokohama, JP;
Miku Mizutani, Kumagaya, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An information recording method including irradiating a phase change recording layer of an optical recording medium with either a multi-pulse laser light train having a recording power of Pw or laser light having an erasing power Pe to record a mark having a length nT in the recording layer, wherein n is an integer of from 3 to 14 and T represents a clock cycle, wherein the multi-pulse laser light train has a constitution such that a heating pulse and a cooling pulse are alternated and the number of heating pulses and the number of cooling pulses each increases by 1 when n increases by 2, and wherein when n is from 6 to 14, the last heating pulse and last cooling pulse have a pulse width of from 0.5T to 0.9T and from 0.7T to 1.5T, respectively.