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. 22, 2010
Filed:
Jun. 28, 2005
Tetsuro Mizushima, Moriguchi, JP;
Tatsuya Kato, Chuo-ku, JP;
Hiroshi Shingai, Chuo-ku, JP;
Hideaki Miura, Chuo-ku, JP;
Jiro Yoshinari, Chuo-ku, JP;
Tetsuro Mizushima, Moriguchi, JP;
Tatsuya Kato, Chuo-ku, JP;
Hiroshi Shingai, Chuo-ku, JP;
Hideaki Miura, Chuo-ku, JP;
Jiro Yoshinari, Chuo-ku, JP;
TDK Corporation, Tokyo, JP;
Abstract
A method of recording data on a double-layer optical recording medium having a recording layer with high light transmittance is provided. A laser beam is modulated to emit a pulse series of laser including a write pulse of a write power and a cooling pulse of a bottom power, so as to encode and write data to be recorded as recording marks of a length nT along a track of the recording layer, where n is an integer and T is one clock cycle. An nT recording mark is formed using (n−1) write pulse(s), and when forming a recording mark of 4 T or longer, a cooling pulse with a pulse width of 0.8 T to 2 T is inserted before the last write pulse. Recording marks are thereby accurately formed without heat interference between consecutive recording marks and cross erase between recording marks of adjacent tracks.