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. 14, 2008
Filed:
May. 20, 2004
Joo-ho Kim, Yongin-si, KR;
In-sik Park, Gyeonggi-do, KR;
Masashi Kuwahara, Tsukubasi, JP;
Junji Tominaga, Tsukubasi, JP;
Takayuki Sima, Tsukubasi, JP;
Joo-ho Kim, Yongin-si, KR;
In-sik Park, Gyeonggi-do, KR;
Masashi Kuwahara, Tsukubasi, JP;
Junji Tominaga, Tsukubasi, JP;
Takayuki Sima, Tsukubasi, JP;
Samsung Electronics Co., Ltd., Suwon-si, KR;
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Abstract
A multi-layer structure whose volume changes when a temperature exceeds a predetermined threshold value, a microscopic structure drawing method that involves emitting a laser beam onto the multi-layer structure to create a temperature distribution within a beam spot and performing microscopic recording on a portion of the beam spot having a temperature higher than the threshold value, an optical disc master, and a mastering method using the same, where the multi-layer structure includes a substrate and a transformation layer formed on the substrate, wherein a volume of a portion of the transformation layer irradiated by a laser beam changes when the temperature of the portion exceeds a predetermined temperature. The microscopic structure drawing method includes emitting the laser beam onto a predetermined region of the transformation layer and heating the region of the transformation layer irradiated by the laser beam beyond a predetermined temperature so that the heated region can undergo a volume change.