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:
Aug. 21, 2001
Filed:
Jun. 15, 1999
Donyau Chiang, Hsinchu Hsien, TW;
Tzuan-Ren Jeng, Tou-Liu, TW;
Der-Ray Huang, Hsinchu, TW;
Tsung-Shune Chin, Hsinchu, TW;
Yi-Yuan Huang, Chang-Hua, TW;
Chyan-Ming Lee, Kao-Hsiung, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
This invention relates to a rewritable optical information recording medium of the phase-change type, which is made of a Te—Ge—Sb—B quaternary alloy. The optical contrast of the recording medium according to the present invention is enhanced over 35% in the visible wavelength range of 350 nm to 800 nm. Hence, the CNR of an optical disk with the recording medium of the present invention is increased, and the recording medium is suitable for optical information record operated in shorter visible wavelength. In addition, since the crystallization of the recording medium according to the present invention is single-phase, the performance of the repeated recording and erasing is enhanced.