Patent number: 7691463
Abstract: A rewritable phase change optical recording medium includes a substrate, a dielectric layer deposited on a surface of the substrate, and an optical recording layer deposited on the dielectric layer, wherein the dielectric layer may be omitted. The optical recording layer contains a composition of GexSb100-x-y-zMyEz, wherein 0.5?x?14.5; 0.5?y?14.5; 0?z?14.5; and M and E are different and are selected from the group consisting of Te, Cr, V, Ti, Ag, Sn, Si, Bi, Se, Al, Au, Ni, Fe, Cu, Mn, O, Ga, Cd, In, Pb and Hf, wherein M is not Te, when x is zero; and E is not Sn, when M is Te. The optical recording composition has a small crystal grain, a high ratio of reflectivity of the amorphous phase to that of the crystalline phase thereof, and a high crystallization rate, so that a blue light laser can be used to write/erase the recording medium.
Type:
Grant
Filed:
November 24, 2004
Date of Patent:
April 6, 2010
Assignee:
Industrial Technology Research Institute
Inventors:
Lih-Hsin Chou, Mei-Rurng Tseng, Chung-Chih Chang, Chin-Chi Chang, Shun-Te Cheng, Chien-Ming Huang, Feng-Pin Hsu, Wei-Chih Hsu, Song-Yeu Tsai, Ming-Hsun Hsieh