| 摘要 |
PURPOSE:To obtain an optical data recording meadium having high reflectivity and good jitter characteristics by mounting a cyanine dye film absorbing laser beam used in order to record data and showing no change in reproduction characteristics even when data is repeatedly reproduced. CONSTITUTION:A dye film containing an indolenin type cyanin dye represented by formula I and having an absorption wavelength peak of 630 -720nm is formed on a substrate and a reflecting film having reflectivity of 60 - 100% is formed on the dye film and a protective film having the modulus of elasticity of 1 X10<9> - 1 X 10<15> dyne/cm<2> is provided on the reflecting film. In the formula I, R1 is a 2 - 6C alkyl group or a group represented by general formula -(CH2)-m 0-(CH2)-nCH3 (wherein m is an integer of 1 - 3 and n is an integer of 0 - 2), R<2> is a hydrogen atom or a 1 - 6C alkyl group, x is an integer of 0 - 4 and y is an integer of 0 - 5. By this method, an optical data recording medium having high reflectivity and good jitter characteristics is obtained. |
