| 摘要 |
PURPOSE:To improve recording sensitivity, to stabilize a recording layer and to improve signal contrast by depositing successively the 1st layer having light absorptivity and light coherence, a recording layer performing information recording by laser light and the 2nd layer having light absorptivity on a transparent base plate. CONSTITUTION:Soda lime glass subjected to a treatment is used as a discshaped transparent base plate. The 1st layer is deposited on the soda lime glass by glow-discharging gaseous ethylene under the specific gaseous pressure by using high frequency power and depositing at the same time copper phthalocyanine by evaporation as a material having absorptivity with a semiconductor laser on the soda lime glass. The film thickness of the 1st layer 7 is so set that the reflectivity is maximized by light coherence and that the effect of heat insulation is obtd. A recording layer 8 having a specific film thickness is deposited by vacuum deposition using tellurium of high purity on the layer 7. The 2nd layer 9 is deposited on the layer 8 by glow-discharging the gaseous ethylene by and under the method and conditions similar to the layer 1 and depositing at the same time tellurium by evaporation thereon. |
