| 摘要 |
PURPOSE:To obtain a recording medium which permits recording and reproduction by the use of an inexpensive light source such as semiconductor laser and has a good shelf life by depositing a thin film contg. the metallic napthalocyanine expressed by the specific formula or the deriv. thereof on a base material. CONSTITUTION:The thin film contg. the metallic napthalocyanine expressed by the formula or the deriv. thereof is deposited on the base material. Since the metallic napthalocyanine has a low m.p., the vapor deposition temp. can be made lower. This medium permits recording and reproduction by using the compact and relatively inexpensive light source such as semiconductor laser or He-Ne laser, has excellent long-term shelf stability, obviates the photodeterioration by reproducing light, has high sensitivity, is safe and can be discarded as it is. The higher reflectivity is obtd. and the S/N ratio is improved by laminating the above-mentioned thin film and thin film contg. a dye having metallic brightness on the base material in optional order. |
