| 摘要 |
PURPOSE:To easily attain a recording state in which high reproduction CNR is obtd. by the irradiation of a low-power light beam by using a film which forms build-up deformed parts when irradiated with a beam for recording as a recording film and specifying the elongation rate of the material of an org. intermediate layer. CONSTITUTION:This optical card is formed by successively laminating a transparent org. substrate 1, the recording film 2, the org. intermediate layer 3, and an org. protective plate 4. The build-up deformed parts 5 are formed to the recording film 2 when the film is irradiated with the beam for recording. The recording state in which the high CNR is obtd. by the irradiation of the low-power light beam is easily attained by using such recording film 3. The decrease of the recording sensitivity of the recording film is suppressed and the adhesive strength to the org. protective plate 4 is assured by using the material having the elongation rate ranging 5-100% for the org. intermediate layer 3. |
