| 摘要 |
PURPOSE:To lower a noise level and to improve recording and reproducing characteristics by making an adhesive opaque, using an air-permeable adhesive sheet, and providing an optical interface separating layer consisting of a transparent material between a base body and a recording member. CONSTITUTION:A recording member such as a chalcogen compd. 2 whose reflectance is changed due to heat is formed on an optically transparent base body 1 to obtain a recording medium. When both surfaces of a disk are used, the recording medium is stuck on the similar recording medium by an adhesive layer 4. With such a structure, the S/N and C/N are deteriorated, since a part of incident light is transmitted, and reflected from the rear surface of the stuck material. Accordingly, a colorant for absorbing light into the adhesive layer is mixed, or a light-absorptive adhesive is used. Moreover, a noises are further reduced by providing an optical interface separating layer 5 between the recording member and the adhesive layer. Besides, since abnormally is generated in the optical focus level by the lens effect due to an air layer 31, air permeability is provided to the adhesive layer. The recording and reproducing characteristics are thus improved. |
