| 摘要 |
PURPOSE:To obtain the titled high-density recording memory medium with high sensitivity by recording on a recording layer consisting of an org. substance contg. metallic atoms or ions forming a cluster with the light of specified wavelength, and reproducing with the light of the wavelength at the absorption maximum of the formed cluster. CONSTITUTION:Chloroauric acid, for example, is added to a methanol/water liq. mixture. The mixture is heated, and dried under vacuum to obtain polyvinyl alcohol contg. 0.1% gold. The alcohol is dissolved into methanol. The soln. is spin-coated on an acrylic sheet 1 on which an Al reflecting layer 2 is vapor- deposited, and the soln. is dried to obtain a memory medium 4 wherein a recording layer 3 is formed. A pigment laser beam 5 of 430nm wavelength is irradiated on the recording medium through a condenser lens 6 to form a cluster having about 100Angstrom size. Although the absorption maximum of Au at 560nm remains at the part which is not irradiated with the laser, the maximum at the irradiated part is lowered. The recording medium contg. >=2 kinds of metallic fine powder is thus formed by selecting the recording and reproducing wavelength, and a multiple chemical memory is also obtained. |
