| 摘要 |
PURPOSE:To obtain the optical card which has a high recording sensitivity and is stable and reliable even when subjected to a high temp. and high humidity by providing two parts; a region where a recording film contg. a noble metal element and chalcogen element and a synthetic resin layer having a low dynamic shear modulus are laminated and a region where an adhesive agent layer of a low equal. water absorptivity is formed. CONSTITUTION:The region formed with the recording film layer 3 which contains the noble metal element and chalcogen element and in which information is recorded by shape changes and the synthetic resin layer 4 which has <=1X10<8>dyn/cm<2> dynamic shear modulus at 25 deg.C formed on this recording film layer 3 is provided to the 1st substrate 1. The region formed with the adhesive agent layer 5 having <=3% equil. water absorptivity is provided thereto as well. The 1st substrate 1 and the 2nd substrate 2 are adhered by the adhesive agent layer 5. The synthetic resin layer 4 is provided to protect the recording film layer 3 and the material thereof is exemplified by a polyurethane region, polyester resin, silicone resin, etc. The optical card which is free from a change in the recording and reproducing characteristics, etc., even when subjected to the high temp. and high humidity and has the high reliability is obtd. in this way. |
