G - Physics – 11 – B
Patent
G - Physics
11
B
352/57
G11B 7/00 (2006.01) G11B 7/0033 (2006.01) G11B 7/24 (2006.01) G11B 7/26 (2006.01)
Patent
CA 1316602
ABSTRACT OF THE DISCLOSURE There is disclosed a novel optical card comprising a recording medium part, which is composed of a recording layer for recording information and a substrate, having formed on the recording layer side of the recording medium part a protective plastic substrate and having the substrate of said recording medium part made of glass, wherein the substrate forming a portion of the recording medium part has little risk of deformation such as warping and less vulnerable to damage, hence a high reliability can be maintained for a long period. Also disclosed is the method of manufacturing the optical card of the present invention consisting in first forming the recording medium part, composed of the glass substrate and the recording layer for recording information, and integrating this recording medium part with a plastic substrate by insert molding or the like to complete the optical card high in reliability as mentioned above and well standardized or uniform in quality easily and efficiently. 14
590986
Hirokane Junji
Katayama Hiroyuki
Kimura Kazuhiro
Nakayama Junichiro
Ohta Kenji
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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