Manufacture of information recording carrier

Abstract

Abstract PURPOSE:To suppress curvature and deformation even in atmosphere of high temperature and high humidity by adhering two disk substrates at least one of which has a groove for light guidance and an information recording surface together from both surfaces with an adhesive under pressure through a thickness specifying member over vacuum suction. CONSTITUTION:A disk substrate obtained by forming a photo-setting resin layer 9 wherein the light guidance groove is formed on a substrate 8 made of a hygroscopic high polymer, specially, such as polymethacrylate and vapor-depositing and optical recording layer 10 on the layer 9 and a resin base material 11 of the same quality and the same size with the base material 9 are applied with, for example, a photo-setting adhesive 16 and joined together one over another. In this case, pressure plates 12 and 13 are arranged and grooves 14 and 15 for vacuum suction are formed in the pressure plates 12 and 13; and the base materials while sucked to each other are irradiated with ultraviolet rays (shown by broken lines) from the side of the pressure plate 13 in the pressure state with thickness controlling members 17 and 18 between to set the adhesive 16. At this time, the plate 13 prevents the unevenness of setting due to the generation of interference fringes between the base material 11 and a glass plate 13 by using light-transmitted frosted glass. Further, surface undulations after the joining due to the difference of thermal expansion between the base materials 8 and 11 is prevented under the pressure until the completion of the setting.

Inventors

• 👤 Kunihiro Matsubara
• 👤 邦弘 松原
• 👤 Masami Uchida
• 👤 内田　正美

Bibliographic Details