Photo-setting epoxy resin disc

Abstract

Abstract PURPOSE:To make it possible to manufacture optical disc board excellent in transparency, humidity resistance and heat resistance in a short time by a method wherein a photo-setting epoxy resin composition is poured between glasses or between a glass and a stamper and, after that, ultraviolet rays are irradiated from the glass side in order to set the photo-setting epoxy resin composition. CONSTITUTION:A photo-setting epoxy resin composition consisting of epoxy resin and at least one of tritolyl sulfonium hexafluoroantimonate and trixylyl sulfonium hexafluoroantimonate as photo-setting catalyst is poured between glasses or between a glass and a stamper. Ultraviolet rays having wave lengths of 184.9nm, 253.7nm and 365nm are irradiated from the glass side in order to set the photo-setting epoxy resin composition. Thus, a photo-setting epoxy resin disc, which sets in a short time and is excellent in transparency, heat resistance and humidity resistance and has little optical strain, can be provided.

Inventors

• 👤 Satoru Tsuchida
• 👤 悟 土田
• 👤 Haruki Yokono
• 👤 春樹 横野
• 👤 Takehiko Ishibashi
• 👤 石橋　武彦
• 👤 Tetsuro Saikawa
• 👤 哲朗 才川

Bibliographic Details