Method of manufacturing laminated transparent substrate having birefringence.

摘要

A method of manufacturing a laminated transparent substrate comprising the steps of sandwiching between transparent glass substrates ionomer resin formed by bridging ethylenemetacryl acid copolymars with sodium ions, to form a laminated structure and sealing it in a reduced pressure atmosphere; applying heat and pressure to said laminated structure; rapidly decreasing the pressure applied to said laminated structure; and then rapidly decreasing the temperature of said laminated structure.