Transparent composite material and a method of manufacturing the same

The present invention has a number average particle size of 10 to 300 nm, a first step of organically treated synthetic smectite having an aspect ratio of 10 to 300 by quaternary organic ammonium salt and / or quaternary organic phosphonium salts, a second step of preparing the organically treated synthetic smectite and a curable resin mixed resin composition containing the synthetic smectite 10 to 40% by mass, a third obtaining a cured product by curing the resin composition step and a method for producing a transparent composite material and having a fourth step of removing the organic volatile components remaining in the cured product. According to this manufacturing method, less outgas at such high temperature and vacuum when the conductive thin film deposition, and transparent composite material of the flexible low thermal expansion coefficient is obtained.