Method and apparatus for manufacturing optical resin substrate, method and apparatus for manufacturing liquid crystal display element using it, and liquid crystal display device using it

A method for manufacturing an image display element having a resin substrate that holds a display functional portion on which images are displayed, characterized by comprising:

• an inorganic film forming step of forming inorganic films on both surfaces of the resin substrate, wherein the inorganic films having a film thickness between 15 nm and 40 nm both inclusive serve as a moisture barrier film, and
• a dehydration step of dehydrating the resin substrate before or after the inorganic film forming step, wherein
• the resin substrate is dehydrated in the dehydration step so that the water absorrnion is 0.5% or less by weight, the resin substrate subjected to the inorganic film forming step and the dehydration step and an other substrate are bonded to each other by a sealing material, and then the sealing material is cured by heating at least the resin substrate.