Liquid crystal electro-optical device and manufacturing method for the same

A method of manufacturing a liquid crystal electro-optical device comprising a pair of substrates provided with electrodes thereon respectively and a liquid crystal layer provided between said substrates, said method comprising the steps of:

• providing an ion absorbing film on at least one of said substrates, said ion absorbing film having a thickness up to 1000 .ANG.;
• forming a liquid crystal layer between said substrates so that said ion absorbing film directly contacts said liquid crystal layer;
• heating said device to promote ion absorption by said film;
• and
• applying a voltage across said liquid crystal layer during heating said device to further promote ion absorption by said film.

A method of manufacturing a liquid crystal electro-optical device comprising a pair of substrates provided with electrodes thereon respectively and a layer of liquid crystal provided between said substrates, said method comprising the steps of:

• forming a polyvinyl carbazole film on at least one of said substrates;
• introducing said liquid crystal between said substrates to form said layer;
• heating said substrates and said layer;
• and
• applying a D.C. voltage between said electrodes at the same time of said heating.

A method of manufacturing a liquid crystal device comprising a pair of substrates, a liquid crystal layer disposed between said substrates and electrode arrangements provided on said substrates for applying voltages to said liquid crystal layer, said method comprising the steps of:

• providing an ion absorbing film on at least one of said substrates having said electrode arrangements thereon;
• forming a liquid crystal layer between said substrates so that said ion absorbing film directly contacts said liquid crystal layer;
• heating said liquid crystal device to promote ion absorption by said film;
• and
• applying a voltage across said liquid crystal layer through said electrode arrangements during heating said device to further promote ion absorption by said film.