Name : 23rd Symposium on Liquid Crystals
Number : 23
Location : [in Japanese]
Date : September 25, 1997 - September 27, 1997
Model LCD cell sealed with an epoxy resin were exposed to high temperature and high humidity test conditions. A remarkable voltage-holding-capacity (VHC) drops have been observed near the sealing edge of LCD cells by the exposure for a few hundred hours. The cause of VHC drops has been examined by microanalytical techniques like FT-IR-microspectroscopy and microsampling mass spectrometry. Carboxylic acid and amine have been detected from the interface between liquid crystal and polyimide alignment film near the sealing edge. The existence of these chemical species will be discussed from the viewpoint of VHC drops.
