Mg<sup>2+</sup>-Induced Thermal Enediyne Cyclization at Ambient Temperature
作者:Diwan S. Rawat、Jeffrey M. Zaleski
DOI:10.1021/ja011215r
日期:2001.10.1
PHOTO-ALIGNMENT FILM AND LIQUID CRYSTAL DISPLAY ELEMENT
申请人:TAMURA NORIO
公开号:US20070232780A1
公开(公告)日:2007-10-04
[Object] To obtain an alignment film having excellent alignment stability of a liquid crystal and a high voltage holding ratio by application of linearly polarized light to a polyamic acid having a specific structure and then imidization under heat. [Solving Means] A photo-alignment film is obtained by: applying a polyamic acid solution on a substrate, where the polyamic acid contains, in its main chain, at least a group having unsaturated groups having 1 to 3 carbon-carbon double bonds or 1 to 4 triple bonds; vaporizing a solvent from a film formed; applying linearly polarized light to the film after the vaporization of the solvent; and then heating the film to imidize the polyamic acid.