| abstract |
(57) [Summary] [Structure] A polyimide precursor varnish composed of a high molecular weight polyamic acid, an amine compound, an organic solvent and water. And an electronic device using polyimide obtained by imidizing it as an insulating layer, a protective film, an alignment film, and the like. [Effect] Since the functional group of the polyamic acid is protected in the polyimide precursor varnish, the viscosity stability of the varnish is excellent even though the solvent is water. |