Patent ID: 6686106
Filing Date: 2004-02-03
Classification: C08G,C09D,G03F

Abstract:
An insulating film, obtained bycoating a photosensitive resin composition on a substrate; prebaking the resin composition to form a thin film; irradiating the resin composition patternwise with light; alkali developing the resin composition to remove the non-irradiated parts of the resin composition; and post-baking the resin composition to obtain a cured film, wherein the photosensitive resin composition comprisesa photosensitive imidosiloxane oligomer; an isocyanate having an unsaturated bond; a photopolymerization initiator; and an organic solvent; wherein the amount of the photosensitive imidosiloxane oligomer used is 100 parts by weight, the amount of the isocyanate is 1 to 80 parts by weight, and the amount of the photopolymerization initiator is 0.01 to 30 parts by weight, andwherein the photosensitive imidosiloxane oligomer comprises a reaction product of an epoxy compound having a photosensitive group and an imidosiloxane oligomer having a functional group reactive with an epoxy group, wherein the imidosiloxane oligomer having a functional group reactive with an epoxy group is obtained by reacting 70 to 90 mol % of total diamines with 100 mol % of tetracarboxylic dianhydride, wherein the total diamines consist of 10 to 50 mol % of an aromatic diamine having a functional group reactive with an epoxy group, 10 to 70 mol % of a diaminopolysiloxane, and 0 to 20 mol % of an aromatic diamine having plural benzene rings.