Patent ID: 7572503
Filing Date: 2009-08-11
Classification: H05K,Y10S,Y10T

Abstract:
1. An insulating film comprising an insulating layer and a support, wherein the insulating layer is obtained by semi-curing an insulating resin composition on a surface of the support, the insulating resin composition comprising: (A) a novolak epoxy resin having a biphenyl structure; (B) carboxylic acid-modified acrylonitrile butadiene rubber particles; (C) a triazine ring-containing cresol novolak phenolic resin having a nitrogen content of 12 to 22% by weight; (D) a phenolic hydroxyl group-containing phosphorus compound; and (E) inorganic filler, wherein the amount of novolak epoxy resin is 55% to 75%, by weight, of the insulating resin composition based on the total weight of components (A) to (D), and wherein the amount of carboxylic acid-modified acrylonitrile butadiene rubber particles is 2% to 10%, by weight, of the insulating resin composition based on the total weight of components (A) to (D), and