Patent ID: 9023464
Filing Date: 2015-05-05
Classification: C08K,C09J,H01L,H01R,H05K,Y10T

Abstract:
1. A connecting film which electrically connects a first circuit member with a second circuit member having a nitrogen atom-containing film on a surface thereof facing the first circuit member, the connecting film comprising: a first layer which is to be located at the first circuit member side; and a second layer which is to be located at the second circuit member side, wherein the first layer comprises a cationic curing agent, an epoxy resin and hydrophobic silica fine particles, and the second layer comprises a radical curing agent, an acrylic resin and an epoxy compound, wherein the epoxy compound has a molecular weight of 5,000 to 50,000, and an epoxy equivalent of 1,000 to 5,000, wherein only the first layer is a conductive particle-containing organic resin layer, and the second layer is an insulating organic resin layer containing no conductive particles, wherein the minimum melt viscosity of the conductive particle-containing organic resin layer is ten times or more greater than the minimum melt viscosity of the insulating organic resin layer at a rate of temperature rise of 10° C./min, wherein pH of the hydrophobic silica fine particles is 4.0 to 7.0 and a carbon content of the hydrophobic silica fine particles is 3.5-5.5 wt %, wherein an amount of the hydrophobic silica fine particles is 10 parts out of 100 parts of the composition of the first layer, wherein a BET surface area of the hydrophobic silica fine particles is 100±20 m wherein a particle diameter of the hydrophobic silica fine particles is about 12 nm, wherein an apparent specific gravity of the hydrophobic silica fine particles is about 50 g/l, and wherein the hydrophobic silica fine particles are treated with dimethyl silicon oil.