Patent ID: 7588698

Claim:
A circuit coupling adhesive comprising as essential ingredients: (1) an epoxy resin; (2) a latent curing agent; (3) inorganic fillers having an average particle diameter of less than 100 nm; and (4) needle shaped electro-conductive particles, wherein the needle-shaped electro-conductive particles are such that the ratio between the diameter and the length (aspect ratio) thereof is equal to or more than 5, the inorganic fillers are surface-treated with a silane coupling agent prior to combining the inorganic fillers with the epoxy resin, latent curing agent and needle shaped electro-conductive particles, the circuit coupling adhesive is in a shape of film, the electro-conductive particles are oriented in a film thickness direction, and the mixing amount of the inorganic fillers is 0.5 weight % or more and 30 weight % or less with respect to the total weight of the epoxy resin.