ADHESIVE HAVING ANISOTROPIC ELECTRICAL CONDUCTIVITY AND ADHESIVE SHEET HAVING ANISOTROPIC ELECTRICAL CONDUCTIVITY

摘要

PURPOSE:To provide a specific adhesive having anisotropic conductivity, capable of electrically connecting two substrates each having an electric connection part by the hot-pressing through the adhesive and satisfying high electrical conductivity in the pressing direction and high insulation in the non-pressed direction at the same time over a long period at time even under high temperature and humidity condition. CONSTITUTION:This adhesive having anisotropic electrical conductivity is produced by dispersing electrically conductive particles in an insulating adhesive component composed of an acrylic adhesive, an epoxy resin precursor and capsules containing an imidazole-type curing agent (preferably 2-methylimidazole, 2-ethyl-4-methylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole or 2- phenylimidazole) and having a surface layer of a resin incompatible with the imidazole compound. At least two substrates each having an electrical connection part on the surface are placed in a state to face the electrical connection parts to each other interposing the above adhesive between the connection parts and the substrates are hot-pressed to achieve the electrical connection of the electrical connection parts of the substrates in the pressing direction.