Patent ID: 7081675
Filing Date: 2006-07-25
Classification: C09K,H01L,H05K

Abstract:
1. An anisotropic conductive adhesive for a fine pitch which can be used to adhere an integrated circuit, on which a plurality of bumps each having a second height are formed, to a substrate, on which a plurality of electrodes each having a first height are formed keeping predetermined distances from each other, so that the integrated circuit is electrically connected to the electrodes, the anisotropic conductive adhesive comprising: a nonconductive first adhesive layer which includes a thermosetting resin and a hardener for hardening the thermosetting resin and has a first thickness of ½– 3/2 of the second height; and a second adhesive layer which includes a thermosetting resin, a hardener for hardening the thermosetting resin, and a plurality of conductive particles each having an average particle diameter of ½ or less of the width of gaps between the plurality of electrodes and a first density dispersion, has a second thickness larger than two times the average particle diameter of the conductive particles, and is formed on one surface of the nonconductive first adhesive layer.