Patent ID: 6544428
Filing Date: 2003-04-08
Classification: H01L,H05K

Abstract:
A method for producing a multilayer circuit board using an anisotropic electro-conductive adhesive layer, comprising the following steps of:a) preparing a substrate carrying a first circuit pattern thereon; b) forming an anisotropic electro-conductive adhesive layer consisting of a thermosetting or thermoplastic resin adhesive containing electro-conductive particles dispersed therein on a surface of the substrate carrying the first circuit pattern; c) forming an electro-conductive layer on the anisotropic electro-conductive adhesive layer, which is then processed to a second circuit pattern; and d) heating and softening the anisotropic electro-conductive adhesive layer to enhance the curvature of an end of the second circuit pattern into the anisotropic electro-conductive adhesive layer to be closer to the substrate whereby the second circuit pattern is electrically connected to the first circuit pattern via the electro-conductive particles.