Patent ID: 6709606
Filing Date: 2004-03-23
Classification: H01L,H01R,H05K

Abstract:
A production method of an anisotropic conductive film comprising an insulating film and plural conductive paths, to be interposed between a semiconductor element and a circuit board to establish an electrical connection between them, wherein the plural conductive paths are insulated from each other and penetrate the insulating film in the thickness direction of the film, with both ends of the paths being exposed on the surface of the insulating film, and wherein a conductive path capable of contact with an electrode of the semiconductor element has an end on the semiconductor element side protruding more than an end on the semiconductor element side of a conductive path incapable of contact with the electrode, which comprises at least the steps of(a) forming plural conductive rods in an insulating film in such a manner that the rods are insulated from each other and penetrate the film in the thickness direction thereof, and (b) extending a rod capable of contact with an electrode of the semiconductor element, or shortening a rod incapable of contact with the electrode, or extending a rod capable of contact with the electrode and shortening a rod incapable of contact with the electrode, so that the rod capable of contact has an end on the semiconductor element side protruding more than an end on the semiconductor element side of the rod incapable of contact.