Patent ID: 6147141
Filing Date: 2000-11-14
Classification: C08G,C09J,H01L,Y02P

Abstract:
A process for attaching a semiconductor device to a substrate comprising:(a) providing a substrate;(b) dispensing, on at least a portion of said substrate, a thermally reworkable die attach adhesive composition, said composition comprising(i) a thermally reworkable crosslinked fesin produced by reacting at least one dienophile having a functionality greater than one and at least one 2,5-dialkyl substituted furan-containing polymer, and(ii) at least one thermally and/or electrically conductive material present in an effective amount up to about 90% by weight of the die attach composition to provide a conducting medium, at a temperature which is sufficiently high to convert the die attach adhesive composition into a liquid thereby producing an adhesive-attached substrate;(c) attaching the semiconductor device on the surface of the thermally reworkable die attach adhesive on the adhesive-attached substrate while the adhesive is in a liquid, thereby bonding the semiconductor device to the substrate; and,(d) cooling the die attach adhesive to a temperature which is sufficiently low to solidify the resin thereby providing an assembly.