Patent ID: 6584684
Filing Date: 2003-07-01
Classification: H01L,H05K,Y10T

Abstract:
A method for assembling a carrier and a semiconductor device, comprising:a) formulating a die-attach polymer to include therein a low density of ionized metallic particles; b) applying the die-attach polymer to a mating surface of at least one of the carrier and the semiconductor device; c) positioning pads of the carrier and corresponding semiconductor pads of the semiconductor device in substantially opposing relationship to each other, with the polymer therebetween to define an assembly; d) exposing the assembly to an electric field of sufficient strength to produce a controlled migration of the metallic particles to the pads of at least one of the semiconductor device and the carrier to form anisotropic metal dendrites extending from the pads, the dendrites establishing a conductive path and a metallurgical bond between the carrier and the semiconductor device; and e) causing the polymer to set so as to structurally reinforce and electrically insulate from each other the metal dendrites of adjacent pads, the metal dendrites defining metallurgical connections between the carrier and the semiconductor device.