Patent ID: 6991151
Filing Date: 2006-01-31
Classification: H01L,H05K,Y02P

Abstract:
1. A method of fabricating an electronic or optoelectronic module comprising an active component mounted on a base, a face of the component being provided with a plurality of contact pads designed to co-operate with corresponding contact zones disposed on a face of the base, at least one contact pad of the component having a first vertical contact pad structure designed to be bonded by means of a first bonding material to a corresponding contact zone of the base that has a first vertical contact zone structure, the method comprising: providing at least one other contact pad of the component with a second vertical contact pad structure and providing a corresponding contact zone of the base having a second vertical contact zone structure for bonding to said second vertical contact pad structure, the contact pad(s) and the contact zone(s) having said second vertical contact pad and contact zone structures respectively being coated in second bonding materials each having a melting temperature higher than the melting temperature of the first bonding material, said second materials being bonded together directly by thermal compression at an assembly temperature lying between the melting temperatures of the first and second bonding materials, the contact pad(s) and the contact zone(s) having the first vertical contact pad and contact zone structures respectively having dimensions such that, when they are bonded together by melting said first bonding material at said assembly temperature, a mutual force of attraction results between the component and the base for bonding together by thermal compression the contact pad and the contact zone respectively having the second vertical contact pad and contact zone structures; pressing the component against the base by placing said plurality of contact pads and said corresponding contact zones face to face; and heating the component and the base to said assembly temperature.