Patent ID: 6359790
Filing Date: 2002-03-19
Classification: H01L

Abstract:
A multichip module, comprising:a silicon carrier substrate having a mounting side and an underside; multilayer wiring applied to said mounting side of said carrier substrate, said multilayer wiring including a first, uppermost conductor track plane and a lowermost conductor track plane; at least one semiconductor chip in contact with said first, uppermost conductor track plane and flip-chip mounted thereon via a plurality of small solder balls; and said underside of said carrier substrate having formed therein a plurality of cavities narrowing in a funnel shape from said underside and to said lowermost conductor track plane; and a plurality of soldering contacts each in the form of a solder agglomeration disposed in a respective one of said cavities and extending from said underside to said lowermost conductor track plane, for electrically connecting the multichip module to a mounting rack.