Patent ID: 6127727
Filing Date: 2000-10-03
Classification: H01L

Abstract:
A composite conductor for use as soldered connector to a semiconductor device made of a semiconductor material having a given thermal expansion coefficient, said composite conductor comprising:a metal foil having a portion with opposed major surfaces, with one of said opposed surfaces of said portion having adaptations for soldering to one or more contact areas of a semiconductor device made of a semiconductor material having a given thermal expansion coefficient;a layer of ceramic on the other of said opposed surfaces, said foil and layer of ceramic having a composite thermal expansion coefficient in said portion close to said given thermal expansion coefficient; andsaid adaptations in said one surface of said foil including first areas of said metal foil not wettable by molten solder, whereby other areas of said metal foil that can coact with surface tension of molten solder between said metal foil one surface and contact areas on said device chip, and thereby provide automatic alignment configurations on said one surface of said metal foil.