Patent ID: 6715203
Filing Date: 2004-04-06
Classification: H01L,H05K,Y10T

Abstract:
A method for through-plating a substrate for power semiconductor modules, which method comprises:providing two metal plates, each having an outer surface; providing a ceramic plate with a through hole; seating the ceramic plate as a layer between the two metal plates, thereby forming a layer stack including a lower metal plate, the ceramic plate, and an upper metal plate; forming a through hole in the upper metal plate in alignment with the through hole in the ceramic plate, a diameter of the through hole in upper metal plate being smaller than a diameter of the through hole in the ceramic plate; reshaping an inner edge of the through hole of the upper metal plate by a punch punching into the through hole of the ceramic plate without reaching the lower metal plate; applying a paste solder to the outer surface of the upper metal plate in the region of the through hole in the upper metal plate; and carrying out a furnace heating step causing the paste solder to flow into the through holes and the two metal plates to be permanently contacted with one another only by the solder.