Patent ID: 8188601

Claim:
A semiconductor subassembly for use in a switching module of an inverter circuit for a high power, alternating current motor application, the semiconductor subassembly comprising: a wafer having first and second opposed metallized faces; a semiconductor switching device electrically coupled to the first metallized face of the wafer and having at least one electrode region; and an interconnect bonded to the semiconductor switching device, and including a first metal layer bonded to the at least one electrode region of the semiconductor switching device, a ceramic layer bonded to the first metal layer, the ceramic layer defining a via for accessing the first metal layer, a second metal layer bonded to the ceramic layer, and a conducting substance disposed in the via of the ceramic layer to electrically couple the first metal layer to the second metal layer, such that the second metal layer forms a contact pad for the at least one electrode region of the semiconductor switching device, wherein the conducting substance is substantially spherical.