Patent ID: 7892974
Filing Date: 2011-02-22
Classification: H01L

Abstract:
1. A method of fabricating a silicon carbide based transistor that eliminates the need for electrical connection by wire bonding in an integrated circuit, the method comprising: providing at least one semiconductor layer of a first material on a substrate of a second material, the substrate having first and second surfaces on opposite sides of the substrate, and the semiconductor layer comprising a lower surface in contact with the second surface of the substrate and an uppermost surface for fabricating semiconductor device components thereon; masking the first surface of the substrate with a photoresist to define predetermined locations for a plurality of conductive vias; and etching the plurality of conductive vias through the substrate and through the semiconductor layer to provide conductive paths from the first surface of the substrate to the uppermost surface of the semiconductor layer by etching the substrate with an etchant that removes the second material but does not remove the first material so that the etching removal of the second material stops at the semiconductor layer and by thereafter etching the semiconductor layer with an etchant that removes the first material of the semiconductor layer but does not remove the second material.