Patent ID: 6031254
Filing Date: 2000-02-29
Classification: H01L

Abstract:
A monolithic assembly of a vertical IGBT transistor and a vertical fast diode connected to a drain of the IGBT transistor, implemented in an N-type semiconductor substrate, wherein a rear surface of the assembly is uniformly formed of a P-type layer having a plurality of openings through which the N-type substrate appears, and wherein the rear surface is covered with a material for establishing a Schottky contact with the substrate and an ohmic contact with the P-type layer and wherein the rear surface extends not only in front of cells of a vertical MOS transistor that is formed in a front surface of the assembly and which constitutes a portion of the vertical IGBT transistor, but also in front of an N.sup.+ type region formed on the front surface and constituting a cathode of the diode.