Patent ID: 9276160
Filing Date: 2016-03-01
CPC Classification: G02B,H01L

Claim Text:
1. A semiconductor device suitable for power applications, the semiconductor device comprising: a substrate; a thyristor epitaxial layer structure defining an anode region offset vertically from a cathode region with a plurality of intermediate regions therebetween and with a switchable current path extending vertically between the anode region and the cathode region through the plurality of intermediate regions, wherein the switchable current path has an conducting state where current flows through the current path between the anode region and the cathode region, and wherein the switchable current path has a non-conducting state where current does not flow through the current path between the anode region and the cathode region; an anode terminal electrode electrically coupled to the anode region; a cathode terminal electrode electrically coupled to the cathode region; an epitaxial resistive region that is electrically coupled to and extends laterally from a particular one of said plurality of intermediate regions; and a first field effect transistor having a channel for current flow therethrough, wherein the channel of the first field effect transistor is electrically coupled to and extends laterally from the epitaxial resistive region; wherein the thyristor epitaxial layer structure, the anode terminal electrode, the cathode terminal electrode and the first field effect transistor are integrally formed on the substrate; wherein the particular one intermediate region of the thyristor epitaxial structure is defined by a modulation doped quantum well structure, the modulation doped quantum well structure forming the channel of the first field effect transistor, and the modulation doped quantum well structure extending laterally away from the thyristor epitaxial layer structure to form the epitaxial resistive region that extends between the thyristor epitaxial layer structure and the first field effect transistor.