Patent ID: 8829570
Filing Date: 2014-09-09
Classification: H01L

Abstract:
1. A heterojunction apparatus comprising: a substrate comprising an insulating material; a sub-collector region formed on the substrate; a collector region formed on the sub-collector region; a first base region and a second base region formed on the collector region; a first base contact region over the first base region, the first base contact region comprising a metal material coupled to a first input terminal; a collector contact region comprising a metal material formed on the sub-collector region, the collector contact region being coupled to the first input terminal; a second base contact region over the second base region, the second base contact region comprising a metal material, wherein the second base contact region is configured to be floating; an emitter region over the second base region; and an emitter contact region over the emitter region, the emitter contact region comprising the metal material coupled to a second input terminal.