Patent ID: 8586441
Filing Date: 2013-11-19
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure including a bipolar junction transistor (BJT), said method comprising: providing a substrate including a vertical stack of an insulator layer and a germanium layer having a doping of a first conductivity type; forming a silicon passivation layer on said germanium layer; forming an extrinsic base region on said silicon passivation layer; and forming regions having a doping of a second conductivity type that is the opposite of said first conductivity type in said germanium layer and in said silicon passivation layer by ion implantation of dopants of said second conductivity type, wherein a germanium emitter region and a germanium collector region are formed in said germanium layer, and a silicon emitter region and a silicon collector region are formed in said silicon passivation layer.