Patent ID: 6563146
Filing Date: 2003-05-13
Classification: H01L

Abstract:
A lateral heterojunction bipolar transistor, comprising:a substrate having an insulating layer; a first semiconductor layer in a mesa configuration disposed on the insulating layer; a second semiconductor layer formed by epitaxial growth on a side surface of the first semiconductor layer, the second semiconductor layer having a band gap different from a band gap of the first semiconductor layer; and a third semiconductor layer formed by epitaxial growth on a side surface of the second semiconductor layer, the third semiconductor layer having a band gap different from the band gap of the second semiconductor layer, at least a part of the second semiconductor layer functioning as an internal base layer of a second conductivity type, wherein a principal surface of the first semiconductor layer is a {110} plane and a side surface of the first semiconductor layer in contact with the second semiconductor layer is a {111} plane.