Patent ID: 8436399
Filing Date: 2013-05-07
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; a nitride semiconductor layer formed above said substrate and having a laminated structure including at least three layers; a heterojunction bipolar transistor formed in a region of said nitride semiconductor layer; and a field-effect transistor formed in a region of said nitride semiconductor layer, the region being different from the region in which said heterojunction bipolar transistor is formed, wherein said nitride semiconductor layer includes: said semiconductor device further comprises: a collector electrode of said heterojunction bipolar transistor is electrically connected to said first nitride semiconductor layer in said first region, a base electrode of said heterojunction bipolar transistor is electrically connected to said second nitride semiconductor layer in said first region, an emitter electrode of said heterojunction bipolar transistor is electrically connected to said third nitride semiconductor layer in said first region, a source electrode and a drain electrode of said field-effect transistor are electrically connected to one of said first nitride semiconductor, said second nitride semiconductor layer, and said third nitride semiconductor layer in said second region, and a gate electrode of said field-effect transistor is formed on one of said first nitride semiconductor, said second nitride semiconductor layer, and said third nitride semiconductor layer in said second region.