Patent ID: 7683399
Filing Date: 2010-03-23
Classification: H01L

Abstract:
1. A transistor comprising: a first nitride semiconductor layer which forms a channel region; a second nitride semiconductor layer which is formed on said first nitride semiconductor layer and has a band gap larger than a band gap of said first nitride semiconductor layer; a third nitride semiconductor layer which is formed on said second nitride semiconductor layer, has a p-type conductivity and includes a control region; a gate electrode which contacts said control region; a source electrode and a drain electrode which are formed beside said control region; and a hole absorbing electrode which is connected to said first nitride semiconductor layer, wherein said hole absorbing electrode is formed on an upper part of said second nitride semiconductor layer, and said first nitride semiconductor layer and said second nitride semiconductor layer include a p-type doped region below said hole absorbing electrode.