Patent ID: 8895378
Filing Date: 2014-11-25
Classification: H01L

Abstract:
1. A method of manufacturing a compound semiconductor device, the compound semiconductor device comprising: a substrate; an electron transit layer formed above the substrate; an electron supply layer formed above the electron transit layer; and a source electrode, a drain electrode, and a gate electrode formed between the source electrode and the drain electrode, which are formed above the electron supply layer, wherein a first insulating film is formed, at least, directly in contact with a first side surface of the drain electrode which faces the gate electrode and a second insulating film is formed, at least, directly in contact with a second side surface of the gate electrode which faces the drain electrode, and the first insulating film is not in contact with the second side surface, and wherein a two-dimensional electron gas concentration at a portion corresponding to below the second insulating film is made lower than a two-dimensional electron gas concentration at a portion corresponding to below the first insulating film between the electron transit layer and the electron supply layer.