Patent ID: 9054170
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first transistor that includes a first gate electrode, a first source electrode, a first drain electrode, and a first nitride semiconductor laminate that includes a first electron transit layer and a first electron supply layer; a second transistor that includes a second gate electrode, a second source electrode, a second drain electrode, and a second nitride semiconductor laminate that includes a second electrode transit layer and a second electron supply layer, the second drain electrode being a common electrode that also serves as the first source electrode, the second electron transit layer having part that underlies the second gate electrode and that contains a p-type dopant; and a p-type-dopant-diffusion-blocking layer, wherein the second nitride semiconductor laminate is disposed higher than the first nitride semiconductor laminate with the p-type-dopant-diffusion-blocking layer interposed between the first and second nitride semiconductor laminates, and the first gate electrode and the second source electrode are electrically coupled to each other to establish cascode connection of the first transistor to the second transistor.