Patent ID: 8969917
Filing Date: 2015-03-03
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a first layer including a first nitride semiconductor; a second layer provided on the first layer and including a second nitride semiconductor having a wider bandgap than a bandgap of the first nitride semiconductor; a source electrode and a drain electrode provided on the second layer; a gate electrode provided on the second layer and located between the source electrode and the drain electrode, the second layer including a first region between the gate electrode and the drain electrode, the first region being selectively provided in the second layer and containing fluorine distributed in a depth direction with a range of at least ranging from a surface of the second layer to a depth of 5 nanometers; and a passivation layer provided on the second layer between the source electrode and the gate electrode, and on the second layer between the gate electrode and the drain electrode except on the first region, wherein a concentration of fluorine contact resistance is highest at a surface of the first region and decreases in the depth direction, and wherein the fluorine is not contained in a portion underneath the gate electrode in the second layer.