Patent ID: 6365925
Filing Date: 2002-04-02
Classification: H01L

Abstract:
A semiconductor device including a source electrode and a drain electrode between which a gate electrode is provided, comprising:a channel layer made of a semiconductor as a current path between the source electrode and the drain electrode and below the source electrode and the drain electrode; and a first barrier layer formed between the channel layer and the gate electrode and made of a semiconductor whose electron affinity is smaller than that of the semiconductor forming the channel layer, said barrier layer including a p-type low resistive region with a high concentration of p-type impurity provided in contact with the gate electrode and spaced apart from the channel layer, and a high resistivity region with a low concentration of impurity present, said low resistivity region being lower in resistance than said high resistivity region, said low resistivity region being higher in impurity concentration than said high resistivity region.