Patent ID: 6809354
Filing Date: 2004-10-26
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate of a first conduction type; an epitaxial layer of the first conduction type disposed on the semiconductor substrate, at least a part of the epitaxial layer and a part of the semiconductor substrate being configured to function as a drain region; a plurality of variable-potential insulated electrodes, each of the electrodes filling in a corresponding trench formed in the epitaxial layer and comprising a semiconductor of a second conduction type, the trenches being substantially parallel to each other, and an insulating film being disposed between each of the electrodes and an inner wall of the corresponding trench; a plurality of source regions of the first conduction type formed in the epitaxial layer, at least one of the source regions being disposed between a corresponding couple of the trenches; a plurality of gate regions of the second conduction type formed in the epitaxial layer, each of the gate regions being disposed away from the corresponding source region and adjacent at least a portion of the corresponding insulating film, the gate regions being configured to be at a same potential as the variable-potential insulated electrodes; and a plurality of channel regions disposed in the epitaxial layer, at least one of the channel regions being disposed between a corresponding couple of the trenches and at least below the corresponding source region.