Patent ID: 7358566
Filing Date: 2008-04-15
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a first semiconductor layer of the first conduction type; a first main electrode formed on one surface of said first semiconductor layer; a second semiconductor layer of the first conduction type and a third semiconductor layer of the second conduction type formed on the other surface of said first semiconductor layer, said third semiconductor layer arranged periodically along the surface in association with said second semiconductor layer; a fourth semiconductor layer of the second conduction type formed on the surfaces of said second semiconductor layer and said third semiconductor layer; a fifth semiconductor layer of the first conduction type formed on the surface of said fourth semiconductor layer; a control electrode formed in a trench with an insulator interposed therebetween, said trench passing through said fourth and fifth semiconductor layers and reaching said second semiconductor layer; a sixth semiconductor layer of the first conduction type diffused from the bottom of said trench; and a second main electrode connected to said fourth and fifth semiconductor layers.