Patent ID: 9595584
Date: 2017-03-14
CPC Classifications: G01R,H01L

Claim:
1. A semiconductor device comprising: a first conductive-type SiC layer having a first surface, a second surface and end faces surrounding the first surface and the second surface, the SiC layer having a semiconductor device structure; a second conductive-type voltage relaxing layer formed in the SiC layer such that the voltage relaxing layer is exposed to an end portion of the first surface of the SiC layer; an insulating layer covering the voltage relaxing layer; and a surface electrode connected to the first surface of the SiC layer through the insulating layer, the surface electrode having a pad area selectively exposed, wherein a distance X2 from an end of a portion of the surface electrode connected to the SiC layer to an end face of the SiC layer is longer than the width of a depletion layer spreading in the horizontal direction along the first surface of the SiC layer from a portion of the surface electrode connected to the SiC layer when a maximum applied voltage (BV) is applied to the semiconductor device structure.