Patent ID: 7790520
Filing Date: 2010-09-07
Classification: H01L

Abstract:
1. A process for manufacturing a semiconductor power device, comprising: providing a body made of semiconductor material having a first top surface; forming an active region with a first type of conductivity in the proximity of said first top surface and inside an active portion of said body; and forming an edge-termination structure, comprising a ring region having said first type of conductivity and a first doping level, set within a peripheral edge portion of said body and electrically connected to said active region, wherein said step of forming an edge-termination structure further comprises forming a guard region, having said first type of conductivity and a second doping level, higher than said first doping level, in the proximity of said first top surface and connecting said active region to said ring region; and in that it further comprises: forming a surface layer having said first type of conductivity on said first top surface, also at said peripheral edge portion, in contact with said guard region; and etching said surface layer in order to remove it above said edge portion in such a manner that the etch terminates inside said guard region.