Patent ID: 9525043
Filing Date: 2016-12-20
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor device, comprising: forming a super-junction field effect transistor by: forming trenches in a semiconductor body from a first side, wherein a depth of the trenches ranges between 10 μm and 120 μm; forming charge compensation layers by doping parts of the semiconductor body via sidewalls of the trenches by introducing dopants by plasma doping; and thereafter forming an out-diffusion barrier layer on the sidewalls of the trenches; and thereafter widening a profile of the dopants introduced by plasma doping by diffusion caused by a thermal heating process, wherein the super-junction field effect transistor has a breakdown voltage of at least 100 V; and forming a drain contact at a second side opposite to the first side, and wherein doping the parts of the semiconductor body by plasma doping comprises introducing dopants into the parts of the semiconductor body via the sidewalls of the trenches at a dose in a range of 5×10 doping the parts of the semiconductor body by plasma doping comprises adjusting a DC-voltage pulse rise time smaller than 0.1 μs; and wherein a surface concentration of dopants introduced by plasma doping via a unit area of the sidewalls is at least ten times larger than a concentration of dopants in a mesa region of the semiconductor body between neighboring trenches which corresponds to N, wherein N is a net doping of the semiconductor body between the neighboring trenches.