Patent ID: 8003456
Filing Date: 2011-08-23
Classification: H01L

Abstract:
1. A method for producing a semiconductor component, comprising: providing a semiconductor body comprising a first surface; forming a mask on the first surface, wherein the mask comprises openings for defining respective positions of trenches; producing the trenches in the semiconductor body using the mask, wherein mesa structures remain between adjacent trenches; introducing a first dopant of a first conduction type using the mask into the bottoms of the trenches; carrying out a first thermal step, wherein the first dopant is at least partly outdiffused in order to form at least one buried buffer region; introducing a second dopant of a second conduction type, which is complementary to the first conduction type, at least into the bottoms of the trenches; and carrying out a second thermal step, wherein the mask is removed before the second dopant is introduced, such that when the second dopant is introduced, the second dopant is also introduced into the mesa structures, and wherein, by means of the second thermal step, the second dopant introduced into the mesa structures is at least partly outdiffused in order to form body regions in the mesa structures.