Patent ID: 8951879
Filing Date: 2015-02-10
Classification: H01L,Y02E

Abstract:
1. A method for producing a protective structure, the method comprising: providing a semiconductor base substrate with a doping of a first conductivity type; producing a first epitaxial layer on the semiconductor base substrate; implanting a dopant of a second conductivity type in a delimited implantation region of the first epitaxial layer; applying a second epitaxial layer with a doping of the second conductivity type on the first epitaxial layer; forming at least one insulation zone in the second epitaxial layer, such that the second epitaxial layer is subdivided into a first region and into a second region; producing a first dopant zone with a doping of the first conductivity type in the first region above the implantation region; producing a second dopant zone with a doping of the second conductivity type in the second region; and outdiffusing the dopant from the implantation region in order to form a buried layer at the junction between the first epitaxial layer and the first region of the second epitaxial layer.