Patent ID: 7615847
Filing Date: 2009-11-10
Classification: H01L

Abstract:
1. A method for producing a semiconductor component comprising: forming a first semiconductor region of a first conduction type; forming a second semiconductor region of the first conduction type, wherein the second semiconductor region has a lower dopant concentration than the first semiconductor region; forming a third semiconductor region of a second conduction type, which is complementary to the first conduction type, wherein the semiconductor regions are formed such that providing a substrate having the first semiconductor region; depositing a semiconductor layer of the first conduction type onto the first semiconductor region by means of epitaxy, wherein the semiconductor layer has an inhomogeneous dopant distribution with a minimum in the growth direction; and forming the third semiconductor region spaced apart from the first semiconductor region in the upper region of the semiconductor layer with formation of the second junction region, wherein during the deposition of the semiconductor layer the concentration of the supplied dopant is reduced only during a first time segment or during the entire deposition, and wherein afterward, by oxidation of uncovered surface regions of the semiconductor layer, dopant from the oxidized surface regions is segregated into non-oxidized regions in order to form the minimum.