Patent ID: 6995426
Filing Date: 2006-02-07
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor layer of a first conductive type; a first diffusion area of the first conductive type formed in the semiconductor layer, the first diffusion area being defined by a first concentration profile of first impurities of the first conductive type and a second concentration profile of second impurities of a second conductive type; and a second diffusion area of the second conductive type formed in the semiconductor layer, the second diffusion area being defined by the first concentration profile and the second concentration profile, a junction between the first diffusion area and the second diffusion area being formed where a concentration of the first impurities and a concentration of the second impurities are same, the second concentration profile being formed by combining a plurality of concentration profiles of a plurality of impurity diffusion areas, the second diffusion area in the planar direction having a width less than half a maximum diffusion width of one of the plurality of impurity diffusion areas.