Patent ID: 7227197
Filing Date: 2007-06-05
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate of a first conductivity type; a first region of a second conductivity type, the second conductivity type being opposite the first conductivity type; a voltage sustaining layer of the first conductivity type located between the substrate and the first region; a first homogenous embedded region of the second conductivity type located between the substrate and the first region and solely in contact with the voltage sustaining layer of the second conductivity type, the first embedded region being entirely embedded within the voltage sustaining layer and having an approximate geometric center on an imaginary plane spaced apart from the substrate and the first region by an approximate equal distance; and a second homogenous embedded region of the second conductivity type located between the substrate and the first region and solely in contact with the voltage sustaining layer of the second conductivity type, the second embedded region being entirely embedded within the voltage sustaining layer and having an approximate geometric center on the imaginary plane and spaced apart from the first embedded region.