Patent ID: 7498614
Filing Date: 2009-03-03
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 substantially uniform embedded region of the second conductivity type located between the substrate and the first region and exclusively in contact with the voltage sustaining layer, the first embedded region being embedded entirely within the voltage sustaining layer and having at least a portion crossing an imaginary plane spaced apart from the substrate and the first region by an approximate equal distance; and a second substantially uniform embedded region of the second conductivity type located between the substrate and the first region and exclusively in contact with the voltage sustaining layer, the second embedded region being embedded entirely within the voltage sustaining layer and having at least a portion crossing the imaginary plane and spaced apart from the first embedded region.