Patent ID: 6768170
Filing Date: 2004-07-27
Classification: H01L

Abstract:
A semiconductor device comprising:a die of a given size, said die including, a substrate of a first conductivity type; an epitaxial layer of said first conductivity formed over said substrate; a plurality of channel regions of a second conductivity formed in said epitaxial layer; a plurality of source regions formed, adjacent said channel regions each said source region being spaced from said epitaxial layer by an invertible channel region, each said source region being spaced from said epitaxial layer by an invertible channel region; a gate structure formed over each channel region; and a column of said second conductivity formed below each source region in said epitaxial layer, each said column having a charge concentration that is higher than needed for charge balance with said epitaxial layer adjacent thereto; wherein said charge concentration in said columns is selected in relation with said size of said die to increase the avalanche energy of said device.