Patent ID: 7768092
Filing Date: 2010-08-03
Classification: H01L

Abstract:
1. A semiconductor device comprising a first layer ( 1 ) of a semiconductor material having an energy gap between the conduction band and the valence band exceeding 2.2 eV and being doped according to a first conductivity type, n or p, and a second layer ( 3 ) on top thereof designed to form a junction ( 15 ) blocking current in a reverse biased state of the device at an interface to said first layer, said device further comprising extension means for extending a termination of said junction and by that distributing the electric field within said first layer laterally with respect to a lateral border ( 6 ) of said second layer ( 3 ), wherein said extension means comprises a plurality of annular, concentric rings in juxtaposition laterally surrounding said junction and being arranged, in a lateral direction away from said junction, alternately a ring (