Patent ID: 8994118
Filing Date: 2015-03-31
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate layer of a first conductivity type; a drift layer of a semiconductor material of the first conductivity type on the substrate layer; a first well region of a semiconductor material of a second conductivity type different than the first conductivity type in the drift layer in a central portion of the device; a second well region of a semiconductor material of the second conductivity type in the drift layer and spaced from the first well region in the central portion of the device; a first source region of a semiconductor material of the first conductivity in the first well region; a second source region of a semiconductor material of the first conductivity in the second well region; a first gate dielectric layer on the drift layer and in contact with the first source region and the second source region; a gate electrode on the first gate dielectric layer, the gate electrode comprising a lower surface on the first gate dielectric layer, an upper surface opposite the lower surface and sidewalls; an interlayer dielectric material on the upper surface and adjacent the sidewalls of the gate electrode; source ohmic contacts on the first and second source regions; a first getter material on the source ohmic contacts and on the interlayer dielectric material; a second getter material on the first getter material; a getter/barrier layer on the first getter material on the interlayer dielectric material over the gate electrode and on the second getter material over the source ohmic contacts; and a source metal on the getter/barrier layer.