Patent ID: 9306029
Filing Date: 2016-04-05
CPC Classification: H01L

Claim Text:
1. A power electronic device integrated in a chip of semiconductor material of a first type of conductivity, comprising: an epitaxial region of a second type of conductivity extending into the chip from a front surface of the chip, a portion of the chip between a rear surface of the chip opposite the front surface and the epitaxial region defining a collector region, a gate region of conductive material in a trench extending into the epitaxial region from the front surface, an emitter region extending into the epitaxial region from the front surface at a first side of said trench, said emitter region comprising a body region of the first type of conductivity extending into the epitaxial region from the front surface, and a source region of the second type of conductivity extending into the body region from the front surface at said trench, and a dummy emitter region of the first type of conductivity extending into the epitaxial region from the front surface at a second side of said trench opposite said first side, said dummy emitter region lacking of said source region, wherein said gate region extends along a first wall of the trench facing the emitter region, and wherein a dummy gate region is formed in said trench, said dummy gate region being electrically isolated from said gate region and extending along a second wall of the trench opposite said first wall.