Patent ID: 9343528
Filing Date: 2016-05-17
CPC Classification: H01L

Claim Text:
1. A process of forming an electronic device comprising: providing a substrate and a semiconductor layer overlying the substrate, wherein the semiconductor layer has a primary surface and an opposite surface, wherein the substrate is closer to the opposite surface than the primary surface; removing portions of the semiconductor layer to define a first trench, wherein the first trench lies within a termination region of the electronic device; forming a first insulating layer to fill the first trench to form a first insulating region within the termination region, wherein the first insulating region extends a depth into the semiconductor layer, wherein the depth is less than 50% of the thickness of the semiconductor layer; forming a vertical region in the termination region, the vertical region extending a depth greater than the first trench, wherein in a finished device, the first insulating region is disposed between the vertical region and an electronic component region; forming a doped region immediately adjacent to the first trench, wherein a peak doping concentration of the doped region is in a range of 0.5 to 1.5 orders of magnitude higher than the semiconductor layer; and forming a field electrode over the first insulating region.