Patent ID: 9076676
Filing Date: 2015-07-07
Classification: H01L

Abstract:
1. A high-voltage transistor device, comprising: a semiconductor substrate with an upper surface; a doped well having a lower boundary in the semiconductor substrate, the upper surface and the lower boundary being spaced apart by distances; a body region being arranged in the well, the body region having a border comprising opposite first border sides at the upper surface and opposite second border sides at the upper surface; the body region having a first type of electric conductivity; the body region being adjacent to a portion of the well that has a second type of conductivity opposite the first type of conductivity; a source region being arranged in the body region at one of the second border sides; the source region having the second type of conductivity; a drain region arranged opposite the source region at the upper surface in the well at a distance from the body region; the drain region having the second type of conductivity; the distances between the upper surface and the lower boundary of the well being smaller at the first border sides of the body region than at the second border sides.