Patent ID: 9748408
Date: 2017-08-29
CPC Classifications: H01L

Claim:
1. A semiconductor drift device, comprising: a substrate of semiconductor material; a deep well of a first type of electrical conductivity provided for a drift region in the substrate; a drain region of the first type of electrical conductivity arranged at a surface of the substrate at a center of the deep well of the first type; a plurality of source regions of the first type of electrical conductivity arranged outside the deep well of the first type; a deep well or a plurality of deep wells of a second type of electrical conductivity opposite to the first type of electrical conductivity provided for a plurality of gate regions at the periphery of the deep well of the first type; the source regions being arranged in shallow wells of the first type of electrical conductivity at the periphery of the deep well of the first type; and the gate regions being formed by shallow wells of the second type of electrical conductivity, which are arranged in the deep well of the second type between the shallow wells of the first type.