Patent ID: 9627551
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A semiconductor structure capable of ultrahigh-voltage (UHV) operation, comprising: a semiconductor substrate having a first electrical portion and a second electrical portion; the first electrical portion comprising: a first semiconductor well; a second semiconductor well positioned in the first semiconductor well; a third semiconductor well and a fourth semiconductor well positioned in the second semiconductor well; and a first electrode electrically connected to the third semiconductor well; the second electrical portion comprising: a fifth semiconductor well; a semiconductor layer positioned in the fifth semiconductor well, wherein the semiconductor layer has a first portion separated from a top surface of the semiconductor substrate by a portion of the fifth semiconductor well; a sixth semiconductor well and a seventh semiconductor well positioned in the fifth semiconductor well, wherein current along the geometrically shortest pathway between the sixth semiconductor well and the seventh semiconductor well is obstructed by the semiconductor layer; and a second electrode electrically connected to the seventh semiconductor well; and a bridged conductive layer directly connected between the fourth semiconductor well of the first electrical portion and the sixth semiconductor well of the second electrical portion.