Patent ID: 7880240
Filing Date: 2011-02-01
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate having a first conductivity; and a high voltage circuit section disposed on the semiconductor substrate, the high voltage circuit section comprising a well region having a second conductivity, a first heavily doped impurity region having the first conductivity and disposed on the well region, a second heavily doped impurity region having the second conductivity and disposed on the semiconductor substrate, a trench isolation region disposed between the first and second heavily doped impurity regions, an interconnect disposed over the trench isolation region, and first and second electrodes for preventing parasitic formation of an inverse layer on a surface of the semiconductor substrate due to a potential of the interconnect, the first and second electrodes being disposed above the trench isolation region, below the interconnect, and above a junction between the well region and the semiconductor substrate, the first electrode being disposed above the semiconductor substrate, and the second electrode being disposed above the well region.