Patent ID: 7466006
Filing Date: 2008-12-16
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate of a first conductivity type; first and second surface terminals laterally spaced-apart on a surface above the semiconductor substrate; a first semiconductor region of the first conductivity type overlying the substrate and ohmically coupled to the first terminal; a second semiconductor region of a second opposite conductivity type overlying the substrate ohmically coupled to the second terminal and laterally arranged with respect to the first semiconductor region; a parasitic vertical device comprising the first semiconductor region and the substrate; a channel region of the first conductivity type separating the first and second regions at the surface; a gate electrode overlying the channel region; an isolation region extending downward from the surface between an edge of the gate electrode and a third semiconductor region; and the third semiconductor region of the first conductivity type in proximity to the second semiconductor region and ohmically coupled to the second semiconductor region via the second terminal, thereby forming in combination with the second semiconductor region a shorted base-collector region of a lateral transistor extending between the first and second terminals.