Patent ID: 8115231
Filing Date: 2012-02-14
Classification: H01L

Abstract:
1. A semiconductor device comprising: an insulating film formed over a semiconductor substrate; a Zener diode formed above the insulating film; an interlayer dielectric formed above the Zener diode; and a gate electrode and a source electrode formed above the interlayer dielectric, wherein the Zener diode is connected between the gate electrode and the source electrode, the Zener diode is formed by alternately joining an N type semiconductor region and a P type semiconductor region concentrically, the outermost P type semiconductor region having an outermost peripheral edge, the gate electrode includes a gate pad section, a planar shape of the Zener diode out to the outermost peripheral edge is substantially similar to a planar shape of the gate pad section, and the gate pad section extends for a predetermined distance beyond the outermost peripheral edge at all points of outermost peripheral edge of the outermost P type semiconductor region of the Zener diode to outside such that the gate pad section covers an upper part of all of the outermost P type semiconductor region.