Patent ID: 6023095
Filing Date: 2000-02-08
Classification: H01L

Abstract:
A semiconductor device having a substrate of a first conductivity type and which is provided with a signal input/output (I/O) pad connected to an internal circuit comprising:(a) an interlayer dielectric formed under said I/O pad;(b) a field oxide region formed under said interlayer dielectric;(c) a conductive shield region formed on top of said interlayer dielectric and electrically and physically separated from said I/O pad;(d) a semiconductor layer of a second conductivity type opposite said first conductivity type and disposed beneath said interlayer dielectric and substantially surrounding a periphery of said field oxide region formed under said I/O pad;(e) an electrically conductive material connecting said conductive shield region with said semiconductor layer through a plurality of vias in said interlayer dielectric; and(f) a well region of said second conductivity type extending beneath said field oxide region and said semiconductor layer.