Patent ID: 6750512
Filing Date: 2004-06-15
Classification: H01L,Y10S

Abstract:
A MOS semiconductor device formed on a substrate of a first conductivity type, said device comprising:active zones for elementary active elements; and at least one inactive zone suitable for electric signal input and/or output, wherein at least one of the elementary active elements includes a body region of a second conductivity type that is connected with the source terminal of the device, and the at least one inactive zone includes: a semiconductor region of the second conductivity type formed in the substrate and adjacent a surface of the substrate, the semiconductor region being connected with the source terminal of the device; a conductive layer located over the semiconductor region; and a silicon oxide layer located between the semiconductor region and the conductive layer, the silicon oxide layer having a plurality of first zones and a plurality of second zones that alternate and are contiguous to each other, each of the first and second zones at least partially overlying the semiconductor region, with the first zones having a greater thickness than the second zones.