Patent ID: 6236086
Filing Date: 2001-05-22
Classification: H01L

Abstract:
An electrostatic discharge ESD protection circuit for protected terminals on a semiconductor body, the protected terminals adapted for connection to external signal sources, comprising:a source and a drain in the semiconductor body, the source and the drain comprising respective n+ regions;a channel between the source and the drain;an insulator over the channel and over at least one of the source and the drain, the insulator including a thinner portion over the channel, and a thicker portion over said at least one of the source and the drain which is thicker than the thinner portion;a gate structure over the insulator and the channel and including a gate extension substantially overlapping the thicker portion of the insulator over said at least one of the n+ regions of the respective source and drain; andelectrical contacts on n+ regions of the respective source and drain, one of the contacts connected to one of the protected terminals.