Patent ID: 7348251

Claim:
A method of electrostatic discharge protection, comprising: providing trigger device comprising: a MOSFET having a source, a drain, a gate and a body in a substrate; a modulator under and in contact with said body; a body contact and a modulator contact, said body contact separated from said source, said drain and said modulator contact by dielectric isolation formed in said body; said modulator contact separated from said source and said drain by said dielectric isolation, said source and drain extending from a top surface of said body into said body a first distance, said body contact extending from said top surface of said body into said body a second distance, said dielectric isolation extending from said top surface of said body into said body a third distance, said third distance greater than said first or second distances; a first vertical bipolar transistor comprising said source, said body and said modulator; and a second vertical bipolar transistor comprising said drain, said body and said modulator; coupling said modulator contact to said substrate and to said source; coupling said drain to an I/O pad and to (i) a double gated diode pair and an input gate network or to (ii) a clamping network; and coupling said source to said substrate.