Patent ID: 8536633
Filing Date: 2013-09-17
Classification: H01L

Abstract:
1. A metal-oxide-semiconductor field-effect (MOSFET) transistor, comprising: a P-type substrate; a gate oxide layer, located on the P-type substrate; a conductor layer, located on the gate oxide layer; a ground terminal connected to the conductor layer, and coupled to ground; a first N-type doping region, located in the P-type substrate and on one side of the gate oxide layer; a power terminal connected to the first N-type doping region, and coupled to a power supply; a second N-type doping region, located in the P-type substrate and on the other side of the gate oxide layer; a power-supply pad terminal connected to the second N-type doping region, and coupled to a power-supply pad; and an N-type well, located in the P-type substrate and between the first N-type doping region and the second N-type doping region, and covering one entire boundary of the first N-type doping region and of the second N-type doping region; a PN junction formed by the second N-type doping region and the P-type substrate for leading electrostatic-discharge current to the ground when the metal-oxide-semiconductor field-effect transistor is not operating, wherein the first and the second N-type doping regions forms a voltage-stabilizing capacitor between the power supply and the ground when the metal-oxide-semiconductor field-effect transistor is operating.