Patent ID: 7733618
Filing Date: 2010-06-08
Classification: H01L

Abstract:
1. An electrostatic discharge device, comprising: an input/output pad; a power supply voltage line; a ground voltage line; a first protection element including a MOS transistor diode and an insulation layer that includes a gate electrode, the first protection element configured to provide a first path between the input/output pad and the power supply voltage line for discharging static electricity; a second protection element configured to provide a second path between the input/output pad and the ground voltage line for discharging the static electricity; a trigger circuit including a resistor connected in series to the gate electrode formed in the insulation layer in the first protection element, the trigger circuit configured to transmit a voltage in response to static electricity; and a power clamp element coupled with the trigger circuit element, the power clamp element configured to switch the power supply voltage line and the ground voltage line based on the voltage transmitted from the trigger circuit in response to the static electricity, thereby providing a third path for discharging the static electricity.