Patent ID: 6744610
Filing Date: 2004-06-01
Classification: H01L

Abstract:
An electrostatic discharge protection circuit, connecting a bonding pad and a pre-stage device, comprising:a P-type metal-oxide semiconductor (PMOS) transistor, comprising a first source/drain region, a second source/drain region and a gate electrode, wherein the first source/drain region of the PMOS transistor is connected to a system power source, and the gate electrode is connected to the pre-stage device, and the second source/drain region of the PMOS transistor is connected to the bonding pad; an N-type metal-oxide semiconductor (NMOS) transistor, comprising a first source/drain region, a second source/drain region and a gate electrode, wherein the first source/drain region of the NMOS transistor is connected to the second source/drain region of the PMOS transistor and the bonding pad, the second source/drain region of the NMOS transistor is grounded, and the gate electrode of the NMOS receives an output from the pre-stage device; and a capacitor, connecting to the source/drain region of the PMOS transistor, which is also connected to the system power source, and the gate electrode of the NMOS transistor.