Patent ID: 7359170

Claim:
A padring formed on a semi conductive substrate die to provide Electro Static Discharge (ESD) protection for a Radio Frequency (RF) circuit also formed on the semi conductive substrate die, the padring comprising: a voltage supply rail disposed on an outer perimeter of the semi conductive substrate die and bordering around the RF circuit; a ground rail disposed on an inner perimeter of the semi conductive substrate die and also bordering around the RF circuit, the ground rail residing substantially parallel to the voltage supply rail; a plurality of signal pad structures disposed between the voltage supply rail and the ground rail, each signal pad structure comprising: a signal pad disposed between the voltage supply rail and the ground rail, in which the signal pad couples to the RF circuit; a voltage supply path diode disposed between and coupled to the signal pad and the voltage supply rail; and a ground path diode disposed between and coupled to the signal pad and the ground rail; and a plurality of voltage clamps disposed between and coupled to the voltage supply rail and the ground rail and disposed adjacent to respective signal pad structure on the semi conductive substrate die, wherein the voltage clamps, voltage supply rail, ground rail and the signal pad structures are formed at a periphery of the semi conductive substrate die and on a border of the RF circuit.