Patent ID: 7510903

Claim:
A method of manufacturing a transient voltage suppression device on a single, monolithic semiconductor die, the die having a first avalanche diode in series with a first rectifier diode connected cathode-to-cathode, electrically coupled in an anti-parallel configuration with a second avalanche diode in series with a second rectifier diode connected cathode-to-cathode, the die having a top surface, comprising the steps of: (a) applying an aluminum metalization layer to the entire top surface of the die; and (b) removing the aluminum metalization layer except for selected portions thereof to form a first aluminum region at one end of the die and a second aluminum region an opposite end of the die, such that the first aluminum region electrically couples the anode of the first avalanche diode to the anode of the second rectifier diode, and such that the second aluminum region electrically couples the anode of the first rectifier diode to the anode of the second avalanche diode, thereby forming a bi-directional transient voltage suppression device for providing protection against voltage spikes or surges, in two directions.