Patent ID: 11876093

Abstract:
A power device which is formed on a semiconductor substrate includes: plural lateral insulated gate bipolar transistors (LIGBTs) and a forward conductive unit. The plural LIGBTs are connected in parallel to each other. The forward conductive unit is connected in parallel to the plural LIGBTs. The forward conductive unit consists of a PN diode and a Schottky diode connected in parallel to each other. The PN diode and the Schottky diode share a same N-type region, a reverse terminal, an N-type extension region, an field oxide region, a gate, and a P-type well in an epitaxial layer. The N-type region and the P-type well form a PN junction, wherein the PN junction has a staggered comb-teeth interface from top view. A metal line extends on the staggered comb-teeth interface and alternatingly contacts the N-type region and the P-type well.