Patent ID: 11876093
Assignee: RICHTEK TECHNOLOGY CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A power device, which is formed on a semiconductor substrate; the power device comprising:
a plurality of lateral insulated gate bipolar transistors (LIGBTs) which are connected in parallel to each other; and
a forward conductive unit, which is connected in parallel to the plurality of LIGBTs, wherein the forward conductive unit consists of a PN diode and a Schottky diode which are connected in parallel to each other;
wherein the PN diode and the Schottky diode share a first N-type region, a reverse terminal, a first N-type extension region, a first field oxide region, a first gate and a first P-type well;
wherein the first N-type region, the reverse terminal, the first N-type extension region and the first P-type well are formed in an epitaxial layer on or above the semiconductor substrate;
wherein the first N-type region and the first P-type well form a PN junction therebetween, wherein the PN junction has a staggered comb-teeth interface from top view;
wherein a metal line extends right above on the staggered comb-teeth interface and alternatingly contacts the first N-type region and the first P-type well a plurality times.