Patent ID: 9093287
Filing Date: 2015-07-28
Classification: H01L

Abstract:
1. A diode, the diode comprising: an N-type well region disposed in an N-type epitaxial layer; a P-type drift region disposed in the N-type epitaxial layer, wherein the P-type drift region is spaced apart from the N-type well region; a cathode electrode including a first electrode and an N-type doping region, wherein the N-type doping region is electrically coupled to the first electrode, the N-type well region includes the N-type doping region only and does not include a P-type doping region, and the first electrode is disposed on the N-type epitaxial layer; an anode electrode including a P-type doping region, wherein the P-type doping region is disposed in the P-type drift region; and an isolation structure disposed in the P-type drift region, wherein the isolation structure is disposed between the N-type well region and the P-type doping region, wherein the first electrode of the cathode overlaps part of the isolation structure, wherein the first electrode corresponds to a gate of a P-type LDMOS transistor, wherein the N-type well region, the P-type drift region, the P-type doping region, and the isolation structure of the diode corresponds to an N-type well region, a P-type drift region, a drain region, and an isolation structure of a P-type LDMOS transistor, respectively.