Patent ID: 9450111
Filing Date: 2016-09-20
CPC Classification: H01L

Claim Text:
1. A Schottky barrier diode, comprising a substrate; a buffer layer, formed on the substrate; an upper layer, formed on the buffer layer; a first electrode layer, formed on the upper layer as an anode of the Schottky barrier diode; a second electrode layer, formed on the upper layer as a cathode of the Schottky barrier diode; a first n-type doping region, formed in the upper layer and under the first electrode layer, wherein an entire upper surface of the first n-type doping region is in contact with the first electrode layer; and a second n-type doping region formed in the upper layer and under the second electrode layer, and contacting the second electrode layer; wherein a lateral edge of the first n-type doping region and a lateral edge of the first electrode layer are separated by a first predetermined distance at a first direction at which the first electrode layer faces the second electrode layer; wherein a lateral edge of the second n-type doping region is extended from a lateral edge of the second electrode layer in a direction toward the first electrode layer by a second predetermined distance so as to leave a portion of an upper surface of the second n-type doping region uncovered by the second electrode layer, the direction of the extension is parallel to the first direction, and the second n-type doping region does not contact the first electrode layer; and wherein the upper layer comprises a barrier layer and a channel layer, the channel layer is formed on the buffer layer, the barrier layer is formed on the channel layer; wherein the barrier layer and the channel layer are metal nitride, and the metal of the metal nitride comprises Ga, In, Al, or a combination thereof; and wherein the first and the second n-type doping regions are formed entirely within the channel and barrier layers.