Patent ID: 8956963
Filing Date: 2015-02-17
Classification: H01L

Abstract:
1. A method of fabricating a Schottky barrier diode, comprising: providing a semiconductor substrate having a first surface and a second surface positioned oppositely; forming a plurality of trenches on the first surface of the semiconductor substrate, and each of the trenches with a first depth having a sidewall and a first bottom surface; forming an insulating material on the first surface and on the sidewall and the first bottom surface of each of the trenches, wherein the insulating material has a first thickness on the sidewall of each of the trenches; patterning the insulating material on the first surface and the insulating material on the sidewall of each of the trenches so as to remove the insulating material on the first surface and to define a second bottom surface in each of the trenches, wherein the second bottom surface has a second depth smaller than the first depth, and an etched portion of the insulating material on the sidewall of each of the trenches has a second thickness smaller than the first thickness; and forming a contact metal layer at least on the first surface between the adjacent trenches.