Patent ID: 9082628
Filing Date: 2015-07-14
Classification: H01L

Abstract:
1. A trench Schottky diode, comprising: a highly doped substrate of a first conductivity type; an epitaxial layer of the first conductivity type and applied to the substrate, wherein: a first metal layer disposed at a rear side and serving as a cathode electrode; a second metal layer disposed at a front side and extending into the trenches, the second metal layer serving as a control electrode and forming a first Schottky contact with the second partial layer; and a third metal layer disposed between the second metal layer and each of the bottoms of the trenches, the third metal layer forming a second Schottky contact with the second partial layer and a third Schottky contact with the first partial layer wherein a barrier height of the second Schottky contact is different from a barrier height of the third Schottky contact.