Patent ID: 9281416
Filing Date: 2016-03-08
CPC Classification: H01L

Claim Text:
1. A Schottky diode comprising: a semiconductor substrate of a first conductivity type; a semiconductor layer of the first conductivity type and being lightly doped formed on the semiconductor substrate; first and second trenches formed in the semiconductor layer, the first and second trenches being lined with a thin dielectric layer, a bottom portion of each of the first and second trenches being filled with a trench conductor layer and a top portion of each of the first and second trenches being filled with a first dielectric layer; a plurality of well regions of a second conductivity type formed in a top portion of the semiconductor layer between the first trench and the second trench, the plurality of well regions being spaced apart in a longitudinal direction parallel to the longitudinal axis of the first and second trenches, the first dielectric layer filling each of the first and second trenches at least from a bottom surface of the well regions adjacent the trenches to a top surface of the semiconductor layer; and a Schottky metal layer formed on the top surface of the lightly doped semiconductor layer between the first trench and the second trench to form a Schottky junction, wherein the Schottky diode is formed with the Schottky metal layer as the anode and the lightly doped semiconductor layer between the first and second trenches as the cathode.