Patent ID: 8890279

Claim:
A trench Schottky rectifier device comprising: a substrate having a first conductivity type; a first plurality of trenches and a second plurality of trenches formed in the substrate; an insulating layer formed on sidewalls of the first plurality of trenches and the second plurality of trenches and covered on a first portion of the substrate; an adhesion layer formed on a second portion of the substrate, the insulating layer, and bottoms of the first plurality of trenches and the second plurality of trenches; a first plurality of conductive structures formed in the first plurality of trenches and a second plurality of conductive structures formed in the second plurality of trenches; an electrode overlying the adhesion layer, the first plurality of conductive structures and the second plurality of conductive structures; and a plurality of doped regions having a second conductivity type formed in the substrate and located under the first plurality of trenches and the second plurality of trenches, and in contact with the adhesion layer at the bottoms of the first plurality of trenches and the second plurality of trenches; a guard ring having the second conductivity type in an edge area of the substrate.