Patent ID: 11121265

Abstract:
The present invention relates to a silicon carbide trench Schottky barrier diode using polysilicon and a method of manufacturing same. The diode has a low turn-on voltage and an improved reverse characteristic. The method includes sequentially forming an epitaxial layer, a polysilicon layer, an oxide film, and a photoresist film on a silicon carbide substrate, patterning the photoresist to form a photoresist pattern, etching the oxide film using the photoresist pattern as an etching mask to form an oxide film pattern, etching the polysilicon layer using the oxide film pattern as an etching mask to form a polysilicon pattern, removing the photoresist pattern, forming an epitaxial pattern by etching the epitaxial layer down to a predetermined depth using the oxide film pattern as an etching mask, and removing the oxide film pattern to produce a trench.