LOW RESISTANCE GATE FOR POWER MOSFET APPLICATIONS AND METHOD OF MANUFACTURE

摘要

A trench gate field effect transistor is formed as follows. A trench is formed in a semiconductor region, followed by a dielectric layer lining sidewalls and bottom of the trench and extending over mesa regions adjacent the trench. A conductive seed layer is formed in a bottom portion of the trench over the dielectric layer. A low resistance material is grown over the conductive seed layer, wherein the low resistance material is selective to the conductive seed layer.