Patent ID: 7291524
Filing Date: 2007-11-06
Classification: H01L

Abstract:
1. A method of manufacturing a device for regulating a flow of electrical current, comprising: providing a semiconductor substrate; introducing dopants into the semiconductor substrate, wherein the dopants in a channel region between source and drain electrodes are comprised of Arsenic, Phosphorous, or Antimony; providing a gate electrode on the semiconductor substrate; exposing the semiconductor substrate in an area proximal to the gate electrode; etching the semiconductor substrate on the exposed area using a partially isotropic etch; depositing a thin film of metal in the etched area of the semiconductor substrate; and reacting the metal with the substrate such that a Schottky or Schottky-like source electrode or drain electrode is formed; wherein the semiconductor substrate has a channel dopant concentration that varies significantly in a vertical direction and is generally constant in a lateral direction.