Patent ID: 6373102
Filing Date: 2002-04-16
Classification: H01L

Abstract:
A transistor device with a specific compact non-uniform channel region formed by ion implantation on a semiconductor substrate, comprising:a gate formed on the surface of the semiconductor substrate; a channel region formed in the semiconductor substrate below the gate that includes at least a first group and a second group of ion implanted material each of which has a non-uniform, double-hump doping profile formed in a lateral direction across the channel region, wherein the double-hump doping profile of the first group extends through the channel region just below the gate such that the double-hump doping profile is positioned symmetrically about a center of a bottom portion of the gate, wherein the second group encloses the first group by extending deeper into the substrate, such that the double-hump doping profile of the second group substantially conforms in shape to the double-hump doping profile of the first group, and wherein a second doping concentration of the double-hump doping profile of the second group is lighter than a second doping concentration of the double-hump doping profile of the first group; and a source region and a drain region formed in the semiconductor substrate adjacent to the channel region.