Patent ID: 8273619

Claim:
A method of implanting dopant into channel regions, comprising: providing a semiconductor substrate, the substrate having at least two channel regions defined therein, one of said at least two channel regions being a first channel region and another of the at least two channel regions being a second channel region; forming first and second source/drain regions in the substrate corresponding to the second channel region, the second channel region extending from the first source/drain region to the second source/drain region; implanting dopant into the first channel region and into a first portion of the second channel region to form threshold voltage implant regions within both the first and second channel regions; preventing the dopant from being implanted into a second portion of the second channel region, the first and second portions of the second channel region together comprising the entire second channel region; and diffusing the dopant from the first portion of the second channel region throughout the second portion of the second channel region.