Patent ID: 7274056

Claim:
A semiconductor construction comprising: a semiconductor substrate; a pair of conductively doped diffusion regions within a semiconductive material of the substrate, the conductively doped diffusion regions comprising a first type of dopant; and a transistor construction over the substrate, the transistor construction comprising: a gate disposed between the pair of diffusion regions and having a pair of opposing sidewalls; spacers disposed along the opposing sidewalls, the conductively doped diffusion regions extending under the spacers; a diffusion region lateral extension present on a first side of the transistor construction, the lateral extension being a halo-type implant of a second type of dopant that does not extend beneath the diffusion region; and an absence of any diffusion region extension on an opposing second side of the transistor construction, the lateral extension extending the diffusion region on the first side of the transistor construction laterally farther beneath the transistor construction relative to the diffusion region on the second side of the transistor construction.