US Patent 8003471 Formation of a super steep retrograde channel

Systems and methods for raised source/drain with super steep retrograde channel. In accordance with a first embodiment of the present invention, in one embodiment, a semiconductor device comprises a substrate comprising a surface and a gate oxide disposed above the surface comprising a gate oxide thickness. The semiconductor device further comprises a super steep retrograde channel region formed at a depth below the surface. The depth is about ten to thirty times the gate oxide thickness. Embodiments in accordance with one embodiment may provide a more desirable body biasing voltage to threshold voltage characteristic than is available under the conventional art.