Patent ID: 8084827

Claim:
A structure comprising a plurality of like-polarity field-effect transistors (“FETs”) provided along an upper surface of a semiconductor body having body material of a first conductivity type, each FET comprising: a channel zone of the body material; first and second source/drain (“S/D”) zones situated in the semiconductor body along its upper surface, laterally separated by the channel zone, and being of a second conductivity type opposite to the first conductivity type so as to form respective pn junctions with the body material; a gate dielectric layer overlying the channel zone; and a gate electrode overlying the gate dielectric layer above the channel zone, each S/D zone comprising a main S/D portion and a more lightly doped lateral S/D extension laterally continuous with the main S/D portion and extending laterally under the gate electrode such that the channel zone is terminated by the S/D extensions along the body's upper surface, wherein (a) the S/D extensions of the S/D zones of a first of the FETs are constituted or/and configured differently than the S/D extensions of the S/D zones of a second of the FETs and (b) the S/D extension of a specified one of the S/D zones of the first FET is more heavily doped than the S/D extension of a specified one of the S/D zones of the second FET.