Patent ID: 8415752

Claim:
A structure comprising a field-effect transistor provided along an upper surface of a semiconductor body having body material doped with semiconductor dopant of a first conductivity type so as to be of the first conductivity type, the transistor 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 pocket portion of the body material more heavily doped than laterally adjacent material of the body material extending along largely only the first of the S/D zones and into the channel zone substantially up to the body's upper surface so as to cause the channel zone to be asymmetric with respect to the S/D zones, the dopant of the first conductivity type having a concentration which reaches a plurality of local maxima at respective locations (i) spaced apart from one another in the body material along an imaginary line extending through the body material generally perpendicular to the body's upper surface, (ii) extending generally laterally across the pocket portion, and (iii) substantially spaced apart from the second S/D zone so as to cause the pocket portion to have a net dopant concentration which reaches a like plurality of respectively corresponding local maxima at respective locations spaced apart from one another in the pocket portion; a gate dielectric layer overlying the channel zone; and a gate electrode overlying the gate dielectric layer above the channel zone.