Patent ID: 7161203

Claim:
A gated field effect device comprising: a pair of source/drain regions having a channel region therebetween; a gate proximate the channel region between the source/drain regions, the gate comprising a gate width between the source/drain regions; and a gate dielectric received intermediate the channel region and the gate, the gate dielectric comprising a central region laterally centered along the width of the gate and a pair of straddling regions adjacent to and laterally straddling the central region, the central region being of a different material than either of the straddling regions effective to define the central region to have a different dielectric constant k than that of either of the straddling regions, the straddling regions being of different composition material and dielectric constant k relative to one another, the straddling regions being respectively individually characterized by a variable dielectric constant k thereacross in a direction along the width of the gate.