Patent ID: 6114735
Filing Date: 2000-09-05
Classification: H01L

Abstract:
A field effect transistor comprising:a semiconductive channel region; anda gate construction operatively proximate the channel region, the gate construction comprising a conductive gate region and a gate dielectric region intermediate the channel region and the conductive gate region, the gate dielectric region comprising a Ta.sub.2 O.sub.5 comprising layer and a SiO.sub.2 comprising layer intermediate the Ta.sub.2 O.sub.5 comprising layer and the channel region, the conductive gate region comprising at least two different material layers, one of the at least two layers comprising a first conductive material and another of the at least two layers comprising a conductive metal nitride which is received intermediate the Ta.sub.2 O.sub.5 comprising layer and the one layer, the conductive metal nitride comprising layer having laterally opposing dielectric nitride containing regions thereagainst which are thicker than the conductive metal nitride comprising layer.