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Despite theoretical predictions of significant performance improvement in Flash memory devices using tunnel-barrier-engineered (TBE) structures, there have been very few reports that demonstrate experimental verification. In this work, we have studied the role of factors such as high- layer thickness and annealing recipe on the performance of gate stacks by electrical...
In this contribution, NMOS and PMOS band edge effective work function (EWF) and correspondingly low Vt are demonstrated using standard fab materials and processes in a gate-last scheme. For NMOS, the use of an Al cladding layer results in Vt = 0.08 V consistent with NMOS EWF = 4.15 eV. Migration of the Al cladding into the TiN and a relatively low oxygen concentration near the TiN/HfO2 interface are...
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