Abstract
A study of the negative and positive bias temperature instability (N/PBTI) reliability of FinFETs with different TiN metal gates deposited by either atomic layer deposition (ALD) or physical vapor deposition (PVD) on HfO2 dielectrics found that the nonuniformity of the interfacial oxide layer is closely related to reliability characteristics. FinFETs with an ALD TiN gate exhibit better NBTI and PBTI lifetimes than those with a PVD TiN gate. In addition, the dependence of fin width on NBTI reliability appeared to be worse with narrower fins, whereas PBTI reliability improves.
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