Silicides for 22nm and Beyond

Abstract

Silicide engineering for high-performance CMOS logic devices is challenged by aggressive scaling of critical dimensions, new high-performance elements, and requirements of morphological stability. While NiSi can satisfy many of the integration challenges, incorporating Pt forms a more robust [NixPt(1-x)]Si and improves morphological stability. In light of the challenges created by performance enablers, we review our latest results indicating whether a replacement for NiPt(1-x)Si is needed and highlight our investigations into alternative silicide materials such as Er, Yb, and Ir. We also discuss the architecture and performance needs beyond 32nm technology.