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Schottky-Barrier Height Tuning by Means of Ion Implantation Into Preformed Silicide Films Followed by Drive-In Anneal

An experimental study on Schottky-barrier height (SBH) tuning using ion implantation followed by drive-in anneal of As, B, In, and P in preformed NiSi and PtSi films is presented. Measured on B-implanted NiSi and PtSi Schottky diodes, the effective SBH on n-type Si is altered to ~1.0 eV. For As- and P-implanted diodes, the SBH on p-type Si can be tuned to around 0.9 eV. The process window for the most pronounced SBH modification is dopant dependent.