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Alternate metallization schemes for copper interconnect using selective CVD Co capping at the 22nm technology node are investigated. Control splits fabricated with PVD Ta(N) barrier/liner layers and CuMn alloy seedlayers are compared against interconnects fabricated using a PVD TaN barrier/CVD Co liner scheme with selective CVD Co capping. Secondary ion mass spectroscopy (SIMS) studies of PVD TaN...
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