Abstract
CVD Mn-based self-formed barrier (SFB) has been evaluated and integrated for reliability and RC delay assessment. Intrinsic TDDB lifetimes were extracted from planar capacitor measurement. A comparable lifetime as the TaN/Ta reference was obtained on SiO2 and porous low-k with a thin oxide liner. Good reliability performance was demonstrated after integration. Compared to conventional barrier, significant RC reduction (up to 45% at 40nm half pitch) and lower via resistance which become more beneficial upon scaling present CVD Mn-based SFB as an attractive candidate for future interconnect technology.
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