64 nm pitch Cu dual-damascene interconnects using pitch split double exposure patterning schemeShyng-Tsong ChenHideyuki Tomizawaet al.2011IITC/MAM 2011
Robust and low cost copper contact application for low power device at 32 nm-node and beyondAtsunobu IsobayashiJames J. Kellyet al.2009IITC 2009