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A new direct low-k/Cu dual damascene (DD) contact line has been developed for low loss (low parasitic capacitance and low resistance) CMOS device platforms by on-current BEOL technologies. The excellent low contact resistance is realized in the low-k pre-metal-dielectrics (PMD) with a reduced aspect ratio, achieving 5.4 Omega for 75 nmphi contact which is only 1/4 relative to a conventional W-plug...
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