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A high performance 45nm BEOL technology with proven reliability is presented. This BEOL has a hierarchical architecture with up to 10 wiring levels with 5 in PECVD SiCOH (k=3.0), and 3 in a newly-developed advanced PECVD ultralow-k (ULK) porous SiCOH (k=2.4). Led by extensive circuit performance estimates, the detrimental impact of scaling on BEOL parasitics was overcome by strategic introduction...
Despite many projections on the inevitable post-PVD evolution of interconnect technology, it remains PVD-based for liner-seed through 45 nm and perhaps farther, with an ALD process change the obvious next step perhaps followed by a switch from Ta to Ru. Cu size effects are not critical to low-level (1times) line RC and the biggest performance opportunity is with the high level fat lines. CA technology,...
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