Investigation of BEOL Wet Cleaning on Etch Stop Layer in BEOL interconnects
W.K. Lo, Taiki Hinode, Pijeng Khor, M. Sankarapandian et autres
With BEOL scaling, the use of the etch stop layer has become critical. In this study we investigate the impact of wet cleaning processes on the etch stop layer, focusing on the yield of via chain structures in Cu interconnects. Three different …
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