M. Goorsky, K. Schjølberg-Henriksen, B. Beekley, N. Marathe, K. Mani, A. Bajwa, S. Iyer
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Low temperature metal-metal bonding for heterogeneous integration and performance scaling
Au-Au based interconnect bonding (and Cu-Cu bonding) is advanced by addressing the roles of initial surface roughness, chemical mechanical polishing, bonding pressure and temperature. Focused ion beam sectioning through the bonded interface is used to determine grain growth, void evolution, and void faceting.