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- W4210650863 abstract "In this work, we study multi-die to wafer bonding through plasma-activated Cu-Cu direct bonding carried out at room temperature in cleanroom ambient conditions. During the pre-bonding phase, surface analyses (e.g. surface profile, surface roughness, water contact angle and surface chemical states) are performed on both the as-deposited and the Ar/N <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> plasma-activated Cu surfaces. It is found that the Ar/N <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> plasma-activated Cu surface has lower water contact angle and surface roughness than the as-deposited Cu surface. From XPS, a thin passivation layer of CU <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>x</inf> N is produced on the Ar/N <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> plasma-activated Cu surface, which prevents the activated Cu from oxidation. The Ar/N <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> plasma-activated dies are bonded onto a wafer at room temperature in ambient conditions and annealed at 300°C for 1 hour, where successful bonding is achieved. This bonding scheme shows promising features for high-throughput advanced 3D packaging and heterogeneous integration." @default.
- W4210650863 created "2022-02-08" @default.
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- W4210650863 date "2021-10-01" @default.
- W4210650863 modified "2023-10-16" @default.
- W4210650863 title "Multi-Die to Wafer Bonding Through Plasma-Activated Cu-Cu Direct Bonding in Ambient Conditions" @default.
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- W4210650863 doi "https://doi.org/10.1109/3dic52383.2021.9687609" @default.
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