This study describes bondability of Ag nanoparticles coated with organic shells in a pressureless bonding process. Three kinds of Ag nanoparticles (mean particle size: d = 20.2 nm, 58.5 nm, and 168 nm) were characterized by TEM observations and TG-DTA analysis. These Ag nanoparticles and mixed Ag nanoparticles comprised of them were subjected to bonding tests using Cu disk specimens. The bonding strength of the joints using the nanoparticles was examined by shear tests. The joints using mixed

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... nanoparticles showed higher shear strength than the joints using each Ag nanoparticles. The differences in the microstructure of the sintered layer formed by the Ag nanoparticles and mixed Ag nanoparticles were discussed.