A new handling technique of ultrafine particles, called ''ultrafine-pa
rticle beam deposition,'' was applied to the preparation of various fi
lms, such as of Ag, Au, Cu, Fe, Ni, Pt, Ta and W. The mechanism of dep
osition and coalescence of ultrafine particles is thought to be descri
bed by the diffusion process. The high surface activity of ultrafine p
articles was preserved in this handling technique, and the obtained fi
lms had low electric resistances close to those of corresponding bulk
metals.