9:15 AM - 9:30 AM
[23a-C301-2] Size effect of CuO nanoparticles on direct writing properties in femtosecond laser reductive sintering
Keywords:Cu patterning, Femtosecond laser direct writing, Reductive sintering
We investigated the size effect of the raw CuO nanoparticles on the femtosecond laser reductive sintering of Cu in air. Two CuO nanoparticle pastes, which exhibited particle average sizes of 18 nm and 14 nm, respectively, were prepared by mixing with polyvinylpyrrolidone and ethylene glycol. When the Cu patterns were fabricated on glass substrates, the line width increased with decreasing the size of the nanoparticles. These results indicate the nanoparticles were agglomerated by high surface energies. In addition, there is a possibility of the temperature reduction for sintering by increasing the small size of the nanoparticles.