[10a-N321-1~11] 3.7 Laser processing

[10a-N321-8] Dynamic observation of Cu precipitation from glyoxylic acid Cu complex irradiated by femtosecond laser pulses

〇(B)Genki Omori¹, Tomoji Ohishi², Mizue Mizoshiri¹ (1.Nagaoka Univ. of Tech., 2.Shibaura Inst. of Tech.)

Keywords:femtosecond laser direct writing, glyoxylic acid Cu complex, dynamic observation

We investigated the effect of the substrates with various thermal conductivity on Cu precipitation area by dynamic observation of the precipitation to control the amount of Cu precipitation in femtosecond laser pulse-induced photo-thermochemical reduction of glyoxylic acid Cu complex. The Cu precipitation area on SiO₂ glass substrate with low thermal conductivity was larger than that on Si or Al₂O₃ substrates with high thermal conductivity. These results suggest that the thermal conductivity of the substrate was dominated in the Cu precipitation.