[14a-PB4-1~15] 3.7 Laser processing

[14a-PB4-1] Femtosecond laser direct writing of Cu micropatterns using glyoxylic acid copper complex prepared from copper formate as the starting material

〇(B)Tomohide Hayashi¹, Akira Uetsuki², Tomoji Ohishi², Mizue Mizoshiri¹ (1.Nagaoka Univ. of Tech., 2.Shibaura Inst. of Tech.)

Keywords:femtosecond laser direct writing, glyoxylic acid copper complex, reduction

Glyoxylic acid copper (GACu) complexes, which were prepared using copper formate and copper sulfate as starting materials, were reduced to form Cu micropatterns using femtosecond laser pulse induced reduction. The prepared GACu complexes exhibited intense absorption below the wavelength of femtosecond laser pulses, 515 nm. In addition, Cu micropatterns were formed using the complex solutions. These results indicate that Cu was precipitated by thermochemical reduction induced by femtosecond laser pulse induced multiphoton absorption.