Femtosecond laser direct writing of metallic microstructures by photoreduction of silver nitrate in a polymer matrix.
Continuous silver microstructures were produced by three-dimensional (3-D) direct laser writing using a femtosecond-pulsed laser beam with polyvinylpyrrolidone (PVP) films containing silver ions. The lines drawn by scanning a tightly focused laser beam ranged from 200 nm to 1.7 microm. Using a sample solution of high density of silver nitrate, a continuous silver line with a resistivity of 3.48 x 10(-7) ohms m was produced. Not only 3-D microstructures such as pyramidal models but also hybrid microstructures comprising polymer and silver lines were demonstrated. The 3-D direct laser writing of metallic microstructures has potential for application to 3-D electrical wiring of electronic devices and MEMS devices.
Department of Mechanical Engineering, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan. maruo@ynu.ac.jp
Shoji
S
Maruo
Tatsuya
T
Saeki
D004559:Electric Wiring / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D011205:Povidone / Q000737:chemistry* / Q000528:radiation effects; D012835:Silver Nitrate / Q000737:chemistry* / Q000528:radiation effects
D012835:Silver Nitrate; D011205:Povidone