레이저에 의한 포토레지스트의 마스크리스 페터닝

Maskless patterning of Photoresist by laser

By irradiating photoresist on Si or glass with $Ar^+$ (${\lambda}$=514 nm, CW) and Nd:YAG (${\lambda}$=266 and 532nm, pulse) laser beam, the photoresist was etched masklessly in air. Using a fourth harmonic Nd:YAG laser beam, the etching threshold of energy fluence was $25\;J/cm^2$ and the damage of substrate was appeared over $40\;J/cm^2$.