title: Enhancement of pulsed laser ablation in environmentally friendly liquid.
abstract: Enhancement of pulsed laser ablation can be achieved in acetic acid as an environmentally friendly liquid. This paper evaluates microholes and textured features induced by a nanosecond pulsed laser under different processing circumstances. The microholes are fabricated by laser drilling in acetic acid and found to be 100% deeper than in air. The textured features achieved in the liquid demonstrate a higher content of Copper and a lower content of Oxygen. The improvement of laser ablation efficiency in the liquid is attributed to the strong confinement of plasma plume accompanying with shockwave and cavitation bubbles. Meanwhile, the laser enhanced chemical etching by the weak acid plays a critical role.
authors.forename: Fangfang
authors.initials: F
authors.lastname: Luo
authors.forename: Yingchun
authors.initials: Y
authors.lastname: Guan
authors.forename: Weili
authors.initials: W
authors.lastname: Ong
authors.forename: Zheren
authors.initials: Z
authors.lastname: Du
authors.forename: Ghimwei
authors.initials: G
authors.lastname: Ho
authors.forename: Fengping
authors.initials: F
authors.lastname: Li
authors.forename: Shufeng
authors.initials: S
authors.lastname: Sun
authors.forename: Gniancher
authors.initials: G
authors.lastname: Lim
authors.forename: Minghui
authors.initials: M
authors.lastname: Hong