Modeling of picosecond laser-induced plasma amplification inside a microhole and an implied novel technology to drill microholes with varying diameters with depth. (January 2016)

• Record Type: Journal Article
• Authors: Dabir-Moghaddam, Navid; Tao, Sha; Wu, Benxin; Shin, Yung C.
• Is Part Of: Manufacturing letters. Volume 7(2016:Jan.)
• Page Start: 1
• Page End: 5
• Publication Date: 2016-01
• Subjects: Laser drilling -- Laser micromachining; Manufacturing industries -- Periodicals; Production engineering -- Periodicals; Manufacturing industries; Periodicals; 670
• DOI: 10.1016/j.mfglet.2015.11.004
• Languages: English
• ISSNs: 2213-8463

Abstract

Abstract: Microholes with varying diameters at different depths are very desirable in various important applications. However, it is very challenging to produce microholes with varying diameters when the variation is in a complicated way and/or when the hole diameter is very small. This paper presents physics-based modeling work on the interactions among a picosecond (ps) laser pulse, a pre-existing plasma plume inside a microhole, and the hole sidewall. The modeling work implies the potential feasibility of a novel dual-pulse laser ablation and plasma amplification (LAPA) process for drilling microholes with varying diameters at different depths.