High resolution selective multilayer laser processing by nanosecond laser ablation of metal nanoparticle films

Seung H. Ko, Heng Pan, David J. Hwang, Jaewon Chung, Sangil Ryu, Costas P. Grigoropoulos, Dimos Poulikakos

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Ablation of gold nanoparticle films on polymer was explored using a nanosecond pulsed laser, with the goal to achieve feature size reduction and functionality not amenable with inkjet printing. The ablation threshold fluence for the unsintered nanoparticle deposit was at least ten times lower than the reported threshold for the bulk film. This could be explained by the combined effects of melting temperature depression, lower conductive heat transfer loss, strong absorption of the incident laser beam, and the relatively weak bonding between nanoparticles. The ablation physics were verified by the nanoparticle sintering characterization, ablation threshold measurement, time resolved ablation plume shadowgraphs, analysis of ablation ejecta, and the measurement and calculation of optical properties. High resolution and clean feature fabrication with small energy and selective multilayer processing are demonstrated.

Original languageEnglish
Article number093102
JournalJournal of Applied Physics
Volume102
Issue number9
DOIs
Publication statusPublished - 2007 Nov 23

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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