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Proceedings Paper

Patterning microconductor using nanosecond laser ablation of metal nanoparticle film
Author(s): Sewoon Han; Taewong Lim; Jaewon Chung; Seung H. Ko; Costas P. Grigoropoulos; Dongjo Kim; Jooho Moon
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Paper Abstract

Ablation of metal nanoparticle film using frequency doubled Nd:YAG nanosecond laser is explored to apply for trimming drop on demand (DOD) inkjet printed electrical micro-conductor for flexible electronics. While elevated rim structure due to expulsion of molten pool is observed in sintered nanoparticle film, the ablation of unsintered nanoparticle film results in a Gaussian-shaped ablation profile, so that a clean precise patterning is possible. In addition, the ablation fluence threshold of unsintered metal nanoparticle film is at least ten times lower than that of a corresponding metal film. Therefore, by using nanosecond laser ablation, inkjet printed metal nanoparticles compatible for flexible polymer can be patterned efficiently with a high resolution.

Paper Details

Date Published: 13 March 2007
PDF: 10 pages
Proc. SPIE 6458, Photon Processing in Microelectronics and Photonics VI, 645811 (13 March 2007); doi: 10.1117/12.701533
Show Author Affiliations
Sewoon Han, Korea Univ. (South Korea)
Taewong Lim, Korea Univ. (South Korea)
Jaewon Chung, Korea Univ. (South Korea)
Seung H. Ko, Univ. of California, Berkeley (United States)
Costas P. Grigoropoulos, Univ. of California, Berkeley (United States)
Dongjo Kim, Yonsei Univ. (South Korea)
Jooho Moon, Yonsei Univ. (South Korea)

Published in SPIE Proceedings Vol. 6458:
Photon Processing in Microelectronics and Photonics VI
David B. Geohegan; Craig B. Arnold; Tatsuo Okada; Frank Träger; Jan J. Dubowski; Michel Meunier; Andrew S. Holmes, Editor(s)

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