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Proceedings Paper

Laser micro/nanoprocessing for functional electronics
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Paper Abstract

Inkjet direct writing of functional materials provides a promising pathway towards realization of ultra-low-cost, largearea printed electronics, albeit at the expense of lowered resolution (~20-50 μm). We demonstrate that selective laser sintering and ablation of inkjet-printed metal nanoparticles enables low-temperature metal deposition as well as highresolution patterning. Combined with an air-stable carboxylate-functionalized polythiophene, all-inkjet-printed and laser-processed organic field effect transistors with micron to submicron critical feature resolution were fabricated in a fully maskless sequence, eliminating the need for any lithographic processes. All processing and characterization steps were carried out at plastic-compatible low temperatures and in air under ambient pressure. The fundamental mechanisms of the nanoparticle sintering process have been investigated by both Molecular Dynamics (MD) simulations as well as in-situ probing.

Paper Details

Date Published: 18 April 2009
PDF: 9 pages
Proc. SPIE 7131, XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 71311S (18 April 2009); doi: 10.1117/12.816408
Show Author Affiliations
Seung Hwan Ko, Univ. of California, Berkeley (United States)
Heng Pan, Univ. of California, Berkeley (United States)
Costas P. Grigoropoulos, Univ. of California, Berkeley (United States)


Published in SPIE Proceedings Vol. 7131:
XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

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