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Nano-Sized Silver Patterning Using Nano-Ink with an Indirect Patterning Method of Nanoimprint and Lift-Off Processes

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Abstract:

Silver nanopatterns were fabricated using a nanoimprint and lift-off process using silver nano-ink. Particle-based silver nano-ink was used to fabricate metal patterns below 100 nm in a lift-off process without the undercut shape of polymer patterns typically required in a conventional lift-off process using evaporated metal. The silver film made by spin-coating the silver nano-ink and removing the solvent using PDMS, has a low density compared to evaporated metal film; hence, unnecessary nano-ink that is not part of the pattern area is easily eliminated during the lift-off process. Using the proposed patterning process, patterns defined on a stamp were successfully transferred to the nano-ink through nanoimprinted polymer patterns on a four-inch Si wafer. Compared to other metal patterning methods that involve lift-off processes, the proposed metal patterning process is a simple and cost-effective process capable of fabricating the micro- and nano-sized metal patterns due to its low operating temperature and one-step polymer patterning process by nanoimprinting.

Keywords: CONDUCTIVE CIRCUIT; LIFT-OFF; NANOIMPRINT LITHOGRAPHY; PATTERNING; SILVER NANO-INK

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2256

Publication date: May 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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