Journal
THIN SOLID FILMS
Volume 515, Issue 19, Pages 7706-7711Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2006.11.142
Keywords
ink-jet; printing; conductive pattern; copper nanoparticle
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Ink-jet printing of metal nanoparticles is an attractive method for direct patterning conductive metal lines owing to low-cost, low-waste, and simple process. While most of the researches here focused on novel metals such as gold and silver, we have developed a conductive ink containing copper nanoparticles as an alternative that is inexpensive conductive material. Copper particles with a size of 40-50 nm were synthesized by polyol process, from which the well-dispersed conductive ink with low viscosity was prepared. We have successfully demonstrated a direct writing of the conductive lines using Cu conductive ink. The ink-jet printed copper patterns exhibited metal-like appearance and became highly conductive upon heat treatments. The resistivity of the film reached to 17.2 mu Omega cm at 325 degrees C for I h in vacuum. (c) 2006 Elsevier B.V. All rights reserved.
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