Journal
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 53, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/JJAP.53.05HC07
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Funding
- National Research Foundation of Korea [NRF-2010-0024537, NRF-2013R1A1A2011415]
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An innovative electrical current sintering technique is applied to joule-heat conductive ink by increasing current gradually through a stepwise-form. This stepwise electrical sintering technique is devised to overcome thermal damage of printed conductive ink line during electrical sintering due to its high initial resistance. To monitor a stepwise electrical sintering method, in-situ specific resistance was measured. Surface morphology of the sample was observed by field-emission scanning electron microscope. By increasing the current gradually, the conductive line can endure higher current because the specific resistance has dropped gradually during the process. Finally, enhanced final-step current produces lower specific resistance of the conductive line than that obtained from a constant current-supplying electrical sintering method without damaging printed conductive line. (C) 2014 The Japan Society of Applied Physics
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