Session 21: Novel Conductor and Semiconductor Materials
Synthesis, Characterization, and Isolation of Metal Precursor Inks
Thursday, June 22, 2017
11:40 AM - 12:00 PM
Recent progress in multi-material printing has allowed scientists and engineers to incorporate conductive circuits, sensors, actuators, and other elements into printed components. The associated printing inks frequently use nanoparticles, whose low sintering temperatures allow metal or ceramic materials to be deposited and cured using traditional printing processes and substrates. However, the formulation and stabilization of high quality nanoparticle inks is often complicated by factors including rapid oxidation and particle agglomeration. In contrast, precursor inks are particle-free solutions which can contain high metal content, be printed, and subsequently converted to their metallic state by a thermally or photonically induced chemical reactions. These inks show promise in overcoming many of the problems associated with nanoparticle inks. This paper focuses on inkjet precursor metal ink formulation, complex isolation, and device printing. Copper, nickel, and silver precursor inks have been formulated which have the appropriate rheological properties for inkjet printing. These inks can be sintered rapidly using photonic sintering.
Bruce Kahn is the Director of Business Development for the AMPrint Center at RIT. He has been involved in functional printing and printed electronics since 2002 and is a frequent lecturer and author. In 2014, he received the Flexi Award for Technology Leadership in Education from the FlexTech Alliance. Dr. Kahn has directed research programs on RF energy harvesting using printed metamaterials, rapid automated metrology of printed features, and the influence of scale up and printing process parameters on printed devices using commercial scale flexographic and gravure printing. His work has produced RF energy harvesters (both small and production scale), transparent conductive films, multilayer devices, chemical sensors, and antennas for Radio Frequency Identification (RFID) tags.
Rochester Institute of Technology