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Printed Electronics World
Posted on February 2, 2011 by  & 

Yissum and Vaxan collaborate on printed electronics ink

Yissum Research Development Company, the Technology Transfer Company of the Hebrew University of Jerusalem, and Vaxan Steel a Korean company in the field of innovative printing, signed a licensing and research agreement for the development of silver nanoparticles and silver-coated copper nanoparticles for conductive inks.
These inks can be utilized in a variety of printing technologies, including inkjet printing. The novel conductive inks were invented by Professor Shlomo Magdassi, Dr. Alexander Kamyshny and Michael Grouchko from the Institute of Chemistry at the Hebrew University.
According to the terms of the agreement, Yissum will grant Vaxan a license to commercialize the technology exclusively in Asia, excluding Israel and former Soviet Union countries, and will receive in return research fees and royalties from future sales.
One of the exciting fields of the present and near future is printed electronics - the ability to print electric circuits on almost any surface, including paper, plastic, silicon and ceramics. Printed electronics are in use, or are considered for use in multiple applications, including displays and thin-film photovoltaics, radio frequency identification (RFID) tags, OLED lighting and sensors.
Conducting printing for the electronics industry is traditionally achieved by lithography and screen printing technologies. However, these methods are usually time consuming and expensive. Therefore, during the recent years the printing electronics industry trends towards digital printing, with inkjet printing as the most appealing technology. In this printing technology, droplets of ink containing metallic nanoparticles are jetted from a micron size orifice, onto the substrate which can be a plastic sheet, a glass or a silicon wafer.
Silver nanoparticles are particularly appealing for inkjet printing, since silver is the most conductive of the metals, and in contrast to other metals, oxidation does not harm the conductivity of the final film. For this reason, silver was the first material used for inks and conductive printing on a wide scale. Copper, on the other hand, is much cheaper than silver (at about 1/100 the cost of silver), but is readily oxidized by air, thereby becoming non-conductive. Prof. Magdassi and his colleagues invented copper nanoparticles that are covered by a thin layer of silver, thereby producing cheap, conductive, air-stable particles that can be readily used as conductive ink for a variety of applications.
Mr. Duek Chi Lee, the CEO of VAXAN said, "The nanoechnology application which we have licensed from Yissum will be applied to semiconductors, IT, LED, and OLED industries. We are certain that this technological innovation will be an international success in electronic markets of the future. Once again, I would like to thank Yissum, Prof. Magdassi and Global Tech Korea who helped promote this collaboration between Korea and Israel."
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