Self-Reducing Copper Precursor Inks and Photonic Additive Yield Conductive Patterns under Intense Pulsed Light.

Citation:

Rosen YS, Yakushenko A, Offenhausser A, Magdassi S. Self-Reducing Copper Precursor Inks and Photonic Additive Yield Conductive Patterns under Intense Pulsed Light. ACS OmegaACS Omega. 2017;2 (2) :573 - 581.

Date Published:

2017///

Abstract:

Printing conducting copper interconnections on plastic substrates is of growing interest in the field of printed electronics. Photonic curing of copper inks with intense pulsed light (IPL) is a promising process as it is very fast, and so can be incorporated in roll-to-roll prodn. We report on using IPL for obtaining conductive patterns from inks composed of submicron particles of copper formate, a copper precursor that has a self-redn. property. Decompn. of copper formate can be performed by IPL, and is affected both by the mode of energy application and the properties of the printed precursor layer. The energy application mode was controlled by altering three pulse parameters: duration, intensity, and repetitions at 1 Hz. Since the decompn. results from energy transfer via light absorption, carbon nanotubes (CNTs) were added to the ink to increase the absorbance. We show that there is a strict set of IPL parameters necessary to obtain conductive copper patterns. Finally we show that by adding as little as 0.5 wt.% SWCNTs to the ink, the absorptance was enhanced by about 50%, and the threshold energy required to obtain a conductive pattern decreased by ∼25%. These results have major implications for tailoring inks intended for IPL processing. [on SciFinder(R)]

Notes:

CAPLUS AN 2017:271526(Journal; Online Computer File)