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Evaporative Deposition of Molecular Organics in Ambient with a Molecular Jet Printer

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We present the concept and the application of the molecular jet (MoJet) printing technique. Using this technique, we demonstrate patterned molecular organic semiconducting thin films directly printed by local evaporative deposition. Three stages are involved in the printing process. In the first stage, HP thermal InkJet printing technology is used to deliver ink drops to a micromachined silicon membrane consisting of an array of micrometersize pores and an integrated heater. Once the ink is filled inside the pores, in the second stage a small current is passed through the heater to completely drive off solvent from the micro-pores. In the final stage, pulsed current of larger magnitude is applied to heat up the pores to a temperature sufficient to discharge the dry ink materials out of the pores and form molecular flux. The flux is then deposited onto a nearby substrate to form designated thin film patterns.

The MoJet printing technique can be applied to pattern solution-processable molecular organic thin films, providing fluxon-demand in an ambient environment.

Document Type: Research Article

Publication date: January 1, 2006

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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