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Development of a Femtoliter Piezo Ink-jet Head for high resolution printing

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Inkjet printing technology is used in the manufacture of color filters and alignment layer film for liquid crystal displays. The minimum droplet volume is achieved under a few picoliters and the head prints lines of a few tens of micrometers. In order to expand range of applications of the inkjet technology, we consider that a inkjet head is needed with the ability to micropattern feature sizes of 10 micrometers. The size of features depends mainly on the volume of ink contained in droplets fired from an inkjet head. This work presents a new inkjet head comprising piezo-electric actuators that fires droplets having a volume of less than 1 picoliter. Examples in which the inkjet head was used to directly deposit ink droplets to micropattern devices are described. An efficient approach has been taken to develop the inkjet head so that the head structures are optimized and micro-droplet behavior is controlled. The inkjet head is found to be capable of firing 500-femtoliter droplets and forming micropatterns on a substrate. The droplets exhibit a stable, straight ├čight path.

Document Type: Research Article

Publication date: January 1, 2007

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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