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The Impact and Spreading of Ink Jet Printed Droplets

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Ink jet printing is a fabrication technique that shows potential for use in fields such as printed electronics, biomaterials and MEMS. The attainable feature size and spacing of a component manufactured in this fashion is determined by the generated droplet size, how the droplets interact with the substrate and how adjacent droplets interact with each other. An individual droplet of material-laden ink will form a deposit with a diameter dependent upon the generated droplet size and the contact angle formed between the droplet and the substrate. This diameter can be accurately predicted using a spherical cap assumption and macroscopic contact angle data. As droplets are moved closer together on a substrate, they appear to interact with each other at distances greater than the predicted equilibrium diameter of a droplet. The amount of interaction between droplets increases with decreasing equilibrium contact angle. This interaction could either be due to changes in the local vapour pressure around previously deposited droplets or impact-driven spreading of the droplet beyond the equilibrium state.
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Document Type: Research Article

Publication date: 2006-01-01

More about this publication?
  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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