The Impact and Spreading of Ink Jet Printed Droplets
Abstract: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.
Document Type: Research Article
Publication date: 2006-01-01
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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