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Surface treatments for inkjet printing onto a PTFE-based substrate for high frequency applications

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journal contribution
posted on 2013-09-17, 15:39 authored by Ying Ying Lim, Yee GohYee Goh, Changqing Liu
Inkjet printing onto laminates for use in high frequency applications (high frequency laminates) is challenging, due to the substrate surface roughness present after etching away the copper layer(s). This has a detrimental effect on interconnect losses as the frequency increases. In this paper, different surface treatments to reduce the surface roughness of a typical high frequency laminate (RO3006) are investigated. In particular, the importance of matching the substrate surface energy to the ink to achieve a smooth coated layer for the case of a UV cured insulator is demonstrated. This is achievable within the parameters of heating the platen, which is a more flexible approach compared to modifying the ink to improve the ink-substrate interaction. In printing onto the surface modified substrates, the substrate roughness was observed to affect the printed line width significantly. A surface roughness factor was introduced to take into account the phenomenon by modifying the original formula of Smith et al. Lastly, the authors show that the printed line widths are also influenced by the surface tension arising from charges present on the surface modified substrates.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

LIM, Y.Y., GOH, Y.M. and LIU, C., 2013. Surface treatments for inkjet printing onto a PTFE-based substrate for high frequency applications. Industrial and Engineering Chemistry Research, 52 (33), pp. 11564-11574.

Publisher

© American Chemical Society

Version

  • AM (Accepted Manuscript)

Publication date

2013

Notes

This document is the Accepted Manuscript version of a Published Work that appeared in final form in the journal Industrial and Engineering Chemistry Research [copyright © American Chemical Society] after peer review and technical editing by the publisher. To access the final edited and published work see: http://pubs.acs.org/doi/abs/10.1021/ie4006639

ISSN

0888-5885

eISSN

1520-5045

Language

  • en

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