Electroplating for high aspect ratio vias in PCB manufacturing: enhancement capabilities of acoustic streaming

  • Nadezhda Strusevich Marc P. Y. Desmulliez Eitan Abraham David Flynn Thomas Jones Mayur Patel Christopher Bailey
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  • School of Computing and Mathematical Sciences, Old Royal
    Naval College, University of Greenwich , Park Row,
    London SE10 9LS, UK School of Engineering & Physical Sciences, Heriot-Watt
    University, Edinburgh EH14 4AS, UK

Received date: 2013-08-30

  Revised date: 2013-09-03

  Online published: 2013-09-23

Abstract

This paper considers the copper electrodeposit-ion processes in microvias and investigates whether the quality of the electroplating process can be improved by acoustic streaming using megasonic transducers placed into a plating cell. The theoretical results show that acoustic streaming does not take place within the micro-via (either through or blind-via’s), however it does help improve cupric ion transport in the area close to the mouth of a via. This replenishment of cupric ions at the mouth of micro-via leads to better quality filling of the micro-via through diffusion compared to basic conditions. Experiments showing the improved quality of the filling of vias are also presented.

Cite this article

Nadezhda Strusevich Marc P. Y. Desmulliez Eitan Abraham David Flynn Thomas Jones Mayur Patel Christopher Bailey . Electroplating for high aspect ratio vias in PCB manufacturing: enhancement capabilities of acoustic streaming[J]. Advances in Manufacturing, 2013 , 1(3) : 211 -217 . DOI: DOI10.1007/s40436-013-0039-9

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