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Characterisation of metal-polymer interaction forces by AFM for insert moulding applications

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journal contribution
posted on 10.09.2020, 12:26 by Hrushikesh Abhyankar, Patrick Webb, Geoff West, David Hutt
There is a growing interest in the overmoulding of electronics with thermoplastics and the embedding of electronics in 3D printed parts. However long term device reliability requires good adhesion between the metallic surfaces of the electronic components and the overmoulding polymer. In order to provide a guide to material selection, interaction forces between tin, a common electronics metallisation and six commodity thermoplastics were studied. The force measurements were undertaken using Atomic Force Microscopy (AFM) with probes functionalised with tin particles. The particles were attached to the probes by a novel method using a Focused Ion Beam (FIB) instrument. Highly consistent cantilever deflections at pull-off were obtained, allowing the thermoplastics to be robustly ranked by strength of interaction with tin as: PC > PMMA > PBT > ABS > PS > PA 6. From consideration of possible contributions to the pull-off forces measured, it was concluded the data and the developed AFM tip functionalisation technique are likely to be useful in materials selection for electronics overmoulding with thermoplastics. The FIB functionalisation technique may be useful in the wider context of investigations of other metal-polymer interaction forces, for example with alloys, where other methods of functionalisation may be difficult to apply.

Funding

3D-Mintegration: the Design and Manufacture of 3D Integrated Miniaturised Products EP/C534212/1

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Polymer Engineering and Science

Citation

Abhyankar, H. ... et al., (2020). Characterisation of metal-polymer interaction forces by AFM for insert moulding applications. Polymer Engineering and Science, In Press.

Publisher

Wiley

Version

VoR (Version of Record)

Rights holder

© The authors

Publisher statement

This is an Open Access Article. It is published by Wiley under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Acceptance date

01/09/2020

Publication date

2020-10-23

ISSN

0032-3888

eISSN

1548-2634

Language

en

Depositor

Dr Patrick Webb Deposit date: 7 September 2020

Licence

Exports