posted on 2009-02-10, 13:12authored byGuangbin Dou, David Whalley, Changqing Liu
Anisotropic Conductive Adhesives (ACAs) consist of a polymer adhesive matrix containing fine conductive
particles. The primary objective of this experimental research was to establish a clearer understanding of
the effects of the bonding force and load rate on the deformation of individual ACA particles. This has been
achieved through measurements of the deformation against force using a specially configured Nano-indenter
machine, where the “indenters”, instead of being a point, had a flat tip 30 μm in diameter. The merit of
using this machine is that very small forces, of the order of 100 mN, can be accurately applied to the
particles to a resolution of 100 nN and the resulting deformations, of less than 6 μm, can then be recorded to
a resolution of 0.1 nm. The results showed that the ACA particle deformation was not linear and the
force/deformation at which particle crushing occurs could be determined from the profile of the force versus
deformation. The crush points and the deformation processes were affected by the load rate.
History
School
Mechanical, Electrical and Manufacturing Engineering
Citation
DOU, G., WHALLEY, D.C. and LIU, C., 2006. Deformation property measurement for single anisotropic conductive adhesive particles. Proceedings of the 1st IEEE Electronic Systemintegration Technology Conference, Dresden, 5-7th September 2006, vol. 2, pp. 840-847