Molecular dynamics and discrete element modeling studies of underfill

N. Iwamoto, M. Li, S. J. McCaffery, M. Nakagawa, G. Mustoe

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


It is well known that capillary action drives the standard underfill phenomenon. However, the underling principles which govern the flow properties and specific formulation tradeoffs are in need of basic understanding. For instance, flow speed, filler settling, filler striation and voiding are all properties that require a mechanistic understanding; and although binder and filler effects are expected from a combination of surface energy and particle dynamics drivers, the simple identification of the problem does not instruct how to control these effects. For the formulator or the end-use engineer, such understanding must be reduced to controllable variables. In order to address these issues both molecular modeling and discrete element modeling have been engaged to understand the formulation constituent effects. Both models similarly engage basic Newtonian dynamics to derive multi-body system simulations.

Original languageEnglish
Pages (from-to)473-478
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1998
Externally publishedYes
EventProceedings of the 1998 International Symposium on Microelectronics - San Diego, CA, USA
Duration: Nov 1 1998Nov 4 1998

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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