The effect of bonding force on the electrical performance and reliability of NCA joints processed at a lowered temperature
- 75 Downloads
The effect of the bonding force during flip chip-on-flex (FCOF) assembly on the electrical performance of the nonconductive adhesive (NCA) interconnects was investigated in this study, under the precondition of a reduced processing temperature in order to minimize thermally-induced damage to the low-cost flexible substrates. Pressure cooker tests (PCT) were performed to assess the reliability performance of the adhesive joints in high temperature and high humidity conditions. The assembly process was modified and the processing temperature and the bonding force were adjusted according to the experimental results to enable the use of low cost substrates, such as poly(ethylene terephthalate) (PET) materials in smart card fabrication.
KeywordsSmart Card Bonding Temperature Electrical Performance Bonding Force Interfacial Delamination
The authors would like to thank the City University of Hong Kong for providing the research studentship, and the EPA Centre, the City University of Hong Kong for continued support.
- 2.Hatada K, Fujimoto H, Ochi T, Ishida Y (1990) IEEE Trans Compon Pack Manuf Technol 13:521Google Scholar
- 3.Pajonk J (2004) In: Proceedings of the 29th IEEE/SEMI international electronics manufacturing technology symposium, San Jose, CA, USA, July, p 165Google Scholar
- 4.Hatakeyama T, Quinn FX (1994) In: Thermal analysis fundamentals and applications to polymer science. John Wiley & sons Ltd., EnglandGoogle Scholar
- 6.Settle FA (1997) In: Handbook of instrumental techniques for analytical chemistry. Prentice Hall, New JerseyGoogle Scholar