Electronic Materials Letters

The Korean Institute of Metals and Materials (대한금속재료학회)
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Using a Functional Epoxy, Micron Silver Flakes, Nano Silver Spheres, and Treated Single-Wall Carbon Nanotubes to Prepare High Performance Electrically Conductive Adhesives

  • Cui, Hui-Wang (Key State Laboratory for New Displays & System Applications and SMIT Center, College of Automation and Mechanical Engineering, Shanghai University) ;
  • Li, Dong-Sheng (Key State Laboratory for New Displays & System Applications and SMIT Center, College of Automation and Mechanical Engineering, Shanghai University) ;
  • Fan, Qiong (Key State Laboratory for New Displays & System Applications and SMIT Center, College of Automation and Mechanical Engineering, Shanghai University)
  • Published : 2013.05.20
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Abstract

In this study, a matrix resin containing a functional epoxy, a reactive diluent, a silane-coupling agent, and a curing agent was used to fabricate three modal electrically conductive adhesives (ECAs) with micron silver flakes, nano silver spheres, and treated single-wall carbon nanotubes (CNT). Results showed that too many micron silver flakes reduced the bulk resistivity and adhesion strength of uni-modal ECAs (matrix resin and micron silver flakes). As the nano silver spheres increased, the bulk resistivity of bi-modal ECAs (matrix resin, micron silver flakes, and nano silver spheres) firstly decreased, and then increased again. The adhesion strength decreased also. The bulk resistivity and adhesion strength of tri-modal ECAs (matrix resin, micron silver flakes, nano silver spheres, and treated CNT) both were reduced by the treated CNT greatly. These ECAs could be cured at $120^{\circ}C$ or any higher temperature than this with different curing time. They all had high temperature stability with a pyrolysis temperature above $350^{\circ}C$ and a glass transition temperature around $180^{\circ}C$.

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