| 초록 |
As an alternative to tin-lead solders, electrically conductive adhesives (ECAs) generally consist of a polymeric resin and conductive fillers that mostly are metal particles to provide conductive paths. In spite of many advantages compared with tin-lead solder, ECAs have limitations including lower electrical conductivity, poor impact strength and unstable network due to large contact points of the few micrometer-sized metal particles. To overcome these problems, we prepared ECAs based on polyurethane filled with both nanometer-sized silver particles and multiwalled carbon nanotubes as conductive fillers. The both fillers allowed ECAs to evaluate improved electrical conductivity and lower percolation threshold than using only one of them. Electrical conductivity of the prepared specimens was measured by using four-point probe. Morphology and size of fillers were observed by scanning electron microscopy and transmission electron microscopy. |
