New anisotropic conductive film (ACF)

Asahikasei has originally developed the new conductive powder AMG/sup R/ which has a specific structure mainly composed of copper and a small amount of silver, wherein its particle´s surface is quite rich in silver component in spite of containing a small amount of silver throughout the particle. The configuration of AMG are summarized here: (1) the Cu-Ag alloy powder is mainly composed of copper and a small amount of silver; (2) the particle surface is rich in silver component; (3) the shape is nearly spherical. Thanks to this specific structure, AMG shows excellent performance, such as high electroconductivity due to its composition of copper and silver, excellent reliability and less ion-migration because of its specific structure when applied to ACF.