Conductive powder and a manufacturing method thereof, the conductive powder paste, the method of manufacturing the electroconductive powder paste

The present invention relates to a conductive powder consisting of large particles and scaly small particles of polyhedral shape, the aspect ratio of the small particles is 3 or more and an aspect ratio of the small particles of the aspect ratio of the large particles 1. 3 times or more greater, about conductive powder comprising surface treated with a fatty acid. Conductive powder of the present invention, since a polyhedral shape and scaly large particles and small particles, a good contact between the particles. The conductive paste using the conductive powder of the present invention does not contact with the particles the dots, to surface contact with each other, excellent conductivity and thermal conductivity. Furthermore, the conductive paste of the present invention is excellent in the filling of the via hole.