| 摘要 |
<p>PURPOSE: Conductive microparticles are provided to ensure satisfactory monodisperse property, low cost, resistance to migration and excellent conductivity. CONSTITUTION: Conductive fine particle(100) has a core particle(102) surface coated with a metal-plated coating film layer(104) containing nickel and phosphorus and a multilayer conductive layer comprising a palladium layer(106) as the outer surface. The phosphorus content in region A of the metal-plated coating film layer, at a distance of no greater than 20% of the thickness of the entire metal-plated coating film layer from the surface of the core particle, is 7-15 wt % of the entire region A. The phosphorus content in region B of the metal-plated coating film layer, at a distance of no greater than 10% of the thickness of the entire metal-plated coating film layer from the surface of the metal-plated coating film layer on the palladium layer side, is 0.1-3 wt % of the entire region B. The phosphorus content of the entire metal-plated coating film layer is 7 wt % or greater.</p> |
