CONDUCTIVE FINE PARTICLES AND ANISOTROPIC CONDUCTIVE MATERIAL

• Main Authors: ENOMOTO NANA, AKAI KUNIHIKO
• Format: Patent
• Language: English
• Published: 13.09.2012
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CONDUCTORS; ELECTRICITY; INSULATORS; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; NANOTECHNOLOGY; PERFORMING OPERATIONS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

Conductive fine particles have core particle surfaces coated with a metal-plated coating film layer containing nickel and phosphorus and a multilayer conductive layer comprising a palladium layer 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, and the phosphorus content of the entire metal-plated coating film layer is 7 wt % or greater.