US Patent 9034214 Fine silver particle powder, method for manufacturing the same, silver paste using the powder, and method of use of the paste

A method suitable for mass production of nanoparticles with a uniform particle diameter is provided. It is an object to provide a powder of the nanoparticle obtained by this method, a dispersion containing the nanoparticles, and a paste containing the nanoparticles. There is provided a method for manufacturing silver particles including the step of reducing silver in a silver solution containing a protective agent composed of an organic material and a copper component in an amount of 1 to 1,000 ppm relative to the amount of silver to obtain particles having an average particle diameter (DTEM) of 5 to 100 nm as measured using a transmission electron microscope.