Copper powder for conductive paste and method for producing same

摘要

There are provided a copper powder for conductive paste, which comprises monodisperse and spherical fine copper particles having a sharp particle size distribution and containing no coarse particles and which can form a thinner electrode film while avoiding a bad influence on electric characteristics thereof, and a method for stably producing such a copper powder for conductive paste. After copper is complexed by adding a complexing agent to an aqueous solution containing copper while blowing air into the solution, the blowing of air is stopped, and then, a reducing agent is added to the solution to deposit copper particles by reduction.

主权项

1. A method for producing a copper powder for conductive paste, the method comprising the steps of:
complexing copper by adding a complexing agent to an aqueous solution containing cuprous oxide or cupric oxide while blowing air into the solution; stopping the blowing of air after complexing copper; and thereafter, adding a reducing agent to the solution to deposit copper particles by reduction.