Patent ID: 8801971

Claim:
A manufacturing method of a conductive substrate, comprising: the step of forming, on a substrate, a layer containing a metal having catalytic activity, the step of forming, on the layer, a copper particle layer containing first type particles having a core/shell structure having a core region comprising copper and a shell region comprising copper oxide, and a second type particles comprising a copper oxide, and the step of treating the copper particle layer with a treatment solution which contains a chemical agent for ionizing or complexing the copper oxide, and a reducing agent for reducing a copper ion or copper complex to be made into metallic copper, wherein the chemical agent for ionizing or complexing the copper oxide [is at least one selected from the group consisting of basic nitrogen-containing compounds, salts of basic nitrogen-containing compounds, EDTA, bipyridyl, and β-diketones] comprises bipyridyl, EDTA, and at least one selected from the group consisting of ammonia water, ethylenediamine and butylamine, and the reducing agent for reducing copper ion or copper complex comprises dimethylamineborane.