SILVER-COATED COPPER POWDER AND CONDUCTIVE PASTE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a silver-coated copper powder that can suppress thickening of conductive paste with time when the paste is prepared without increasing the amount of coating silver.SOLUTION: A silver-coated copper powder comprises silver-coated copper powder particles having a structure where copper powder particles are coated with silver and the surface of the copper powder particles is partially exposed. The coating amount of the silver is 35 mass% or less of the content of copper. In X-ray photoelectron spectroscopy spectra obtained by measuring the surface of the silver-coated copper powder particles using an X-ray photoelectron spectroscopy apparatus (XPS), the ratio of the peak intensity of Cu(I) and Cu(0) to the peak intensity of Cu(II) is 0.02-0.60.