| 摘要 |
PROBLEM TO BE SOLVED: To provide silver-coated copper powder of high quality suitable to a filler for conductive paste, and to provide conductive paste using the same. SOLUTION: The silver-coated copper powder comprises a silver-coated layer on the surface of flake-shaped copper powder which is mechanically flattened, and whose lightness L* prescribed in JIS Z8729 is≥50. In the silver-coated copper powder, a silver-coated layer is provided on the surface of the flake-shaped copper powder which is mechanically flattened, and the average thickness t (nm) of the silver-coated layer, and the lightness L* of the silver-coated copper powder satisfy the relation in inequality; 39+0.76t-3.5×10<SP>-3</SP>t<SP>2</SP>≤L*. The coating weight of silver is, e.g.,≤30 mass%. The coating weight of oxygen is, e.g.,≤1 mass%, and the content of carbon is, e.g.,≤2 mass%. COPYRIGHT: (C)2011,JPO&INPIT
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