| 摘要 |
PROBLEM TO BE SOLVED: To provide coated copper powder enabling to obtain stable conductivity by addition of small amount, excellent in heat resistance and suitable for an electromagnetic shield and conductive paste. SOLUTION: Coated copper powder is comprised of copper particles and coated copper particles having a nickel alloy layer cladding the copper particles, containing phosphorus and/or boron as an alloying element and additionally including cobalt and/or tungsten according to requirements, and a silver layer coating the nickel alloy layer.
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