DOUBLE LAYER-COATED COPPER POWDER, METHOD OF PRODUCING THE DOUBLE LAYER-COATED COPPER POWDER, AND ELECTRICALLY CONDUCTIVE PASTE USING THE DOUBLE LAYER-COATED COPPER POWDER

摘要

PROBLEM TO BE SOLVED: To provide copper powder which has satisfactory oxidation resistance and has excellent thermal shrinkage resistance in such a manner that its shrinkage on sintering is reduced in the temperature range where sintering is possible even if it is fine.;SOLUTION: In the double layer-coated copper powder obtained by providing the surfaces of the particulate matters of copper powder as the core material with an inorganic matter coat layer, the surfaces of the particulate matters of copper powder as the core material are provided with a first inorganic coat layer composed of one or two kinds selected from copper oxide and copper suboxide, and the outer shell of the first inorganic coat layer is provided with a second inorganic matter coat layer composed of inorganic oxide consisting of one or more kinds selected from silicon oxide, aluminum oxide, magnesium oxide, zirconium oxide, titanium oxide and zinc oxide.;COPYRIGHT: (C)2005,JPO&NCIPI