High purity cupric oxide fine powder and a method of manufacturing the same, and the copper ion supplying method of copper sulfate aqueous solution using a high-purity cupric oxide fine powder

摘要

PROBLEM TO BE SOLVED: To provide high purity cupric oxide fine powder with high copper oxide purity and high solubility into a plating liquid and a method for producing the cupric oxide powder and to provide a method for feeding copper ions to a copper sulfate aqueous solution used in the electroplating of copper using the high purity cupric oxide fine powder.;SOLUTION: In the method for producing the high purity cupric oxide fine powder, coarse cupric oxide powder obtained by heat treatment is subjected to grinding treatment. In the method, the high purity cupric oxide fine powder has a bulk density of at least 0.80 g/cm³, a tap density of ≥1.40 g/cm³ and ≤1.90 g/cm³, a specific surface area of at least 7 m²/g, an average particle size of 150 nm or below, and a CuO content of at least 98.5 wt.%.;COPYRIGHT: (C)2012,JPO&INPIT