Ostrolenk, Faber, Gerb & Soffen
Method of preventing oxidation of copper powder
 A method of preventing oxidation of copper powder which comprises the steps of: PA1 mixing copper powder, boric acid, and a solvent to form a mixture; and PA1 drying the mixture to evaporate the solvent, PA1 the boric acid being used in such an amount that the amount of boron atoms present in the copper powder after the drying step is from 0.01 to 0.1% by weight based on the weight of the copper powder, PA1 the solvent being selected from the group consisting of ketone solvents, hydrocarbon solvents and aromatic solvents, and being used in such an amount that the boric acid concentration of the mixture is not higher than the saturated concentration of boric acid. 
Murata Manufacturing Co., Ltd.
B H H
B22F H05K H01B
inventional additional inventional
Shizuharu Shuji
Watanabe Mushimoto