Invention Grant
US07648621B2 Copper electroplating method, pure copper anode for copper electroplating, and semiconductor wafer plated thereby with little particle adhesion 有权
铜电镀方法,用于铜电镀的纯铜阳极和由此形成的具有很小颗粒粘附性的半导体晶片

Copper electroplating method, pure copper anode for copper electroplating, and semiconductor wafer plated thereby with little particle adhesion
Abstract:
The present invention pertains to an electrolytic copper plating method characterized in employing pure copper as the anode upon performing electrolytic copper plating, and performing electrolytic copper plating with the pure copper anode having a crystal grain diameter of 10 μm or less or 60 μm or more or a non-recrystallized anode. Provided are an electrolytic copper plating method and a pure copper anode for electrolytic copper plating used in such electrolytic copper plating method capable of suppressing the generation of particles such as sludge produced on the anode side within the plating bath upon performing electrolytic copper plating, and capable of preventing the adhesion to a semiconductor wafer, as well as a semiconductor wafer plated with the foregoing method and anode having low particle adhesion.
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