Abstract:
An electrolytic copper plating method characterized by carrying out electrolytic copper plating by using phosphorus-containing copper as an anode, wherein the crystal particle size of the phosphorus-containing copper anode is 10-1500 mum when an anode current density at electrolyzing is at least 3A/dm2, and the crystal particle size of the anode is 5-1500 mum when an anode current density at electrolyzing is less than 3A/dm2. A method of electrolytic-copper-plating a semiconductor wafer which restricts particles such as sludge occurring on the anode side in a plating solution and prevents deposition of particles on the semiconductor wafer, an electrolytic copper plating-use phosphorus-containing copper anode, and a semiconductor wafer with little particles deposition plated by using them.
Abstract:
A copper-alloy sputtering target most suitable for formation of an interconnection material of a semiconductor device, particularly for formation of a seed layer, characterized in that the target contains 0.4 to 5 wt% of Sn, and the structure of the target does not substantially contain any precipitates, and the resistivity of the target material is 2.2 microΩcm or more. This target enables formation of an interconnection material of a semiconductor device, particularly a uniform seed layer stable during copper electroplating and is excellent in sputtering film forming characteristics. A method for manufacturing such a target is also disclosed.
Abstract:
An copper electroplating method for performing copper electroplating by using an anode formed of pure copper in which the grain size of the pure copper anode is not greater than 10 microm, or not smaller than 60 microm, or pure copper non-recrystallized. A copper electroplating method of a semiconductor wafer which can suppress generation of particles such as sludge on the anode side in plating liquid and prevent adhesion of particles to the semiconductor wafer when performing the copper electroplating, a pure copper anode for the copper electroplating, and the semiconductor wafer plated thereby with little adhesion of particles.