To demonstrate the reproducibility of ultrasonic agitation, we plated using a mechanical stirrer instead of the ultrasonic generator. Figures 5(a) and 5(b) show scanning electron micrographs of nickel-coated probes. They were plated while adding agitation with stirrer speeds of 100 and 300 rpm to the plating solution, respectively. However, we could not control the decreasing metal thickness profile due to low reproducibility.