The application of microvias is to reduce the size and weight of the printed circuit board, and to enhance its electrical performance. In many instances, the plating of microvias creates a bottleneck for High Density Interconnection (HDI) manufacture. In this study, the effects of waveform on the copper plating process were investigated. The results showed that the addition of a spike, and a decrease in forward current can improve the throwing power in plating quality. The study also found that the combination of multiple spikes, a low forward current and a high reverse current can significantly improve copper distribution in microvias plating.