Patent ID: 11926920
Assignee: ACM RESEARCH (SHANGHAI) INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. An electroplating apparatus for electroplating on a front surface of a wafer, the electroplating apparatus comprising a plurality of anodes and a plurality of rectifiers or a plurality of power supplies, the plurality of anodes collectively covering a front surface of the wafer for forming electric fields on the front surface of the wafer, wherein an independent electric field is formed in a designated area, and an intensity of the independent electric field is independently controlled, the plurality of anodes is respectively controlled by the plurality of rectifiers or the plurality of power supplies, wherein at least one of the plurality of the rectifiers or at least one of the plurality of power supplies is configured to reduce a total amount of power received by a notch of the wafer while the notch is positioned within the designated area, wherein the plurality of anodes and their respective regions has separate liquid circulation conduits, and partitions are arranged between areas covered by the plurality of anodes, so that separate electric field spaces are formed.