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

Claim 13:
14. The electroplating apparatus according to claim 1, wherein the plurality of anodes comprises three anodes:
a first anode, the first anode being circular and covering a central area of the wafer, the first anode being connected to a first rectifier of the plurality of rectifiers;
a second anode, the second anode being a ring with a notch and covering a peripheral area of the wafer, the second anode being connected to a second rectifier of the plurality of rectifiers;
a third anode, disposed at a position of the notch of the second anode, the third anode being connected to a switch, the switch being connected to the second anode and a control power supply, the switch being switched so that the third anode being connected to the second anode or the control power supply;
wherein the first anode, the second anode and the third anode collectively cover the entire area of the wafer.