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

Claim 14:
15. The electroplating apparatus according to claim 14, wherein
when the notch of the wafer is not positioned within the coverage area of the third anode, the switch makes the third anode be connected to the second anode, and both be connected to the second rectifier;
with the rotation of the wafer, when the notch of the wafer enters into the coverage area of the third anode, the switch makes the third anode be connected to the control power supply, and the control power supply adjusts the duty cycle of the output current;
when the notch of the wafer leaves the coverage area of the third anode along with the rotation of the wafer, the switch makes the third anode be connected to the second anode.