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

Claim 12:
13. The electroplating apparatus according to claim 12, wherein
when the notch of the wafer is not positioned within the coverage area of the third anode, the current density of the third anode is consistent with the current density of the second anode;
with the rotation of the wafer, when the notch of the wafer enters into the coverage area of the third anode, the current density of the third anode is gradually decreased;
when the notch of the wafer leaves the coverage area of the third anode along with the rotation of the wafer, the current density of the third anode is gradually increased to be consistent with the current density of the second anode.