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

Claim 18:
19. The electroplating apparatus according to claim 18, wherein
when the notch of the wafer is not positioned within the coverage area of the second anode, the current density of the second anode is consistent with the current density of the first anode;
with the rotation of the wafer, when the notch of the wafer enters into the coverage area of the second anode, the current density of the second anode is gradually decreased;
when the notch of the wafer leaves the coverage area of the second anode along with the rotation of the wafer, the current density of the second anode is gradually increased to be consistent with the current density of the first anode.