Patent ID: 11859303
Assignee: ACM RESEARCH (SHANGHAI) INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A plating apparatus for depositing metal on a substrate, comprising:
a membrane frame, having a center passage which passes through the center of the membrane frame, a catholyte inlet connecting to the center passage, a holding cavity, and a plurality of branch pipes extending from the center to edge of the membrane frame, wherein every branch pipe is connected to the catholyte inlet, every branch pipe has a plurality of spray holes, and the holding cavity is connected to a top end of the center passage;
a catholyte inlet pipe, connecting to the catholyte inlet of the membrane frame;
a center cap, fixed at the holding cavity and covering over the center passage of the membrane frame, the top of the center cap having a plurality of first holes;
wherein the catholyte inlet pipe supplies catholyte to the center cap through the center passage of the membrane frame, and the catholyte is supplied to a center area of the substrate through the first holes of the center cap; and
an anode chamber and a cathode chamber, the anode chamber and the cathode chamber being separated by a membrane which is positioned on the membrane frame, wherein the anode chamber has a side wall, the side wall of the anode chamber defines a plurality of discharge holes, every discharge hole is connected to a discharge passage, wherein the anode chamber is divided into multiple anode zones and every two adjacent anode zones are separated by a vertically arranged partition, every anode zone accommodates an annular anode, every anode zone has an independent anolyte inlet and an independent anolyte outlet.