Patent ID: 11859303

Abstract:
A plating apparatus for depositing metal on a substrate, comprising a membrane frame (14), a catholyte inlet pipe (30) and a center cap (40). The membrane frame (14) has a center passage (144) which passes through the center of the membrane frame (14). The catholyte inlet pipe (30) is connected to the center passage (144) of the membrane frame (14). The center cap (40) is fixed at the center of the membrane frame (14) and covers over the center passage (144) of the membrane frame (14). The top of the center cap (40) has a plurality of first holes (42). The catholyte inlet pipe (30) supplies catholyte to the center cap (40) through the center passage (144) of the membrane frame (14), and the catholyte is supplied to a center area of the substrate through the first holes (42) of the center cap (40).