Patent ID: 7601248

Claim:
A substrate holder comprising: a fixed holding member and a movable holding member for holding a substrate therebetween, said fixed holding member and said movable holding member being designed to both be immersed together in a plating solution with the held substrate; an inner sealing member for making pressure contact with a peripheral portion of the substrate, when held between said fixed holding member and said movable holding member, to seal the peripheral portion; an outer sealing member, disposed around the substrate when held between said fixed holding member and said movable holding member, for sealing between said fixed holding member and said movable holding member by making contact with said fixed holding member and said movable holding member, each of said inner sealing member and said outer sealing member forming a barrier between the plating solution and a back surface of the substrate; a plate-shaped spring member for biasing the substrate towards said fixed holding member when releasing holding of the substrate from between said movable holding member and said fixed holding member; and a press ring rotatable supported on said movable holding member such that said movable holding member is to be pressed via said press ring against said fixed holding member when the substrate is to be held between said fixed holding member and said movable holding member.