Patent ID: 7901551
Filing Date: 2011-03-08
Classification: C25D,H01L

Abstract:
1. A substrate holder, comprising: a fixed holding member and a movable holding member for holding a substrate therebetween; and a sealing member for sealing an outer circumferential end of the substrate when the substrate is held between said movable holding member and said fixed holding member, wherein said fixed holding member and said movable holding member have respective tapered portions for engaging each other and positioning said fixed holding member and said movable holding member in central alignment with each other when the substrate is held between said movable holding member and said fixed holding member, and wherein said tapered portion of said movable holding member is adapted to guide an outer circumferential edge of the substrate to position the substrate when the substrate is held between said movable holding member and said fixed holding member; and wherein said movable holding member has a plurality of leaf spring members configured such that each of said leaf spring members makes elastic contact with the outer circumferential edge of the substrate when the substrate is held between said movable holding member and said fixed holding member so that a center of the substrate coincides with a center of said movable holding member.