Patent ID: 7980611

Claim:
A substrate holding apparatus for holding a part of a periphery of a substrate from upper and lower surfaces of the substrate, the substrate holding apparatus comprising: a thin-plate base plate with a two-pronged portion at a tip end side thereof; a holding plate spaced from said base plate with a clearance therebetween; a driving portion provided in said clearance formed between said base plate and said holding plate; a holding portion formed by a tip end of said two-pronged portion of said base plate and a tip end of said holding plate; and a guide portion provided at said tip end of said two-pronged portion of said base plate and configured to guide a part of the substrate, wherein said driving portion includes: an urging means for always urging a basal end side of said holding plate away from a basal end side of said base plate, an electric magnetic portion arranged near said urging means and configured to attract said basal end side of said holding plate toward said basal end side of said base plate when energized, and a bearing portion arranged nearer to said tip end of said base plate and said holding plate than said electric magnetic portion and said urging means, and constructed to allow said holding plate to swing up-and-down with respect to said base plate, and wherein said guide portion has a guide groove which comes into contact with the upper and lower surfaces and a side surface of the part of the periphery of the substrate.