Patent ID: 10836018

Abstract:
Provided are a substrate holding device and a substrate holding method that enhance the precision of the shape of a substrate while holding the substrate. The substrate holding device includes a first holding member 1, including a plate-shaped first base 10, and a second holding member 2, including a thin plate-shaped second base 20. The first base 10 has an airway 102 extending to the upper surface of the first base 10. The second base 20 has a through hole 202 extending in a thick direction of the second base 20 at a center portion of the second base 20. The second base 20 includes, on the upper surface of the second base 20, multiple protrusions 211, which protrude upward, and at least one annular ridge 212, which protrudes upward in a substantially annular shape coaxial with the first base 10 and surrounds an upper opening of the through hole 202 and the multiple protrusions 211.