Patent ID: 9117869
Filing Date: 2015-08-25
Classification: H01L,Y10T

Abstract:
1. A chucking device that vacuum-sucks and holds a substrate, the chucking device comprising: a first plate having a plurality of through-holes and being mounted with a substrate, the plurality of through-holes penetrating through both sides of the first plate; a member that supports a surface other than a substrate mounting surface of the first plate, transmits a vacuum state to the substrate through the plurality of through-holes, and limits a conductance; an exhaust unit that exhausts air through the member and the plurality of through-holes of the first plate; and a second plate having a plurality of through-holes and disposed on a side of the member opposite to the first plate, wherein the exhaust unit vacuum-sucks the substrate through the through-holes of the second plate, and wherein the member is a sheet member having a thickness smaller than that of the first and second plates.