Patent ID: 7211168

Claim:
A method for stripping a supporting plate having a diameter identical to or larger than the diameter of a substrate to which the supporting plate is attached, wherein a plurality of penetrating holes are provided in the thickness direction of the supporting plate so as to allow a solvent to pass therethrough, wherein a diameter of the penetrating holes is 0.3–0.5 mm, and a pitch of the penetrating holes is 0.5–1.0 mm; and wherein the supporting plate comprises a low thermal expansion material having a thermal expansion coefficient of 1.5×10-6 or less from a substrate, comprising the steps of: supplying a solvent for dissolving an adhesive bonding the supporting plate and the substrate from outside the supporting plate; allowing the solvent to reach the adhesive through the penetrating holes of the supporting plate so as to dissolve the adhesive which has been cured; and stripping the supporting plate from the substrate by fixing the position of the substrate and lifting the support plate away from the substrate.