Patent ID: 8080123

Claim:
A method for stripping a supporting plate from a circuit-formed surface of a substrate to which the supporting plate is bonded with an adhesive, comprising the steps of: prior to the supporting plate being bonded to the substrate, forming a first penetrating hole in a substantially central portion of the supporting plate in the thickness direction, forming grooves connecting with the first penetrating hole on a surface of the supporting plate to be contacted with the adhesive, and forming a second penetrating hole connecting with the grooves in a peripheral portion of the supporting plate in the thickness direction; providing a second plate which has a first penetrating hole formed in a substantially central portion thereof in the thickness direction, a second penetrating hole formed in a peripheral portion thereof in the thickness direction, and a hole for attracting the supporting plate formed between the first penetrating hole and the second penetrating hole in the radial direction of the second plate; engaging the second plate to the supporting plate which is bonded to the substrate such that the first and second penetrating holes of the second plate are aligned with the first and second penetrating holes of the supporting plate; supplying a solvent from outside to the first penetrating hole of the second plate and to the aligned first penetrating hole formed of the supporting plate; distributing the solvent from the first penetrating hole of the supporting plate through the grooves formed on the surface of the supporting plate in contact with the adhesive so as to dissolve the adhesive on the surface contacted with the substrate by the solvent; draining the solvent used for dissolving the adhesive from the second penetrating holes of the supporting plate the second plate; and supplying air from outside to the first penetrating hole of the second plate so as to distribute the air from the first penetrating hole of the supporting plate to the grooves which connect with the first penetrating hole of the supporting plate after the step of dissolving the adhesive.