Patent ID: 8889524
Filing Date: 2014-11-18
Classification: H01L

Abstract:
1. A substrate treating method comprising, in the sequence set forth, (1) a step of temporarily fixing a substrate onto a support via a temporary fixing material, the temporary fixing material comprising a central section (A) having two or more layers and a peripheral section (B) with excellent solvent resistance, the peripheral section (B) being in contact with a peripheral portion of a surface of the support on the substrate side as well as with a peripheral portion of a surface of the substrate on the support side, the central section (A) being in contact with a central portion of the surface of the support on the substrate side as well as with a central portion of the surface of the substrate on the support side, these central portions being within the insides of the respective peripheral portions, the temporary fixing thus resulting in a stack in which the central section (A) is covered with the support, the peripheral section (B) and the substrate; (2) a step of processing the substrate and/or transporting the stack; (3) a step of dissolving at least the peripheral section (B) of the temporary fixing material with a solvent; and (4) a step of heating the residue of the temporary fixing material and separating the substrate from the support.