Patent ID: 8709912

Claim:
A method for manufacturing a semiconductor device, comprising the following steps in order: a step of forming an adhesive layer on one surface of a substrate for treatment; a step of forming a photothermal conversion layer on one surface of a supporting substrate having a surface with an outer shape larger than that of the surface of the substrate for treatment; a step of bonding the substrate for treatment onto the surface of the photothermal conversion layer with the adhesive layer interposed, to obtain a layered member; a step of removing, from the layered member, a portion of the photothermal conversion layer that protrudes from the substrate for treatment, and cleaning a portion of the supporting substrate exposed by removal of the photothermal conversion layer; a step of performing, for the layered member after the removal and cleaning, treatment on the surface of the substrate for treatment on the side opposite the surface bonded with the supporting substrate wherein the treatment is performed by grinding, etching, or a combination of grinding and etching, a wet treatment, sputtering, ion implantation, heat treatment, CVD, or patterning; and a step of separating the substrate for treatment after the treatment, from the adhesive layer, by irradiating the photothermal conversion layer with light to perform thermal decomposition of the photothermal conversion layer.