Patent ID: 10553552

Abstract:
To provide a wafer laminate which permits easy bonding between a support and a wafer, permits easy delamination of a wafer from a support, enables enhanced productivity of a thin wafer, and is suited to production of a thin wafer, and for a method of producing the wafer laminate.The wafer laminate includes a support, an adhesive layer formed on the support, and a wafer laminated in such a manner that its front surface having a circuit surface faces the adhesive layer. The adhesive layer includes a light-shielding resin layer A and a non-silicone thermoplastic resin-coating resin layer B in this order from the support side. The resin layer A is composed of a resin that contains a repeating unit having a condensed ring, and the resin layer B has a storage elastic modulus E′ at 25° C. of 1 to 500 MPa and a tensile break strength of 5 to 50 MPa.