Patent ID: 10340172

Abstract:
This semiconductor wafer surface protection film has a substrate layer A, an adhesive absorption layer B, and adhesive surface layer C, in the stated order. The adhesive absorption layer B comprises an adhesive composition containing a thermoset resin b1, said adhesive absorption layer B having a minimum value G′bmin of the storage elastic modulus G′b in the range of 25° C. to less than 250° C. of 0.001 MPa to less than 0.1 MPa, a storage elastic modulus G′b250 at 250° C. of 0.005 MPa or above, and a temperature at which G′bmin is exhibited of 50-150° C. The adhesive surface layer C has a minimum value G′cmin of the storage elastic modulus G′c in the range of 25° C. to less than 250° C. of 0.03 MPa.