Patent ID: 7358158

Claim:
A method of using a wafer processing adhesive tape which comprises: adhering a wafer processing adhesive tape to a wafer under a load at a temperature of 20 to 80° C., said wafer processing adhesive tape comprising an adhesive layer on one side of a substrate layer wherein the storage modulus G′ of the adhesive layer at a temperature of 15 to 35° C. is 1 MPa or more and wherein the adhesive layer comprises at least one type of α-olefin copolymer comprising at least two α-olefins having 2 to 12 carbon atoms as a principal component; cutting the wafer into chips at a temperature of 15 to 35° C.; stretching said wafer processing tape at a temperature of 40 to 80° C.; and thereupon peeling the chips from said wafer processing adhesive tape at room temperature.