Patent ID: 8043698
Filing Date: 2011-10-25
Classification: C09J,H01L,Y10T

Abstract:
1. A wafer-processing tape, comprising a removable adhesive layer, and an adhesive layer, formed on a substrate film, wherein said tape is used in a process involving the steps of: grinding a hack face of a wafer circuit substrate having convex-type metal electrodes, and dicing the wafer circuit substrate into chips, in a state that said tape is adhered to the wafer circuit substrate; and picking up the chips, in which the chips are picked up in a state that the adhesive layer is peeled from the substrate film but is bonded to the individual chip, wherein the removable adhesive layer is radiation-curable, contains an acryl type copolymer as its principal component and has a gel fraction of 60% or more before being cured by radiation, and wherein the adhesive layer contains at least one resin selected from the group consisting of an acrylic resin, an epoxy resin and a polyimide resin, and has a storage elastic modulus at 80° C. of 0.05 MPa or less.