Patent ID: 7449226

Claim:
A dicing die-bonding film comprising a radiation curable pressure-sensitive adhesive layer on a supporting base material and a die-bonding adhesive layer on the pressure-sensitive adhesive layer, wherein the die-bonding adhesive layer is arranged as a work-attaching region on a part of the pressure-sensitive adhesive layer, the work-attaching region being attached to the whole area of a face of an undiced attached work, wherein the work face is circular, having a diameter m 1 and the work-attaching region is circular having a diameter m 2 , wherein m 2 >m 1 , wherein 0.1 mm≦(m 2 −m 1 ), and wherein 1 inch≦m 1 ≦12 inches, the work-attaching region is designed so as to be held within the inner diameter of a dicing ring stuck on the pressure-sensitive adhesive layer, wherein the dicing ring is circular, having an inner diameter m 3 , wherein m 3 >m 2 , and wherein 5 mm≦(m 3 −m 2 ), wherein the region of the pressure-sensitive adhesive layer, to which the work-attaching region is attached, has been selectively irradiated such that the adhesion of the whole area of the region corresponding to the work-attaching region differs from that of the other region of the pressure-sensitive adhesive layer, and wherein the adhesion of said region of the pressure-sensitive adhesive layer corresponding to the work-attaching region is lower than the adhesion of said other region of the pressure-sensitive adhesive layer.