Patent ID: 7485494

Claim:
A dicing die adhesive film for semiconductor having a 3-layered structure comprising a first adhesive layer attached to the back of a semiconductor wafer; a second adhesive layer attached onto the first adhesive layer; and a dicing film attached onto the second adhesive layer, and used in conducting a semiconductor packaging process comprising: (a 1 ) a lamination process for attaching the dicing die adhesive film to the back of the semiconductor wafer, (a 2 ) a wafer dicing process for separating a die from die fragments by conducting a cutting operation through the front side of the laminated semiconductor wafer, (a 3 ) a die pick-up process for picking up the die separated by the dicing process so that the first adhesive layer and the second adhesive layer keep attached to the back of the die and the dicing film is separated using a pickup tool, (a 4 ) a die bonding process for attaching the picked-up die to the substrate, and (a 5 ) a curing process for enhancing an adhesive force between the substrate and the die, wherein an interlayer adhesive force (T 1 ) between the semiconductor wafer and the first adhesive layer is maintained at 20 gf/cm or more, and an interlayer adhesive force (T 2 ) between the second adhesive layer and the dicing film is maintained at 3 gf/cm or more after the lamination process (a 1 ); wherein an interlayer adhesive force (Ta 1 ) between the die and the first adhesive layer is maintained at a higher level than an interlayer adhesive force (Ta 2 ) between the second adhesive layer and the dicing film during the die pick-up process (a 3 ); wherein an interlayer adhesive force (Tb 1 ) between the die and the first adhesive layer, and an interlayer adhesive force (Tb 2 ) between the second adhesive layer and the substrate are all maintained at a level greater than 100 gf/cm after the die bonding process (a 4 ); and wherein an interlayer adhesive force (Tc 1 ) between the die and the first adhesive layer, and an interlayer adhesive force (Tc 2 ) between the second adhesive layer and the substrate are all maintained at a level greater than 500 gf/cm after the curing process (a 5 ).