Patent ID: 7807507

Claim:
A method of forming a semiconductor package, the method comprising: mounting a backgrinding-underfill film which includes a laminated backgrinding film and a laminated underfill film on a semiconductor wafer so that the underfill film adheres to a front side of the semiconductor wafer; backgrinding a back side of the semiconductor wafer on which the backgrinding-underfill film has been mounted; removing the backgrinding film of the backgrinding-underfill film from the semiconductor wafer, wherein the underfill film remains on the semiconductor wafer from which the backgrinding film has been removed; and dicing the semiconductor wafer from which the backgrinding film has been removed and the underfill film remains, so that semiconductor chips are separated from the semiconductor wafer, and wherein the semiconductor wafer comprises through vias to achieve vertical electrical connections between the semiconductor chips.