Abstract: A method for preparing a semiconductor with preapplied underfill comprises (a) providing a thinned silicon semiconductor wafer having a plurality of metallic bumps on its active face and, optionally, through-silica-vias vertically through the silicon semiconductor wafer; (b) providing an underfill material on a dicing support tape, in which the underfill material is precut to the shape of the semiconductor wafer; (c) aligning the underfill material on the dicing support tape with the semiconductor wafer and laminating the underfill material to the semiconductor wafer.

Abstract: A method for preparing a semiconductor with preapplied underfill comprises providing a semiconductor wafer with a plurality of metallic bumps on its top side and, optionally, through-silica-vias vertically through the silicon wafer; laminating a back grinding tape to the top of the wafer covering the metallic bumps and through silicon vias; thinning the back side of the wafer; mounting a dicing tape to the back side of the thinned wafer and mounting the silicon wafer and dicing tape to a dicing frame; removing the back grinding tape; providing an underfill material precut into the shape of the wafer; aligning the underfill on with the wafer and laminating the underfill to the wafer.