Patent ID: 6352881
Filing Date: 2002-03-05
Classification: H01L

Abstract:
A wafer level method for forming a layer of underfill adhesive on integrated circuits formed on an active surface of a wafer having electrically conductive pads, the method comprising:forming solder bumps on a plurality of the electrically conductive pads; forming an underfill adhesive layer on the active surface of the wafer by, masking selected portions of the active surface of the wafer, and depositing the underfill adhesive on the active surface of the wafer such that the masked portions of the active surface correspond to uncovered portions of the active surface that are not covered by the underfill adhesive; and partially curing the underfill adhesive layer, wherein some of the uncovered portions provide a mechanism for relieving thermally induced stress in the wafer caused in part by the partial curing, and wherein the masked portions of the active surface of the wafer include most of a plurality of saw streets that isolate adjacent integrated circuits.