Patent ID: 7550314

Claim:
A method of providing an underfill material between a chip and a substrate, comprising: providing a chip mask having a pattern formed therein; placing the chip mask over the chip; performing a plasma treatment through the pattern formed in the chip mask onto a first side of the chip to form a plasma treated area on the first side of the chip, wherein the plasma treated area on the chip has a shape corresponding to the chip mask pattern, the treated area having a wide edge near the edge of the chip and a narrower edge near an opposite edge of the chip, and wherein the plasma treated area is smaller than the first side of the chip; electrically connecting the chip to the substrate, wherein a gap remains between the chip and the substrate and wherein the first side of the chip faces the substrate; and dispensing the underfill material on the substrate at a location where the underfill material will be drawn into the gap by a capillary action.