Patent ID: 6998293

Claim:
A method of interconnecting an electronic component having an active surface to a substrate, the method comprising: forming at least one solder pad on the active surface of the electronic component; forming at least one bond pad on the substrate wherein the at least one bond pad has a top layer formed of a metal; placing an underfill material on top of the at least one bond pad; moving the electronic component towards the substrate such that the at least one solder pad is aligned on top of the at least one bond pad; heating the electronic component having the at least one solder pad to a first temperature in the range of 220° C. to 260° C.; heating the substrate having the at least one bond pad and the underfill material to a second temperature to soften the underfill material; applying pressure on the electronic component such that the at least one solder pad penetrates the underfill material to contact the top layer of the at least one bond pad to form an electronic assembly; heating the electronic assembly to a predetermined temperature to reflow the at least one solder pad; and forming a metallurgical bond between the at least one solder pad and the top layer of the at least one bond pad.