Patent ID: 6265776
Filing Date: 2001-07-24
Classification: H01L

Abstract:
A method for making an integrated circuit assembly for mounting on a circuit board which comprises:a) providing a substrate having a plurality of solderable contact sites on a surface thereof;b) positioning a plurality of solder bumps on the substrate such that each of the solderable contact sites has one solder bump associated therewith;c) affixing each solder bump to its associated contact site;d) applying a flux material to the solder bumps in a manner such that at least a portion of each solder bump is provided with flux; ande) applying an underfill material to the surface of the substrate in a manner such that it occupies a space defamed between each of the solder bumps and is of a depth such that at least a flux covered portion of each solder bump extends therethrough, and wherein steps (a)-(e) are performed prior to mounting the integrated circuit assembly on the circuit board.