Patent ID: 6790473
Filing Date: 2004-09-14
Classification: H01L,H05K

Abstract:
A method, comprising the steps of:providing a substrate including a surface thereon having a plurality of electrical conductors positioned on the surface; providing an integrated circuit chip located above the surface of the substrate to form a gap between a bottom side of the chip and said surface of the substrate, wherein a plurality of conductive leads project from lateral sides of said integrated curcuit chip, said lateral sides not including said bottom side; forming a solder joint for electrically connecting each conductor with the conductor's respective lead; forming a composition that includes a photoinitiator, a dispersed phase of particulate silica, and a resin precursor, wherein the resin precursor consists essentially of a cyanate ester monomer, a cyanate ester propolymer, or a mixture of the monomer and prepolymer; applying an amount of the composition at a thickness sufficient to cover substantially all of the solder joint; and photocuring the composition to reinforce the solder joint, wherein photocuring the composition forms a resin in the composition from the precursor.