Patent ID: 6489681
Filing Date: 2002-12-03
Classification: H01L,H05K

Abstract:
A printed circuit board including at least one conductive bump comprised of a freestanding viscous adhesive material, the at least one conductive bump exhibiting a height-to-width ratio of at least approximately 3 to 1 and including a first surface adjacent said printed circuit board and a second surface opposite said first surface exhibiting a generally planar portion over a substantial portion thereof, said printed circuit board including said at least one conductive bump formed by:providing said printed circuit board with at least one bond pad; dispensing a viscous conductive material on said printed circuit board to substantially define at least one conductive bump exhibiting a height-to-width ratio of at least approximately 3 to 1, said at least one conductive bump in electrical communication with said at least one bond pad and including a first surface adjacent said at least one bond pad and a second surface opposite said first surface exhibiting a generally planar portion; and inverting said printed circuit board without effecting substantial lateral confinement of said viscous conductive material and maintaining said printed circuit board in an inverted position at least until said viscous conductive material substantially stabilizes so as to exhibit a desired stable shape and lateral boundary substantially defining sizes of said first and second surfaces of said at least one conductive bump and wherein a substantial portion of said second surface of said at least one conductive bump exhibits a generally planar configuration.