Patent ID: 9368466
Filing Date: 2016-06-14
CPC Classification: H01L

Claim Text:
1. A bump contact comprising: an electrically conductive pillar constructed on a conductor that is located on a substrate, the conductive pillar having first and second ends, the first end of the pillar being in direct contact with a contact pad of a semiconductor device, the pillar projecting outwardly from the substrate; a solder crown having first and second extreme ends, the solder crown being positioned in axial alignment with the pillar with the first end of the solder crown facing the second end of the pillar, the solder crown being reflowable at a predetermined temperature into effecting electrical contact and mechanical attachment by the second end thereof with the conductor on the substrate; and a diffusion barrier electrically and mechanically joining the first end of the solder crown to the second end of the pillar, the diffusion barrier resisting electro-migration into the first end of the solder crown by a selected chemical constituent of the pillar.