Patent ID: 7081404

Claim:
A method of bumping a substrate including a metal layer thereon wherein the metal layer has an exposed portion, the method comprising: forming a barrier layer comprising a barrier layer material on the substrate and on the exposed portion of the metal layer; forming a conductive bump comprising a conductive bump material on the barrier layer wherein the barrier layer is between the conductive bump and the substrate and wherein the conductive bump is laterally offset and laterally separated from the exposed portion of the metal layer in a direction parallel to a surface of the substrate so that the exposed portion of metal layer is free of the conductive bump material; and after forming the conductive bump, removing the barrier layer from the exposed portion of the metal layer while maintaining a portion of the barrier layer between the conductive bump and the substrate so that the portion of the barrier layer maintained between the conductive bump and the substrate is laterally offset and laterally separated from the exposed portion of the metal layer in the direction parallel to the surface of the substrate and so that the exposed portion of the metal layer is free of the barrier layer material.