Patent ID: 8294269
Filing Date: 2012-10-23
Classification: H01L

Abstract:
1. An electronic structure comprising: a conductive pad on a substrate; an insulating layer on the substrate and on the conductive pad, the insulating layer having a via therein so that a portion of the conductive pad opposite the substrate is free of the insulating layer; a conductive layer comprising copper on the portion of the conductive pad free of the insulating layer, on sidewalls of the via, and on surface portions of the insulating layer surrounding the via opposite the substrate and the conductive pad, wherein the conductive layer comprising copper has a thickness of at least approximately 1.0 μm; a conductive barrier layer on the conductive layer comprising copper wherein the conductive barrier layer comprises at least one of nickel, platinum, palladium, and/or combinations thereof; a solder layer on the conductive barrier layer, wherein the conductive layer comprising copper and the solder layer comprise different materials and wherein the conductive barrier layer is between the conductive layer comprising copper and the solder layer; a primary conductive trace on the substrate so that the primary conductive trace is between the substrate and the insulating layer; and an electrical coupling between the primary conductive trace and the conductive pad, the electrical coupling providing at least two separate current flow paths between the primary conductive trace and the conductive pad.