Patent ID: 7999395
Filing Date: 2011-08-16
Classification: H01L,H05K,Y02P

Abstract:
1. An apparatus comprising: a substrate configured to receive a chip; a conductive pad formed on the substrate, the conductive pad to receive a spherical bump, the conductive pad including: a solder mask coupled to the substrate, the solder mask having a height above the substrate that is lower than a height of the pillar portion above the substrate, wherein the solder mask is coupled to the base portion of the conductive pad such that the solder mask covers at least a portion of the base portion, wherein the solder mask is disposed on a surface of the base portion, the surface being substantially parallel to a surface of the substrate upon which the conductive pad is formed, wherein the base portion has a width that is greater than a width of the pillar portion, wherein the pillar portion and the base portion are each part of a single continuous structure that is both structurally continuous and materially continuous, the single continuous structure not including a wire-bond structure, and wherein the single continuous structure is consistent with the pillar portion and the base portion being simultaneously formed by etching a conductive material.