Patent ID: 6897563
Filing Date: 2005-05-24
Classification: H01L

Abstract:
1. A bump and vias structure, comprising: a metal layer; a bump mounted on a landing pad portion of the metal layer; a first plurality of vias connected to a first outer region of the metal layer, wherein the first outer region is connected to a first density of vias; and a second plurality of vias connected to a second outer region of the metal layer, wherein the second outer region is connected to a second density of vias, wherein the first density and second density are greater than a third density of vias connected to a central region between the first and second outer regions, and wherein an area of the metal layer linearly extending from an edge of the metal layer to another edge of the metal layer is laterally disposed between the landing pad portion and both the first plurality of vias and the second plurality of vias, and wherein there is an absence of vias between the area and the bump.