Patent ID: 7834454
Filing Date: 2010-11-16
Classification: H01L,H05K

Abstract:
1. An electronic structure comprising: a substrate; a first seed layer on the substrate; a first barrier layer on the first seed layer so that the first seed layer is between the substrate and the first barrier layer; a bump metal on the first barrier layer so that the first barrier layer is between the bump metal and the first seed layer, wherein the first barrier layer defines a lip extending beyond the bump metal so that surface portions of the first barrier layer are exposed adjacent the bump metal along an edge of the first barrier layer; a second seed layer on the substrate, wherein the first and second seed layers comprise a same material and wherein the first and second seed layers are spaced apart; and a second barrier layer on the second seed layer so that the second seed layer is between the substrate and the second barrier layer, wherein the first and second barrier layers comprise a same material, wherein the first and second barrier layers are spaced apart, and wherein the second barrier layer is free of the bump metal.