Patent ID: 8137791
Filing Date: 2012-03-20
Classification: H01L,Y10T

Abstract:
1. A structure, comprising: a substrate that comprises a first dielectric layer that includes a first dielectric material; at least one copper wire, each copper wire within the first dielectric layer and extending above the first dielectric layer by a recess depth, wherein each copper wire comprises copper; a recess having the recess depth from the top surface of each copper wire to a top surface of the first dielectric layer such that the recess surrounds and is in direct mechanical contact with a perimeter surface of each copper wire, wherein the recess depth is less than a thickness of each copper wire in a direction perpendicular to the top surface of each copper wire; a capping layer in the recess and on the top surface of each copper wire and on the top surface of the first dielectric layer; a second dielectric layer comprising one or more dielectric sublayers on and in direct mechanical contact with the capping layer, wherein each dielectric sublayer comprises a dielectric material that is specific to each dielectric sublayer, wherein the capping layer comprises a capping material configured to prevent copper of each copper wire from passing through the capping layer into the second dielectric layer; wherein the recess depth has a magnitude sufficient to prevent a lateral fail of the capping layer during packaging and/or operation of the substrate; wherein the lateral fail comprises a delamination of a portion of the capping layer from the first dielectric layer; wherein the delamination is characterized by an angular gap comprising an acute angle exceeding zero degrees between the capping layer and the top surface of the first dielectric layer; wherein the recess depth is not constant around the perimeter surface of a first copper wire of the at least one copper wire.