Patent ID: 7304388
Filing Date: 2007-12-04
Classification: H01L

Abstract:
1. An apparatus comprising: a first layer having a first at least one interconnect formed in an interlayer dielectric (ILD); a second layer formed over the first layer, the second layer having a second at least one interconnect, and wherein the second layer comprises a first sublayer and a second sublayer, the first sublayer is between the first layer and the second sublayer, and the second sublayer is between the first sublayer and a third layer, the first sublayer comprising an ILD, and the second sublayer comprising air; the third layer formed over the second layer, the third layer defining at least one air gap between the second at least one interconnect and the third layer; and at least one shunt comprising a first material different from a second material of the first and second at least one interconnects selectively covering the top of the first and second at least one interconnects, wherein the first material has a property that inhibits electromigration of the second material into the second layer or third layer.