Stmicroelectronics Gmbh

Jerome Ciavatti

David Moreau

A dielectric layer overlies a semiconductor substrate. The substrate has components and appropriate contacts formed therein. The dielectric layer electrically insulates the substrate and components from overlying conductive interconnect layers. A barrier layer is arranged over the dielectric layer to isolate the interconnect layers from other structures. A copper layer is then deposited over the barrier layer and thick interconnect lines having a first width and a first height are realized. Then, the barrier layer is etched using one of many alternative techniques. The barrier layer has a second width and a second height wherein the second width of the barrier liner is selected to be greater than the first width of the thick copper interconnect.

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Cave Creek, AZ, United States of America

Jerome Ciavatti