Junctionless back end of the line via contact
Abstract:
A method of forming an interconnect structure includes providing a first dielectric layer, patterning a wire opening in a first dielectric layer, lining the wire opening with a metal liner and includes filling the wire opening with a first conductive material. The method also includes depositing a first cap on the first dielectric layer, depositing a second dielectric layer, and patterning a via trench in the second dielectric layer. The method also includes depositing a metal liner, removing the metal liner from a via junction, and enlarging the contact area. The method also includes filling the via trench with a second conductive material to form a via.
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