Patent ID: 6528409
Filing Date: 2003-03-04
Classification: H01L

Abstract:
A method for fabricating an interconnect structure within an interconnect opening formed within a porous dielectric material, the method comprising the steps of:A. forming said interconnect opening within a low-K precursor material that is not completely cured; B. filling said interconnect opening with a conductive fill material being contained within said interconnect opening and with a top surface of said conductive fill material within said interconnect opening being exposed; C. forming a capping material on said top surface of said conductive fill material, wherein said capping material is an amorphous alloy or is a microcrystalline alloy having stuffed grain boundaries; and D. performing a thermal curing process for curing said low-K precursor material to become a porous low-K dielectric material after said steps B and C; wherein said capping material on said top surface of said conductive fill material is impervious to at least one of oxygen, carbon, hydrogen, chlorine, and porogen fragments that are generated as out-gassing volatile by-products from said low-K precursor material during said thermal curing process of said step D.