Patent ID: 7187080
Filing Date: 2007-03-06
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a dielectric layer formed over at least a portion of said semiconductor substrate; at least one conductive layer formed in a trench or a via within said dielectric layer, wherein said at least one conductive layer comprises: at least one copper layer containing a dopant; and at least one dopant oxide layer comprising indium oxide formed substantially at the open top surface and at least one dopant layer at the side surfaces of said at least one conductive layer produced when thermally annealing said at least one conductive layer at a predetermined temperature, whereby said dopant diffuses substantially to the top and side surfaces of said at least one conductive layer to form a dopant oxide layer at said top surface and said side surfaces of said at least one copper layer when said at least one conductive layer is thermally annealed at said predetermined temperature and said at least one dopant is exposed to oxygen.