Patent ID: 6150272
Filing Date: 2000-11-21
Classification: H01L

Abstract:
A method for making recessed patterned metal structures in an insulating layer by chemical/mechanical polishing comprising the steps of:providing a semiconductor substrate having semiconductor devices;forming a planar insulating layer composed of silicon oxide on said substrate;depositing an organic protective layer on said insulating layer;etching recesses in said organic protective layer and in said insulating layer;depositing a conformal barrier/adhesion layer on said organic protective layer and in said recesses;depositing a metal layer sufficiently thick to fill said recesses and to form an essentially planar surface;chemically/mechanically polishing back said metal layer and said barrier layer to said organic protective layer, wherein said organic protective layer protects said insulating layer from polishing-induced defects;removing selectively said organic protective layer to said insulating layer to complete said patterned metal structures, coplanar with top surface of said insulating layer.