Patent ID: 6420084
Filing Date: 2002-07-16
Classification: G03F

Abstract:
A method of making a patterned metal layer, said metal being selected from the group consisting of Cr, Cu, Al, and alloys thereof on a substrate, said method comprising:(a) providing a substrate having metal layer thereon, (b) providing a layer of positive resist over said metal layer, said radiation-sensitive resist comprising a polymeric component, at least a portion of said polymeric component containing SiO moieties, at least a portion of said polymeric component containing pendant acid labile moieties which inhibit solubility of the resist in aqueous alkaline solutions, and at least a portion of said polymeric component containing pendant polar moieties which promote alkaline solubility of said resist in aqueous alkaline solutions, (c) patternwise exposing portions of said resist to imaging radiation, (d) removing said exposed portions of said resist to form spaces defined by remaining unexposed portions of said resist layer, (e) removing portions of said metal layer at said spaces by contacting said material layer with an etchant compound comprising a halogen atom selected from the group consisting of CI, Br, and I, and (f) removing any remaining portions of said resist layer.