Patent ID: 6410384
Filing Date: 2002-06-25
Classification: H01L

Abstract:
A method for manufacturing a conductive strip for integrated circuits, said method comprising the steps of:forming a trench into a substrate; conformally forming a doped dielectric layer along a surface of said etched substrate; conformably forming an ion-implanted-sensitive resist lying over said doped dielectric layer; performing an anisotropical implantation to implant ions into a horizontal portion of said ion-implanted-sensitive resist, thereby generating horizontal insoluble portions and vertical soluble portions; removing said vertical soluble portions to expose said doped dielectric layer attached on side walls of said trench; removing said doped dielectric layer attached on said side walls of said trench; removing said horizontal insoluble portions of said ion-implanted-sensitive resist; removing said doped dielectric layer on an upper surface of said substrate; and performing a thermal treatment to diffuse dopants in said doped dielectric layer into said substrate under said trench, thereby forming a conductive region.