Patent ID: 6372647
Filing Date: 2002-04-16
Classification: H01L

Abstract:
A method of forming a dual damascene pattern in a dielectric layer, comprising the steps of:a) Depositing a layer of a first non-conductive material; b) Depositing a layer of photoresist on a top surface of said layer of said first non-conductive material; c) Exposing said layer of photoresist through a first mask pattern of a set of lines minus the intersection of said set of lines and a set of vias; d) Etching said layer of said first non-conductive material according to the pattern transferred to the photoresist in step c; e) Exposing the layer of photoresist on said top surface through a second mask pattern containing only the intersection of said set of lines and said set of vias, and f) Etching said layer of first non-conductive material according to the pattern transferred to the photoresist in step e.