Patent ID: 6660456
Filing Date: 2003-12-09
Classification: H01L

Abstract:
A method of forming openings on a semiconductor wafer, the method comprising the steps of:depositing an initial film layer over said semiconductor wafer; depositing a first photoresist layer over a surface of said initial film layer; providing an initial image including a first opening in said first photoresist layer using a photolithographic technique; creating said first opening in said initial film layer by transferring said image of said first opening into said initial film layer using an etching procedure; removing said first photoresist layer; depositing a second photoresist layer on said initial film layer; providing another image including a second opening in said second photoresist layer using said photolithographic technique; creating said second opening in said initial film layer by transferring said image including said second opening into said initial film layer using said etching procedure, and positioning said second opening adjacent to and having a predetermined distance from said first opening; removing said second photoresist layer; depositing a final film layer over said initial film layer and said first and second openings such that said final film layer covers a horizontal surface of said initial film layer and covers horizontal and vertical surfaces of said first and second openings; and anisotropically etching said final film layer from said horizontal surfaces of said first and second openings and said horizontal surface of said initial film layer.