Patent ID: 6632590
Filing Date: 2003-10-14
Classification: G03F

Abstract:
A method of creating a high density pattern of lines, comprising the steps of:providing a semiconductor surface; forming a layer of conductive material over said semiconductor surface, a high density pattern of lines to be formed using said layer of conductive material, said high density pattern of lines having a first line pitch and a first line width; depositing a layer of photoresist over said layer of conductive material; providing an alternate phase shift mask having opaque lines with a second line pitch that equals said first line pitch, with a second line width that is less than said first line width; using said alternate phase shift mask and photolithographic processes to form a pattern of photoresist comprising lines having a width being equal to said second width; increasing the second width of said lines comprising said pattern of photoresist; and forming a high density pattern of lines in said layer of conductive material using said lines formed in said layer of photoresist as a mask.