Patent ID: 6429093
Filing Date: 2002-08-06
Classification: H01L

Abstract:
A method of forming a memory device having a conducting line, said method comprising:a) providing a semiconductor substrate with a plurality of memory devices and at least one isolation structure, said plurality of memory devices each having a gate and a source; b) etching a portion of said isolation structure thereby exposing a region of said semiconductor substrate beneath said isolation structure; c) implanting said region of said semiconductor substrate beneath said isolation structure with a first species; d) forming a blanket silicon nitride film with a target thickness of T over said semiconductor substrate wherein said silicon nitride film thickness in regions adjacent to said exposed region of said semiconductor substrate is 30% to 80% of said film target thickness T; e) etching said blanket silicon nitride film to form sidewall structures and remove said silicon nitride film over said semiconductor substrate beneath said isolation structure; and f) forming a silicide on said region of said semiconductor substrate beneath said isolation structure.