Patent ID: 7176121
Filing Date: 2007-02-13
Classification: H01L

Abstract:
1. A manufacturing method of a semiconductor device, comprising the steps of: (a) forming a first wiring over a semiconductor substrate; (b) forming a first SiC film on said first wiring; (c) forming a first SiOC film on said first SiC film; (d) forming a second SiC film on said first SiOC film; (e) etching said SiC film using a first photoresist film having an opening of hole shape as a mask; (f) forming a second SiOC film on said first SOC film and said second SiC film; (g) etching said second SiOC film using a second photoresist film having an opening of trench shape as a mask, thereby forming a wiring trench in said second SiOC film; (h) etching said first SiOC film using said second photoresist film and said second SiC film as masks, thereby forming a connection hole in said first SiOC film; (i) forming a conductive film on said second SiOC film and in said wiring trench and said connection hole; and (j) polishing said conductive film by CMP, thereby forming a second wiring including portions of said conductive film inside said wiring trench and said connection hole.