Patent ID: 7833905
Filing Date: 2010-11-16
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor integrated circuit device, comprising steps of: (a) forming a first insulating film over a semiconductor substrate; (b) forming a mask material over the first insulating film; (c) forming first openings in first portions of the mask material; (d) after the step (c), forming a second opening in a second portion of the mask material, wherein the second portion of the mask material is arranged between first portions of the mask material, such that the second opening and the first openings are formed separately from each other; and (e) after the step (d), removing the first insulating film by using the mask material as a mask, wherein, in the step (e), first trenches are formed in the first insulating film and are positioned at first regions of the first insulating film exposed by the first openings of the mask material, wherein, in the step (e), a second trench is formed in the first insulating film and is positioned at a second region of the first insulating film exposed by the second opening of the mask material.