Patent ID: 6744091
Filing Date: 2004-06-01
Classification: H01L

Abstract:
A semiconductor device comprising:a first conductor pattern formed over a semiconductor substrate; a first insulation film formed over the first conductor pattern; a second insulation film, formed of non-doped silicon oxide, formed over the first insulation film, having a substantially flat surface, and having etching characteristics different from those of the first insulation film; a third insulation film formed over the second insulation film, and having etching characteristics different from those of the second insulation film; a fourth insulation film, formed of non-doped silicon oxide, formed over the third insulation film, and having etching characteristics different from those of the third insulation film; an opening formed in the fourth insulation film, the third insulation film, the second insulation film, and the first insulation film, the opening being self-aligned with the first conductor pattern; and a second conductor pattern formed in the opening.