Patent ID: 6236105
Filing Date: 2001-05-22
Classification: H01L

Abstract:
A semiconductor device comprising:an interlayer insulating film disposed between upper and lower wiring layers,said interlayer insulating film having a two-layered structure including an upper insulating film and a lower insulating film,said upper and lower insulating films each being formed from an O.sub.3 tetra etyl ortho silicate (TEOS) reaction, said upper insulating film formed in an atmosphere containing ozone (O.sub.3) at a concentration higher than in an atmosphere in which said lower insulating film is formed,said upper and lower insulating films containing an impurity therein,said upper insulating film containing said impurity at a concentration higher than that of said lower insulating film,wherein said upper insulating film includes a surface having a reduced concentration of impurity particles as a result of said upper insulating film having been formed in said atmosphere containing a greater concentration of ozone than in said atmosphere in which said lower insulating film was formed.