Patent ID: 7166185

Claim:
An insulation film forming system comprising: an oxide film forming unit for forming a silicon oxide film on a surface region of a silicon substrate; a nitride film forming unit for forming a silicon nitride film on a surface region of said silicon oxide film; and a permittivity film forming unit for forming a permittivity film of a higher permittivity, than the silicon oxide film, on said silicon nitride film; wherein: said oxide film forming unit forms the silicon oxide film on the surface region of said silicon substrate, by exposing the surface of said silicon substrate to a plasma, generated by irradiating microwave from a plane antenna ( 62 ) having plural slits, to an oxygen containing gas; and said nitride film forming unit forms the silicon nitride film on the surface region of said silicon oxide film, by exposing the surface of said silicon oxide film to a plasma, generated by irradiating microwave from a plane antenna of said silicon nitride film forming unit having plural slits, to a nitrogen containing gas.