Patent ID: 6984565

Claim:
A method for manufacturing a semiconductor device, comprising: forming a first insulating film on a semiconductor substrate; forming a second insulating film on said first insulating film, said second insulating film having a relative permittivity higher than that of said first insulating film; and forming a gate electrode on said second insulating film, wherein forming said second insulating film includes: a first step of supplying a source gas to a film forming apparatus to cause a raw material to be adsorbed on a surface of said first insulating film; a second step of purging the source gas from the film forming apparatus with an inert gas; a third step of supplying an oxidizing gas to said film forming apparatus to oxidize said raw material adsorbed on said surface of said first insulating film; a fourth step of purging the oxidizing gas from the film forming apparatus with an inert gas; a fifth step of generating a reducing gas plasma within said film forming apparatus to produce active species, and causing the active species to react with an unoxidized portion of said raw material adsorbed on said surface of said first insulating film; a sixth step of purging the active species from the film forming apparatus with an inert gas; and repeating the first to sixth steps.