Patent ID: 8772160

Claim:
A method for manufacturing a semiconductor element comprising the steps of: transferring a substrate into a load lock chamber; evacuating the load lock chamber to have a pressure of 10 −6 Pa or less; transferring the substrate into a heating chamber evacuated to have a pressure of 10 −8 Pa or less; performing a heat treatment on the substrate after evacuating the heating chamber to have the pressure of 10 −8 Pa or less; transferring the substrate into a first deposition chamber evacuated to have a pressure of 10 −8 Pa or less; introducing a first gas into the first deposition chamber; forming a gate insulating film over the substrate; evacuating the first deposition chamber to have a pressure of 10 −8 Pa or less; transferring the substrate into a second deposition chamber evacuated to have a pressure of 10 −8 Pa or less; introducing a second gas into the second deposition chamber; forming an oxide semiconductor film over the gate insulating film; and evacuating the second deposition chamber to have a pressure of 10 −8 Pa or less after forming the oxide semiconductor film.