Patent ID: 6620247
Filing Date: 2003-09-16
Classification: C23C,H01L,Y02E,Y02P

Abstract:
A thin film forming apparatus of a plasma CVD type including a film deposition chamber for accommodating a deposition target substrate; a discharging electrode for plasma formation in said deposition chamber connected to a discharging power source; a gas supply device for supplying a gas for film deposition into said deposition chamber; and an exhaust device for exhausting a gas from said deposition chamber, wherein further included are an emission-spectrometer and a probe measuring device for measuring the plasma state, and a control portion for controlling at least one of the power supply from said discharging power source, the gas supply from said gas supply device and exhausting by said exhaust device, for maintaining a predetermined plasma state based on information detected at said emission-spectrometer and said probe measuring device.