Patent ID: 10385457

Abstract:
In a raw material gas supply apparatus, a remaining amount of the raw material is calculated by subtracting, from an amount of the raw material filled in a new raw material, a cumulative consumption amount including a consumption amount of the raw material calculated based on an actual flow rate of the raw material gas obtained from an offset value, (m3−(m1+m2)), m1, m2 and m3 being respective measurement values of first and second mass controller, and a mass flow meter, obtained by supplying a carrier gas and a dilution gas in a state where the carrier gas flows through a bypass channel, and an actual flow rate measurement value of the raw material obtained by subtracting the offset value from a value of (m3−(m1+m2)) obtained by supplying the carrier gas and dilution gas in a state where the carrier gas flows through the inside of a raw material container.