Patent ID: 6810897
Filing Date: 2004-11-02
Classification: C03B,C23C,C30B,Y10T

Abstract:
Process gas supply mechanism for ALCVD systems, wherein the ALCVD system is provided with a gastight treatment compartment that holds the treatment substrate and with a vacuum exhaust section that can exhaust said treatment compartment and is connected to the treatment compartment through an exhaust line, and wherein the process gas supply mechanism is connected to the treatment compartment in order to feed process gas into the treatment compartment, said process gas supply mechanism being characteristically provided with a first reactant gas line that can supply a flow rate-regulated first reactant gas; a first auxiliary gas line that can supply a flow rate-regulated first auxiliary gas; a first vent line, which is connected to the first reactant gas line upstream from a first position at which the first reactant gas flow is combined with the first auxiliary gas flow; a first vent setting means that is disposed in the first vent line and that can set the flow rate vf1 of the gas flowing in the first vent line so as to satisfy the condition mf111+mf1 wherein mf1 is the flow rate of the first reactant gas supplied from the first reactant gas line and sf1 is the flow rate of the first auxiliary gas supplied from the first auxiliary gas line; a first vent switching means that is disposed in the first vent line and that can open and close the first vent line; and a first drive control means that drives the first vent switching means in such a manner that the first vent switching means carries out its switching operation repetitively.