Patent ID: 7828623

Claim:
A substrate processing apparatus for processing a surface of an electron source substrate to be processed, comprising: a hermetic container containing a volume therein, and equipped with an exhaust tube in communication with the volume, the exhaust tube having a gas flowing path inside of the gas exhaust tube and a gas introducing tube having a gas flowing path inside of the gas introducing tube, and capable of setting the surface of the substrate in a hermetic atmosphere; exhaust means which exhausts the gas in the hermetic container through the exhaust tube; and gas introducing means which introduces a gas into the hermetic container through the gas introducing tube, wherein an end portion of the gas introducing tube, from which the gas exits the gas introducing tube to be introduced into the hermetic container, is positioned inside the gas exhaust tube, in the gas flowing path of the gas exhaust tube, without extending into the volume, such that the gas exiting the gas introducing tube and the gas exhausting the hermetic container through the exhaust tube, are inter-mingled inside of the gas exhaust tube.