Leak judgment method, and computer-readable recording medium with recorded leak-judgment-executable program
First Claim
1. Method of detecting the occurrence of a leak due to the entry of external air to the interior of a chamber or piping comprising the steps of:
- forming a deposited film from reactive gas in a deposited film-forming apparatus which includes a vacuum pump mounted in an evacuation piping and an exhaust gas treatment unit downstream of the vacuum pump;
measuring temperature in the evacuation piping at a plurality of spots thereof employing a plurality of temperature sensors;
measuring a plurality of temperature values from the temperature sensors; and
detecting a leak of reactant gases based on a temperature change, detected by the temperature sensors, which is caused by reaction between oxygen entering the chamber or the piping and the reactive gas.
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Accused Products
Abstract
In a deposited-film formation apparatus or process having the means or steps of evacuating the inside of an inside-evacuatable chamber through an evacuation piping by an evacuation means, feeding a material gas into the chamber while evacuating the inside of the chamber, and applying a high-frequency power to form a deposited film on a substrate disposed inside the chamber, a leak is detected on the basis of a measured value of a temperature sensor which detects the heat of reaction that is generated when the material gas fed into the chamber reacts with oxygen contained in air having entered from the outside, so as to be able to stop the material gas feeding.
In deposited-film formation apparatus or processes making use of spontaneously ignitable gases, the leak can quickly be detected when air enters the chamber because of any unexpected accident such as a break of piping.
40 Citations
5 Claims
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1. Method of detecting the occurrence of a leak due to the entry of external air to the interior of a chamber or piping comprising the steps of:
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forming a deposited film from reactive gas in a deposited film-forming apparatus which includes a vacuum pump mounted in an evacuation piping and an exhaust gas treatment unit downstream of the vacuum pump; measuring temperature in the evacuation piping at a plurality of spots thereof employing a plurality of temperature sensors; measuring a plurality of temperature values from the temperature sensors; and detecting a leak of reactant gases based on a temperature change, detected by the temperature sensors, which is caused by reaction between oxygen entering the chamber or the piping and the reactive gas. - View Dependent Claims (2, 3, 4, 5)
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Specification