Substrate processing apparatus and method of manufacturing semiconductor device
View Patent ↗Provided are a substrate processing apparatus and a method of manufacturing a semiconductor device, in which shape variations of discharge electrodes can be early detected so as to prevent a film having a non-uniform thickness from being formed on a substrate. The substrate processing apparatus includes a process chamber configured to stack a plurality of substrates therein, a gas supply unit configured to supply gas to an inside of the process chamber, at least one pair of electrodes installed in the process chamber and configured to receive high-frequency power to generate plasma that excites the gas supplied to the inside of the process chamber, and a monitoring system configured to monitor a shape variation of the electrodes.
1. A substrate processing apparatus comprising:
a process chamber configured to stack a plurality of substrates therein;
a gas supply unit configured to supply a gas into the process chamber;
at least one pair of electrodes installed in the process chamber and configured to receive high-frequency power to generate plasma that excites the gas supplied into the process chamber; and
a monitoring system configured to monitor a variation of a resonance frequency of the at least one pair of electrodes and a shape variation of the at least one pair of electrodes.
2. The substrate processing apparatus of claim 1 , further comprising:
an absorption frequency meter.
3. A substrate processing apparatus comprising:
a process chamber configured to stack a plurality of substrates therein;
a gas supply unit configured to supply a gas into an inside of the process chamber;
at least one pair of electrodes installed in the process chamber and configured to receive high-frequency power to generate plasma that excites the gas supplied into the inside of the process chamber; and
a monitoring system configured to monitor a shape variation of the at least one pair of electrodes,
wherein the shape variation of the at least one pair of electrodes is a length variation of the at least one pair of electrodes.
4. A substrate processing apparatus comprising:
a process chamber configured to stack a plurality of substrates therein;
a gas supply unit configured to supply a gas into the process chamber;
at least one pair of electrodes installed in the process chamber and configured to receive high-frequency power to generate plasma that excites the gas supplied to the inside of the process chamber;
an absorption frequency meter configured to measure an absorption frequency at the at least one pair of electrodes;
a comparison unit configured to compare a first frequency measured by the absorption frequency meter with a preset threshold value;
an output unit configured to generate an alarm signal; and
a control unit,
wherein if the first frequency is greater than the threshold value, the control unit controls the comparison unit and the output unit so as to generate an alarm signal.
5. A method of manufacturing a semiconductor device by forming a film on a plurality of substrates stacked in a process chamber, the method comprising:
loading the plurality of substrates in the process chamber;
forming the film on the plurality of substrates by applying high-frequency power to a pair of electrodes installed in the process chamber to excite a process gas introduced into the process chamber;
unloading the plurality of substrates from the process chamber; and
monitoring a shape variation of the pair of electrodes by using a monitoring system.
6. The method of claim 5 , wherein the monitoring system is configured to monitor a variation of a resonance frequency of the pair of electrodes.
7. The method of claim 5 , wherein the shape variation of the pair of electrodes is a length variation of the pair of electrodes.