Vacuum processing apparatus and operating method for vacuum processing apparatus
An operation method for cleaning a vacuum processing apparatus includes feeding a cleaning gas into a film deposition chamber of the vacuum processing apparatus when a predetermined number of batches of film deposition process is finished. The predetermined number of batch of film deposition processes is calculated based on a film deposition-related operating time (a film deposition time and a film deposition preparation time) and a cleaning-related operating time (a cleaning procedure time, a cleaning procedure preparation time, and a pre-deposition film deposition time).
1. An operating method for a vacuum processing apparatus that carries out self-cleaning procedures, at a timing interval, of feeding a cleaning gas into a film deposition chamber in which a film deposition processing is carried out on a substrate, the method comprising:
a step of determining the timing interval between the self-cleaning procedures so as to be in a range in which a film deposition operating time ratio is 80% or more, where the film deposition operating time ratio is a proportion of a film deposition-related operating time in a sum of the film deposition-related operating time and a cleaning-related operating time; and
a step of implementing the self-cleaning procedures at the timing interval determined in the step of determining the timing interval,
wherein the film deposition-related operating time includes a film deposition time and a film deposition preparation time, and
the cleaning-related operating time includes a self-cleaning procedure time, a self-cleaning procedure preparation time, and a pre-deposition film deposition time.
2. The operating method for a vacuum processing apparatus according to claim 1 , wherein the timing interval is determined so as to be in a range in which the film deposition operating time ratio exceeds 90% of a convergence value thereof.
3. The operating method for a vacuum processing apparatus according to claim 1 , further comprising a step of accumulating a heat amount generated during operations of the self-cleaning procedures by using a high heat capacity heat energy reservoir member that is arranged in an interior of the film deposition chamber.
4. The operating method for a vacuum processing apparatus according to claim 1 , further comprising a step of carrying out a pre-deposition film deposition operation that forms a pre-deposition film in the film deposition chamber after the self-cleaning procedures are completed.
5. The operating method for a vacuum processing apparatus according to claim 4 , wherein in the step of carrying out the pre-deposition film deposition operation, a film deposition pressure is equal to or greater than 1.0 times and equal to or less than 1.5 times a film deposition pressure during the film deposition processing, and at least during an initial film deposition period, a radio frequency power supplied to a discharge electrode is equal to or greater than 0.1 times and equal to or less than 1.0 times a radio frequency power supplied during the film deposition processing.
6. The operating method for a vacuum processing apparatus according to claim 4 , further comprising a step of suspending at least one time the pre-deposition film deposition operation and carrying out a high vacuum exhaust step.