Evaluating the long-term stability of atmospheric plasma equipment requires comprehensive consideration from multiple dimensions such as materials, design, process, environment, and maintenance, combined with real-time monitoring, simulation testing, historical data, and industry standards for systematic verification. The following are specific evaluation methods and key indicators:
1、 Reliability verification of core components
Corrosion resistance test of materials
Key components such as equipment chambers and electrodes should be made of materials that are resistant to high temperatures and corrosion (such as ceramic coatings, stainless steel 316L)..
Durability assessment of mechanical structures
Electrode wear is a key factor affecting stability. Simulate long-term operation through plasma etching test and monitor electrode loss rate (such as etching depth ≤ 0.01mm per hour). A certain device adopts replaceable electrode modules, and the maintenance cycle is extended to over 3000 hours..
Electrical system stability testing
The power fluctuation of the RF power supply should be controlled within ± 2%. Detect the harmonic content of the power output through power spectrum analysis, requiring total harmonic distortion (THD)<5%.
2、 Long term consistency verification of process parameters
Continuous evaluation of surface treatment effect
Contact angle measurement: The surface contact angle of the processed material should be stable within the target value ± 2 °. For example, after aluminum foil treatment, the contact angle decreased from 78 ° to 22 °, and fluctuated by ≤± 1.5 ° after 1000 hours of operation.
Adhesive strength test: 180 ° peel test (accuracy ± 0.5N/cm) shows that the adhesive strength of the processed polarizer needs to be maintained at over 90% of the initial value.
3、 Maintenance strategy and fault warning mechanism
Preventive maintenance system
Establish a hierarchical maintenance plan:
Daily maintenance: Clean the sediment on the electrode surface and check the sealing of the gas pipeline.
Regular maintenance: Replace the gas filter every 500 hours and calibrate the MFC flow accuracy every 2000 hours.
Deep maintenance: Replace the RF power supply power tube every 10000 hours, and conduct a comprehensive inspection of the electrodes and cavity every 20000 hours.
Life management of vulnerable parts
Track the lifespan of key components, such as plasma nozzles (lifespan ≥ 3000 hours), sealing rings (lifespan ≥ 6 months), etc. Optimize the replacement cycle through a lifespan prediction model (such as Weibull distribution) to avoid process fluctuations caused by component aging.
Through the above systematic evaluation, it can ensure the stable and reliable operation of the equipment in various industries, and solve the surface treatment problems of user products.
