Plasma Processing Maintenance Planning Using Degradation Score Prediction
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Solution Overview
Problem
Existing plasma processing apparatus diagnostics fail to provide a comprehensive maintenance plan that considers degradation scores, maintenance costs, and unplanned maintenance predictions, leading to inefficient operation and increased downtime.
Innovation Solution
An apparatus diagnostic apparatus that estimates degradation scores based on sensor data, predicts unplanned maintenance, and calculates maintenance costs to optimize the maintenance plan by incorporating unplanned work into planned maintenance, minimizing overall costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unplanned maintenance is performed immediately after alarm, then component reliability is improved, but apparatus productivity deteriorates due to extended downtime
Solution Approach 1:
The system performs preliminary actions by predicting unplanned maintenance needs in advance using degradation score estimation from sensor data, and proactively incorporating these maintenance tasks into scheduled maintenance plans before alarms occur, thereby preventing unexpected downtime while maintaining productivity
Solution Approach 2:
The maintenance plan is made dynamic by continuously updating it based on real-time degradation score estimates and predicted unplanned maintenance needs, allowing the system to adaptively adjust maintenance timing and resource allocation to balance reliability and productivity
2Measurement precision
If comprehensive maintenance monitoring is implemented, then maintenance precision is improved, but device complexity increases due to multiple sensors and processing units
Solution Approach 1:
The apparatus diagnostic apparatus performs multiple functions including degradation score estimation, unplanned maintenance prediction, and maintenance plan correction using a unified system architecture, reducing overall device complexity while maintaining comprehensive monitoring capabilities
Solution Approach 2:
The system introduces an intermediary maintenance plan correction unit that integrates information from sensor data and degradation scores to coordinate between monitoring components and maintenance execution, simplifying the overall system architecture while improving maintenance precision
Data Source
AI summary
In a plasma processing apparatus, occurrence of unplanned maintenance is predicted in advance so that a time when the work should be incorporated into planned maintenance can be determined. An apparatus diagnostic apparatus including a degradation score estimation unit that receives an output of a sensor mounted on a plasma processing apparatus and estimates a degradation score of the plasma processing device; a maintenance work occurrence probability estimation unit that calculates a probability of occurrence of an unplanned maintenance work that is not included in an original maintenance plan based on the degradation score; an actual maintenance cost calculation unit that calculates an actual maintenance cost; and a plan incorporated maintenance cost calculation unit that outputs a correction plan of maintenance plan in which the original maintenance plan is corrected by incorporating the unplanned maintenance work based on the probability of occurrence of the unplanned maintenance work.