Vacuum Valve Position Sensing for Leak-Aware Maintenance
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Solution Overview
Problem
Vacuum valves used in semiconductor production face challenges with maintaining gas tightness and reliability due to wear and external influences, leading to frequent maintenance and potential leaks, which results in increased costs and production downtime.
Innovation Solution
Equipping vacuum valves with position sensors to monitor and control the movement of valve components, allowing for continuous position measurement and state verification, enabling early detection of faults and optimizing maintenance schedules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vacuum valves are used without position sensors, then the device complexity is low, but the reliability and maintenance optimization are insufficient
Solution Approach 1:
The patent implements feedback by using position sensors to continuously monitor the actual position of valve components and comparing it with the expected position from control commands. This feedback mechanism enables detection of deviations caused by wear or external influences, allowing for real-time reliability assessment and predictive maintenance, thereby resolving the contradiction between maintaining high reliability and avoiding excessive system complexity.
Solution Approach 2:
The patent replaces traditional mechanical end-position switches with electronic position sensors that provide continuous position measurement. This substitution eliminates the need for narrow mechanical tolerances and complex mechanical switching mechanisms, reducing device complexity while enhancing reliability through more precise and wear-resistant sensing capabilities.
2Reliability
If frequent maintenance is performed based on conventional methods, then potential leaks are prevented, but production downtime and costs increase
Solution Approach 1:
The patent applies preliminary action by continuously monitoring valve component positions and detecting wear or deviations before they lead to gas leaks. The system performs preliminary assessments of valve health status using position data, enabling maintenance to be scheduled only when actually needed rather than following fixed intervals, thus preventing leaks while minimizing production downtime.
Solution Approach 2:
The valve system performs self-service through automated position monitoring and health assessment. The position sensors and control unit continuously evaluate the valve's own condition, determining when maintenance is necessary without external intervention or fixed schedules. This self-monitoring capability enables condition-based maintenance that prevents leaks while optimizing production time utilization.
3Productivity
If position sensors are installed for continuous monitoring, then maintenance can be optimized, but the device complexity increases
Solution Approach 1:
The patent implements universality by designing the position sensor system to serve multiple functions: continuous position measurement, wear detection, maintenance scheduling optimization, and predictive analytics. The same sensor infrastructure supports various monitoring strategies and maintenance approaches, maximizing operational efficiency while justifying the added device complexity through multi-functional benefits.
Data Source
AI summary
Disclosed is a vacuum valve having a valve closure and having a drive unit which is coupled to the valve closure and which has at least one adjustment element. The vacuum valve furthermore has a position sensor, in particular a travel or distance sensor, such that a position of the valve closure and/or of the at least one adjustment element relative to a zero position, in particular an open position or closed position of the vacuum valve, can be measured.