Modular Optical Sensor Process Control System with Hierarchical Isolation
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Solution Overview
Problem
Existing semiconductor processing systems lack scalability, isolation, and efficient networking, leading to vulnerabilities and performance issues due to tightly coupled system components and synchronous notifications, which can result in critical interruptions and latency during real-time processing.
Innovation Solution
A modular and adaptable process control system with hierarchically isolated operational controllers that receive optical data from sensors, allowing for autonomous critical function performance and safe distribution of critical function controls, decoupling real-time operations from administrative tasks and reducing external influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If system components are tightly coupled for integrated control, then system integration is improved, but system reliability and resistance to external interference deteriorate
Solution Approach 1:
The control system is segmented into distinct hierarchical levels: upper management controllers for administrative tasks and lower operational controllers for critical real-time functions. This segmentation isolates critical functions from external interference while maintaining system integration through defined communication protocols.
Solution Approach 2:
A hierarchical control architecture acts as an intermediary layer between administrative management functions and critical operational functions. This intermediary structure allows integrated control while protecting critical functions by filtering and managing communication between different system levels.
2Speed
If synchronous notifications are used for real-time monitoring, then response speed is improved, but system latency and interruptions worsen
Solution Approach 1:
The system employs periodic polling and scheduled communication between control levels instead of continuous synchronous notifications. This periodic action reduces processing latency and interruptions while maintaining adequate real-time monitoring capability for critical functions.
Solution Approach 2:
Operational controllers autonomously manage their own critical functions and only communicate with upper management controllers when necessary. This self-service capability eliminates unnecessary synchronous notifications and reduces system latency while maintaining real-time operational control.
3Reliability
If hierarchical isolation is implemented for critical functions, then system reliability is improved, but system complexity worsens
Solution Approach 1:
The control architecture is segmented into standardized hierarchical levels with defined interfaces. This segmentation provides reliability through isolation while managing complexity through modular design principles and standardized communication protocols between levels.
Solution Approach 2:
The hierarchical control structure uses homogeneous communication protocols and standardized interfaces between different levels. This homogeneity reduces architectural complexity despite the presence of multiple isolation layers, making the system easier to implement and maintain.
Data Source
AI summary
A method of operating a process control system and a process control system are provided by the disclosure. In one embodiment, the process control system includes: (1) an optical sensor configured to monitor a production process within a process chamber and generate optical data therefrom, (2) an operational controller configured to perform critical functions to determine processing conditions of the production process from the optical data, wherein the critical functions are directed by critical function controls, (3) an adaptable management controller configured to provide the critical function controls to the operational controller, wherein the adaptable management controller is hierarchically isolated from the operational controller during the critical functions.