Vacuum Valve Feedback Control for Synchronized Process Pressure
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Solution Overview
Problem
Existing vacuum processing systems face challenges in efficiently and reliably controlling pressure and gas flow in semiconductor production, leading to delays and reduced production quality due to decentralized coordination and lack of real-time feedback.
Innovation Solution
A centralized control and regulation unit that synchronizes the vacuum valve with other processing components, such as gas inlet valves and plasma generators, to optimize pressure regulation and gas flow, using feedback loops to adjust processes in real-time and adapt to deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If decentralized coordination is used for controlling vacuum valves and processing components, then device complexity is reduced, but productivity decreases due to delays and lack of synchronization
Solution Approach 1:
The patent combines multiple decentralized control functions into a single centralized control unit that coordinates vacuum valves, gas inlet valves, and plasma generators. This merging of control functions eliminates delays caused by decentralized coordination while maintaining manageable system complexity through integrated control logic.
Solution Approach 2:
The control unit implements feedback loops that continuously monitor pressure, gas flow, and plasma generation status, then automatically adjust valve positions and process parameters. This real-time feedback synchronization improves productivity by eliminating waiting delays and ensuring coordinated operation of all processing components.
2Manufacturing precision
If real-time feedback control is implemented for pressure regulation, then manufacturing precision improves, but device complexity increases due to additional sensors and control loops
Solution Approach 1:
The control unit performs multiple functions including pressure regulation, gas flow control, plasma generation coordination, and process timing synchronization. By consolidating these diverse control functions into a single multi-functional unit, the patent achieves high manufacturing precision without proportionally increasing device complexity.
Solution Approach 2:
Pressure sensors provide real-time feedback to the control unit, which automatically adjusts vacuum valve positions to maintain target pressure. This closed-loop feedback control achieves precise pressure regulation while the integrated control unit manages the complexity of multiple control loops through unified control logic.
3Productivity
If centralized control synchronizes all processing components, then productivity increases through reduced delays, but device complexity increases due to coordination requirements
Solution Approach 1:
The control unit pre-coordinates valve opening/closing sequences and plasma generation timing before processing steps begin. By planning and synchronizing all component actions in advance, the system achieves high productivity through eliminated delays while managing complexity through structured sequencing logic rather than continuous complex coordination.
4Manufacturing precision
If multiple regulation loops are used for precise process control, then manufacturing precision improves, but ease of operation decreases due to complex control parameters
Solution Approach 1:
The control unit automatically adjusts vacuum valve positions, gas flow rates, and plasma generation parameters based on real-time sensor feedback without requiring manual intervention. The system self-regulates multiple process parameters simultaneously, achieving high manufacturing precision while maintaining ease of operation through automated control rather than manual parameter adjustment.
Data Source
AI summary
The invention relates to a vacuum process system for an evacuable vacuum process volume, a vacuum valve, a peripheral unit having a closed-loop and open-loop control unit. The vacuum valve includes a valve seat, with a valve opening and a first sealing surface; a valve closure, with a second sealing surface and a drive unit coupled to the valve closure. The valve closure can be varied to provide different valve opening states. The closed-loop and open-loop control unit can perform multiple execution of a process cycle with control of the peripheral unit at least in part to execute a control cycle providing a deliberate variation or setting of the valve opening state by controlling the drive unit on the basis of a currently determined controlled variable for a process parameter and on the basis of a target variable and can be performed with a certain temporal relation.