Plasma Modulation Synchronization to Prevent Aliasing in Process Control
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Solution Overview
Problem
Current plasma processing systems face challenges in controlling complex, interdependent plasma processing equipment due to strong modulation of plasma properties, leading to issues such as aliasing of measurements and improper power control, which are exacerbated by the increasing complexity and precision required in modern plasma processing techniques.
Innovation Solution
A plasma processing system with modulating supplies that modulate plasma properties with a defined repetition period, synchronized through a synchronization module and waveform communication, enabling precise control over plasma properties and equipment synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If modulating supplies are used to control plasma properties, then plasma processing precision is improved, but equipment synchronization complexity increases
Solution Approach 1:
The patent combines multiple independent plasma processing equipment into a synchronized system by integrating waveform communication modules and synchronization modules that share a common repetition period T, enabling coordinated control while maintaining individual equipment functionality
Solution Approach 2:
The synchronization module serves multiple functions: it generates synchronization signals with repetition period T, communicates waveform characteristics between equipment, and coordinates timing across different plasma processing components, reducing overall system complexity
2Manufacturing precision
If equipment synchronization is enhanced for precise plasma control, then manufacturing precision is improved, but system complexity increases
Solution Approach 1:
The patent implements periodic synchronization signals with a defined repetition period T that coordinates all modulating supplies and plasma processing equipment, enabling precise timing control through regular periodic cycles rather than continuous complex control
Solution Approach 2:
The waveform communication module copies and transmits waveform characteristic data between equipment components, allowing synchronized reproduction of plasma modulation patterns across multiple devices without requiring complex real-time control connections
3Manufacturing precision
If plasma properties are strongly modulated for precise processing, then manufacturing precision is improved, but measurement accuracy deteriorates due to aliasing
Solution Approach 1:
The system performs preliminary synchronization of all equipment timing based on the repetition period T before plasma modulation begins, establishing a coherent timing framework that prevents measurement aliasing during subsequent plasma property modulations
Data Source
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AI summary
Plasma processing systems and methods are disclosed. The system may include at least one modulating supply that modulates plasma properties where the modulation of the plasma properties has a repetition period, T. A synchronization module configured to send a synchronization signal with a synchronization-signal-repetition-period that is an integer multiple of T to at least one piece of equipment connected to the plasma processing system. A waveform-communication module communicates characteristics of a characterized waveform to at least one piece of equipment connected to the plasma system to enable synchronization of pieces of equipment connected to the plasma processing system. The characterized waveform may contain information about the modulation of the plasma or information about a desired waveform of a piece of equipment connected to the plasma processing system.