Multi-Frequency RF Generator for Fast Power Regulation
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Solution Overview
Problem
Existing radio-frequency (RF) generator systems for plasma processing require multiple standalone generators to control multiple frequencies, leading to increased costs, communication latency, and inefficiencies in synchronizing signals, particularly in high-frequency applications where fast feedback is necessary to manage arc events or other faults.
Innovation Solution
A single RF generator with a power amplifier module, pickup module, and a controller that generates multiple carrier signals of different frequencies, allowing for efficient power regulation and synchronization of RF output signals, reducing the need for duplicate AC circuits and external communication interfaces, and enabling faster fault response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple standalone RF generators are used to control multiple frequencies, then frequency control capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple RF signal generation capabilities into a single integrated RF generator. The device includes a controller that can generate multiple RF signals at different frequencies and a power amplifier that can amplify these signals simultaneously, eliminating the need for multiple separate RF generators while maintaining the ability to control multiple frequencies.
Solution Approach 2:
The RF generator is designed with multi-functionality to perform multiple tasks through a single device. The controller can independently control multiple RF output channels, each capable of operating at different frequencies, while sharing common power supply and control resources. This universal design allows the single generator to replace multiple specialized generators.
2Adaptability or versatility
If multiple standalone RF generators are used, then frequency control capability is improved, but communication latency increases
Solution Approach 1:
By merging multiple RF signal generation functions into a single controller, the patent eliminates the need for inter-generator communication protocols. The controller directly generates and coordinates multiple RF signals without requiring external communication interfaces, thereby reducing communication latency and improving real-time control capability.
3Adaptability or versatility
If multiple standalone RF generators are used, then frequency control capability is improved, but synchronization efficiency deteriorates
Solution Approach 1:
The patent merges multiple RF signal generation functions into a single controller that can independently control multiple output channels. This internal integration allows for direct and immediate synchronization of multiple RF signals without requiring external coordination protocols, thereby improving synchronization efficiency and overall system productivity.
4Device complexity
If a single RF generator is used to manage multiple frequencies, then device complexity is reduced, but signal control accuracy may worsen
Solution Approach 1:
The patent applies segmentation by dividing the RF signal generation and control functions into distinct modular components within the single generator. The controller includes separate signal generation circuits and independent control channels for each RF output, allowing precise control of multiple frequencies while maintaining a compact integrated structure. This segmentation enables high signal control accuracy without increasing overall system complexity.
Data Source
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AI summary
A radio-frequency generator (40) is described, comprising a power amplifier module (41) comprising at least one power amplifier (42), at least one pickup module (44) connected to an output of the at least one power amplifier to generate at least one pickup signal, and at least one output (RFOUT1) configured to be connected to the respective output of the at least one amplifier and configured to output at least one radio-frequency output signal. The radio-frequency generator comprises a measurement module (50) configured to receive the at least one pickup signal and to generate at least one measurement signal (52) based on the at least one pickup signal; and a radio-frequency signal generation module (48) configured to generate two or more carrier signals of different frequency, and to provide at least one drive signal as input to the power amplifier module, and a regulation module (54) configured to receive the at least one measurement signal, and to regulate the power of the at least one radio-frequency output signal based on the at least one measurement signal.