Dielectric Window Gas Conditioning for Stable Plasma Processing
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Solution Overview
Problem
Temperature variations in plasma generation systems cause variations in plasma process parameters, leading to inconsistent plasma processing results and poor wafer-to-wafer reproducibility in semiconductor manufacturing.
Innovation Solution
A temperature-controlled plasma generation system with gas distribution elements that distribute thermally conditioned gas on a dielectric window to regulate and maintain uniform temperature, reducing temperature variations by up to 95% and ensuring consistent plasma process parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plasma generation is performed without temperature control, then plasma processing can be carried out simply, but temperature variations cause inconsistent plasma process parameters and poor wafer-to-wafer reproducibility
Solution Approach 1:
The gas distribution elements are pre-configured with multiple gas inlet ports and internal flow channels that distribute thermally conditioned gas across the dielectric window surface before plasma generation begins. This preliminary temperature uniformity preparation prevents temperature variations during plasma processing, ensuring consistent plasma parameters and improved wafer-to-wafer reproducibility without requiring complex real-time temperature control systems
Solution Approach 2:
Thermally conditioned gas acts as an intermediary substance that transfers thermal energy uniformly across the dielectric window through the gas distribution elements. The gas flows through controlled pathways and exits via multiple outlets to create uniform temperature distribution, mediating between the temperature control system and the plasma generation process to eliminate temperature-induced parameter variations
2Manufacturing precision
If temperature is regulated across the dielectric window, then plasma process parameters remain consistent, but additional gas distribution elements and thermal conditioning systems are required
Solution Approach 1:
The gas distribution system is segmented into multiple independent gas distribution elements, each with its own inlet ports and flow channels. These elements are distributed across different regions of the dielectric window, allowing independent control and optimization of gas flow to each zone. This segmentation enables precise temperature regulation across the entire window area while maintaining modular simplicity in each individual element
Solution Approach 2:
The gas distribution elements serve multiple functions simultaneously: they distribute thermally conditioned gas across the dielectric window, provide structural support for temperature uniformity, and act as flow control mechanisms. This multi-functionality reduces the need for separate dedicated components, simplifying the overall system while achieving precise plasma process parameter consistency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves stable plasma process parameters and improved wafer-to-wafer reproducibility by maintaining dielectric window temperature uniformity, thereby enhancing manufacturing consistency and yield.
Implementation Method 1
A temperature-controlled plasma generation system with gas distribution elements that distribute thermally conditioned gas on a dielectric window to regulate and maintain uniform temperature
Implementation Method 2
A plasma generation system includes a processing chamber, a dielectric window positioned on the processing chamber, a gas distribution element disposed on the dielectric window
Data Source
AI summary
The present disclosure relates to a plasma generation system with a dielectric window, an inductive coil disposed on the dielectric window, a gas distribution element disposed on the dielectric window, and a gas conditioning system coupled to the gas distribution element. The gas distribution element is configured to discharge a thermally conditioned gas on the dielectric window and regulate a temperature across the dielectric window. The gas conditioning system is configured to supply the thermally conditioned gas to the gas distribution element.