Adjustable Side Gas Plenum for Edge Rate Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Substrate processing systems face challenges in achieving uniform gas distribution over substrates, particularly at the outer edges, leading to variations in etch rates and efficiency due to fixed faceplates that require frequent changes, resulting in increased maintenance and productivity losses.
Innovation Solution
The implementation of a side tuning ring system with detachable rings and plenums adjacent to the faceplate of the gas distribution device, allowing for independent control and direction of process gases at different angles and flow rates to improve gas distribution uniformity across the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed faceplate is used for gas distribution, then the device structure is simple, but gas distribution uniformity deteriorates at outer edges
Solution Approach 1:
The faceplate is divided into multiple independently adjustable segments or zones, each capable of controlling gas flow separately. This segmentation allows optimization of gas distribution to different regions (center vs. outer edges) independently, resolving the uniformity issue while maintaining overall structural simplicity.
Solution Approach 2:
The faceplate incorporates dynamically adjustable elements such as movable gas distribution plates or可变 flow control mechanisms that can change gas flow patterns during operation. This dynamic capability enables adaptation to different process requirements and maintains uniform gas distribution without requiring complex fixed structures.
2Adaptability or versatility
If the faceplate is fixed and requires frequent changes for different processes, then gas distribution can be optimized for specific processes, but productivity decreases due to maintenance time
Solution Approach 1:
The faceplate design incorporates multi-functional capabilities, allowing a single faceplate structure to serve multiple process types through adjustable parameters or configurations. This universality eliminates the need for frequent faceplate changes between different semiconductor manufacturing processes, thereby maintaining process optimization while improving productivity.
Solution Approach 2:
The faceplate includes dynamically adjustable features that can be reconfigured during operation to accommodate different process requirements. This dynamic adaptability allows the same physical faceplate to optimize gas distribution for various processes without requiring physical replacement, thus maintaining versatility while eliminating downtime.
3Device complexity
If gas distribution is not uniform at outer edges, then device structure is simple, but etch rate uniformity deteriorates
Solution Approach 1:
The gas distribution system implements local quality control by providing different gas flow characteristics to different regions of the substrate. Specifically, the outer edge regions receive enhanced or adjusted gas flow compared to the center, ensuring uniform etch rates across the entire substrate while maintaining overall structural simplicity through targeted local modifications.
Solution Approach 2:
The system employs dynamic gas flow control that can adjust distribution patterns to compensate for edge effects. By dynamically modifying gas flow to outer regions during the etch process, uniform etch rate is achieved without requiring complex static structural modifications throughout the entire device.
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
This solution enhances etch rate uniformity by ensuring consistent gas flow to the outer edges of the substrate, reducing maintenance needs and increasing productivity by allowing for customizable gas distribution configurations without changing the faceplate.
Implementation Method 1
includes a first plurality of holes arranged to direct gas from the first gas source into a process chamber at a first angle. A second ring is adjacent to the first ring... includes a second plurality of holes arranged to direct gas from the at least one of the first gas source and the second gas source into the process chamber at the first angle or a second angle
Data Source
AI summary
A side tuning ring for a gas distribution device of a substrate processing system includes a first ring adjacent to a faceplate of the gas distribution device. The first ring surrounds the faceplate and defines a first plenum, communicates with a first gas source, and includes a first plurality of holes arranged to direct gas from the first gas source into a process chamber at a first angle. A second ring is adjacent to the first ring. The second ring surrounds the first ring and defines a second plenum, communicates with at least one of the first gas source and a second gas source, and includes a second plurality of holes arranged to direct gas from the at least one of the first gas source and the second gas source into the process chamber at the first angle or a second angle. The first ring and the second ring are detachable from the faceplate of the gas distribution device.