Multi-channel Flow Ratio Controller for Semiconductor Processing
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Solution Overview
Problem
Semiconductor substrates often experience non-uniform material deposition in thickness and alloy or dopant compositions, affecting the performance of final manufactured devices.
Innovation Solution
The implementation of a semiconductor processing chamber equipped with flow ratio controllers and gas injection inserts, which include multiple channels and gas lines to control and modulate the flow rates and compositions of process gases, ensuring uniform deposition by adjusting the radial gas flow velocity and alloy composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a simple single-channel gas injection system is used, then the device complexity is low, but the manufacturing precision of material deposition is poor due to non-uniform thickness and composition
Solution Approach 1:
The gas injection insert is divided into multiple channels (first plurality of channels and second plurality of channels) with different gas flow paths. Each channel can independently control the flow rate and composition of process gases, allowing precise control over material deposition uniformity across the substrate surface.
Solution Approach 2:
Different channels are assigned to different regions of the substrate to provide locally optimized gas flow characteristics. The flow ratio controllers adjust gas flow rates specifically for each channel based on the deposition requirements of corresponding substrate regions, achieving uniform material distribution through localized control.
2Manufacturing precision
If multiple flow controllers and channels are implemented, then the uniformity of material deposition is improved, but the device complexity and number of components increase
Solution Approach 1:
The flow ratio controllers are designed to manage multiple channels simultaneously, with each controller capable of regulating flow rates across several channels. This multi-functional design reduces the total number of individual controllers needed while maintaining precise control over gas flow distribution and composition uniformity.
Solution Approach 2:
Multiple gas lines are combined into a integrated gas distribution system where flow ratio controllers consolidate the management of several channels. The system merges gas flow control functions into unified controller units that coordinate multiple channels, reducing component count while preserving deposition uniformity.
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 achieves uniform material deposition on semiconductor substrates, enhancing the performance and reliability of manufactured devices by maintaining consistent thickness and alloy or dopant compositions.
Implementation Method 1
flow ratio controllers and gas injection inserts, which include multiple channels and gas lines to control and modulate the flow rates and compositions of process gases
Implementation Method 2
thermally decomposing the process gas to deposit a material from the gas onto the substrate surface
Data Source
AI summary
Implementations of the present disclosure generally relate to one or more flow ratio controllers and one or more gas injection inserts in the semiconductor processing chamber. In one implementation, an apparatus includes a first flow ratio controller including a first plurality of flow controllers, a second flow ratio controller including a second plurality of flow controllers, and a gas injection insert including a first portion and a second portion. The first portion includes a first plurality of channels and the second portion includes a second plurality of channels. The apparatus further includes a plurality of gas lines connecting the first and second pluralities of flow controllers to the first and second pluralities of channels. One or more gas lines of the plurality of gas lines are each connected to a channel of the first plurality of channels and a channel of the second plurality of channels.