Additively Manufactured Gas Injector With Integrated Cooling Channels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional gas injectors for chemical vapor deposition systems face limitations in design and assembly, particularly when scaling up to larger wafer sizes, leading to inefficiencies in gas flow and cooling, and are restricted by traditional manufacturing techniques that hinder the formation of intricate internal features and complex shapes.
Innovation Solution
The use of additive manufacturing to create a unitary gas injector with integrated gas and coolant channels, allowing for precise control over structural features and enabling laminar gas flow patterns with efficient cooling, overcoming limitations of traditional manufacturing methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional manufacturing techniques are used to create gas injectors, then assembly is simplified with fewer integrated features, but design flexibility and manufacturing of intricate internal features are limited
Solution Approach 1:
The patent combines multiple separate components (gas distribution device, susceptor, heater assembly) into a single unitary structure manufactured by additive manufacturing. This merging enables intricate internal features like gas channels and heating elements to be integrated within the susceptor body, achieving both manufacturing efficiency and design flexibility simultaneously.
Solution Approach 2:
The patent utilizes additive manufacturing technology to change the manufacturing parameters and capabilities, enabling the creation of complex internal geometries and structures that were previously impossible with traditional manufacturing methods. This allows for optimized gas flow patterns and efficient cooling channels while maintaining ease of manufacture.
2Device complexity
If conventional gas injector designs are used, then structural simplicity is maintained, but gas flow efficiency and cooling performance are insufficient for larger wafers
Solution Approach 1:
The patent transitions from conventional two-dimensional gas distribution surfaces to a three-dimensional unitary structure with internal channels and cavities. This dimensional change enables gas to be distributed more efficiently throughout the larger wafer area, improving productivity while managing the increased structural complexity through integrated design.
Solution Approach 2:
The unitary structure allows for local optimization of gas flow and cooling characteristics at different regions of the susceptor. Gas channels and cooling passages can be strategically positioned to provide enhanced performance where needed, particularly for larger wafers, while maintaining overall structural integrity.
3Adaptability or versatility
If additive manufacturing is used to create unitary gas injectors, then design flexibility and internal feature formation are improved, but manufacturing complexity increases
Solution Approach 1:
By merging multiple functions (gas distribution, heating, cooling) into a single unitary structure, the patent reduces the number of separate manufacturing processes and assemblies required. Although the internal geometry is complex, the additive manufacturing process creates the entire structure in one operation, actually simplifying the overall manufacturing workflow.
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 additive manufacturing approach results in a compact, efficient gas injector design that achieves uniform gas distribution and effective cooling, enhancing the performance of chemical vapor deposition processes, particularly for larger wafers.
Implementation Method 1
The susceptor is positioned within a reaction chamber and a heater assembly is provided for heating the susceptor to an elevated temperature
Implementation Method 2
In MOCVD, reactant gases are introduced into a reaction chamber within a controlled environment that enables the reactor gas to react on a substrate (commonly referred to as a 'wafer') to grow thin epitaxial layers
Data Source
AI summary
A chemical vapor deposition system includes a reaction chamber having an exhaust system and a gas injector having at least one injection zone. The system further includes a heater assembly for heating the reaction chamber. In accordance with the present disclosure, the gas injector is additively manufactured to form a unitary body.