Modular Faceplate Assembly for Semiconductor Processing Chamber Zone Control
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Solution Overview
Problem
Conventional semiconductor processing chambers face challenges in achieving uniformity and tunability of processing conditions across substrate surfaces, particularly as device features shrink, leading to issues with thermal non-uniformity and material property variations.
Innovation Solution
The introduction of a modular faceplate assembly with interchangeable thermal bodies and a gas box with movable members that allow for dynamic zone control, enabling precise adjustment of thermal boundaries and gas delivery profiles to compensate for substrate non-uniformities and optimize processing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If regular patterns of features (such as apertures) are used in chamber components to promote symmetry and uniformity, then uniformity of material delivery is improved, but the ability to tune recipes for on-substrate adjustments is limited
Solution Approach 1:
The faceplate is divided into multiple independently controllable zones with distinct aperture patterns. Each zone can be independently tuned to deliver materials with different characteristics to specific regions of the substrate, enabling both uniformity within zones and adaptability across the substrate surface.
Solution Approach 2:
Different regions of the faceplate are equipped with apertures having different properties (size, shape, distribution) tailored to the specific requirements of corresponding substrate regions. This allows local optimization of material delivery uniformity while maintaining overall adaptability through regional differentiation.
2Adaptability or versatility
If interchangeable thermal bodies are introduced to provide zone control, then the ability to adjust thermal boundaries is improved, but device complexity increases
Solution Approach 1:
The faceplate assembly incorporates movable members that can be dynamically adjusted to change the configuration of thermal zones. This dynamic capability allows the system to adapt to different processing requirements while using a standardized modular architecture that limits overall complexity.
Solution Approach 2:
The interchangeable thermal bodies are designed with standardized interfaces and configurations that allow a single set of components to serve multiple zone control functions. This universality reduces the total number of unique parts needed while providing versatile zone control capabilities.
3Adaptability or versatility
If movable members are added to the gas box for flow control, then the ability to control gas delivery zones independently is improved, but device complexity increases
Solution Approach 1:
The gas box is segmented into multiple independent flow control sections, each with its own movable member. This segmentation enables independent control of gas delivery to different zones while keeping each control section simple and modular, preventing overall system complexity from becoming unmanageable.
4Manufacturing precision
If modular zone control components are used to address substrate non-uniformities, then processing precision is improved, but manufacturing complexity increases
Solution Approach 1:
The modular zone control components are pre-configured with optimized aperture patterns and thermal body arrangements during manufacturing. This preliminary configuration ensures precise control capabilities are built into each module, simplifying both the manufacturing process and the subsequent assembly of the complete faceplate assembly.
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 the ability to control thermal and gas delivery zones independently, improving the uniformity and quality of semiconductor films by allowing for tailored processing environments, addressing the limitations of conventional technologies in adjusting for in-plane distortions and film property variations.
Implementation Method 1
interchangeable thermal bodies that can be selected from multiple interchangeable thermal bodies
Implementation Method 2
plug having a specific thermal emissivity selected from plugs having varied thermal emissivities
Implementation Method 3
gas box includes an upper plate defining delivery ports and a lower plate defining a gas flow path
Implementation Method 4
movable members configured to engage a delivery port and movable to provide flow control for a gas being delivered
Data Source
AI summary
Exemplary semiconductor processing chambers may include a faceplate assembly characterized by at least one surface defining a number of voids. Each void is configured to receive an interchangeable thermal body that can be selected from multiple interchangeable thermal bodies. Exemplary semiconductor processing chambers may also include a gas box characterized by movable members. Each movable member is configured to engage a delivery port and is movable to provide flow control for a gas being delivered to the processing volume through a gas flow path. Zoned flow and/or temperature control may be provided by the faceplate assembly, the gas box, or both.