Modular Electrostatic Chuck Assembly for Crack-Resistant Thermal Tuning
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Solution Overview
Problem
Traditional electrostatic chucks and heaters for substrate processing are monolithic, leading to increased risk of cracking and limited functionality due to embedded components, requiring replacement of the entire unit upon failure.
Innovation Solution
A modular substrate support assembly composed of multiple puck plates with functional elements, allowing for customization and adjustment of thermal response by combining and bonding plates with interface layers, enabling fine control of thermal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a monolithic ceramic body is used to embed all functional elements, then the structural integrity is improved, but the risk of cracking during manufacture and use increases
Solution Approach 1:
The electrostatic chuck is divided into multiple separate ceramic bodies (first electrostatic chuck body, second electrostatic chuck body, third electrostatic chuck body) instead of using a single monolithic structure. Each body contains specific functional elements (electrodes, heating elements) and can be manufactured and tested independently, reducing the risk of cracking during manufacture and use while maintaining structural integrity through controlled bonding interfaces
2Adaptability or versatility
If multiple functional elements are embedded in a single electrostatic chuck body, then the functionality is improved, but the complexity of manufacture increases
Solution Approach 1:
Different functional elements (electrodes, heating elements, cooling channels) are distributed across multiple separate ceramic bodies rather than embedding all functions in a single complex body. This segmentation allows each body to be manufactured with simpler geometry and fewer embedded features, reducing manufacturing complexity while achieving comprehensive functionality through assembly
Solution Approach 2:
Each ceramic body is designed to perform multiple functions within its structure. For example, the first electrostatic chuck body contains both first electrodes for electrostatic chucking and first heating elements for thermal control. This multi-functionality at the component level reduces the need for additional separate components, simplifying the overall assembly
3Device complexity
If a monolithic structure is used, then the device complexity is reduced, but the ability to adjust and customize thermal response is limited
Solution Approach 1:
The electrostatic chuck is segmented into multiple independent ceramic bodies, each capable of being customized with specific heating elements, cooling channels, and thermal insulation features. This segmentation enables different thermal responses in different regions or zones of the chuck, allowing customization of thermal characteristics while maintaining relatively simple individual component structures
Solution Approach 2:
Different ceramic bodies or regions within bodies are designed with different thermal properties through selective placement of heating elements, cooling channels, and insulation materials. This allows local optimization of thermal response characteristics in specific areas of the electrostatic chuck, enabling customized thermal management for different processing requirements
4Reliability
If the entire electrostatic chuck is replaced upon functional component failure, then the reliability is maintained, but the loss of time and material increases
Solution Approach 1:
The electrostatic chuck is designed as an assembly of multiple separate ceramic bodies that can be independently removed and replaced. If a functional component fails in one body, only that specific body needs to be replaced rather than the entire chuck assembly, significantly reducing replacement time and material waste while maintaining the reliability of the overall system
Solution Approach 2:
The modular design allows damaged or worn ceramic bodies to be selectively discarded and replaced, while functional bodies are retained and reused. This selective replacement strategy reduces material waste and extends the overall lifecycle of the electrostatic chuck system, improving both economic efficiency and environmental sustainability
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
Facilitates quick assembly and testing of substrate supports, reduces risk of cracking, and allows for tailored thermal performance by adjusting individual plates, enhancing reliability and flexibility.
Implementation Method 1
an interface layer at least partially bonding the first puck plate and the second puck plate
Implementation Method 2
a first heating electrode in a first heating zone of the body, and a second heating electrode in the first heating zone of the body
Data Source
AI summary
An electrostatic chuck assembly includes a first puck plate including one or more first functional elements, a second puck plate including one or more second functional elements, and an interface layer at least partially bonding the first puck plate and the second puck plate.