Differential Temperature Control for MOCVD Substrate Processing
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Solution Overview
Problem
Existing substrate processing devices face inefficiencies in cleaning byproducts, particularly metal accumulations, within the chamber during MOCVD processes, leading to increased defect rates and operational costs due to non-uniform temperature distributions and the need for manual wet etching.
Innovation Solution
A device with a gas distribution unit featuring differential temperature control units for the central and edge regions, allowing for rapid temperature adjustments and maintaining higher temperatures in the edge region for efficient dry etching, enabling in-situ cleaning without opening the chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual wet etching is used to clean byproducts from the chamber, then cleaning effectiveness is improved, but cleaning costs increase and operational efficiency decreases
Solution Approach 1:
The patent replaces manual mechanical cleaning operations with an automated thermal field system. Temperature control units create specific temperature distributions within the chamber to enable automatic removal of byproducts through controlled thermal processes, eliminating the need for manual wet etching while maintaining cleaning effectiveness and improving operational efficiency
Solution Approach 2:
The chamber cleaning process is made self-service through automated temperature control. The system automatically adjusts temperature distributions to facilitate byproduct removal without requiring external manual intervention, thereby reducing cleaning costs and improving operational efficiency while maintaining reliable cleaning effectiveness
2Stability of the object's composition
If uniform temperature distribution is maintained in the chamber, then process stability is improved, but cleaning efficiency of metal byproducts decreases
Solution Approach 1:
The patent applies local quality by creating non-uniform temperature distributions in specific regions of the chamber during cleaning operations. Temperature control units are positioned to generate localized high-temperature zones that target metal byproducts, while maintaining overall process stability through controlled temperature management in different chamber regions
Solution Approach 2:
The system dynamically adjusts temperature distributions based on operational requirements. During deposition, uniform temperature distribution maintains process stability, while during cleaning, the system transitions to non-uniform temperature distribution to maximize cleaning efficiency of metal byproducts, thereby adapting to different operational phases
3Ease of operation
If the chamber is opened for manual cleaning, then access to byproducts is improved, but contamination risk increases and reproducibility decreases
Solution Approach 1:
The patent replaces manual mechanical access to the chamber with a thermal field-based cleaning system. Temperature control units create thermal conditions that enable byproduct removal without requiring chamber opening, thereby eliminating contamination risks and ensuring consistent reproducibility while maintaining ease of operation through automated processes
Solution Approach 2:
The patent introduces temperature control units as intermediary elements that mediate the cleaning process. These units create thermal fields that facilitate byproduct removal without direct mechanical access or chamber opening, thereby preventing contamination while maintaining operational ease and ensuring reproducible cleaning results
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 approach maximizes cleaning efficiency, reduces defect rates, and ensures high reproducibility and operational efficiency by uniformly controlling chamber temperatures and facilitating dry etching of metal byproducts within the MOCVD process.
Implementation Method 1
a first temperature control unit installed in a central region of the gas distribution unit and configured to increase a temperature of the central region; and a second temperature control unit installed in an edge region of the gas distribution unit and configured to increase a temperature of the edge region more rapidly than the temperature of the central region
Data Source
AI summary
The device for processing a substrate according to an embodiment of the present disclosure includes a chamber, a substrate supporting unit which is provided inside the chamber and supports a substrate provided inside the chamber, a gas distribution unit which is provided inside the chamber to face the substrate supporting unit and distributes a process gas toward the substrate supporting unit, a first temperature control unit which is installed in a central region of the gas distribution unit and increases a temperature of the central region, and a second temperature control unit which is installed in an edge region of the gas distribution unit and increases a temperature of the edge region more rapidly than the temperature of the central region.