Epitaxial Reactor Load-Lock Handling for Hot SiC Substrates
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Solution Overview
Problem
Existing epitaxial reactors face challenges in efficiently handling substrates at high temperatures and pressures during the deposition of semiconductor materials, particularly silicon carbide, with limitations in automation and handling efficiency.
Innovation Solution
The reactor incorporates a treating arrangement comprising a reaction chamber, transfer chamber, loading/unloading group, and storage chamber, with automated substrate handling using substrates support devices and robots, enabling high-temperature operations and efficient substrate transfer and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automated substrate handling is implemented using robots and treating arrangement, then handling efficiency and automation are improved, but device complexity increases
Solution Approach 1:
The treating arrangement is divided into distinct functional modules: storage chamber for holding substrates, transfer chamber for moving substrates between zones, loading/unloading group for substrate insertion and removal, and reaction chamber for epitaxial deposition. This segmentation allows each module to perform its specific function independently, improving automation while managing complexity through modular design.
Solution Approach 2:
A robot acts as an intermediary device that automatically transfers substrates between the storage chamber, transfer chamber, and reaction chamber. This robotic intermediary enables automated handling without requiring direct human intervention in the high-temperature processing zones, thereby improving automation efficiency.
2Productivity
If substrates are extracted from reaction chamber at high temperature, then processing efficiency is improved, but risk of thermal damage and handling difficulty increase
Solution Approach 1:
The transfer chamber is pre-cooled to a lower temperature before substrates are transferred from the hot reaction chamber. This preliminary cooling preparation allows substrates to be gradually cooled during transfer, reducing thermal shock and damage risk while maintaining processing efficiency by avoiding complete cooling cycles.
Solution Approach 2:
The transfer chamber serves as a thermal intermediary zone between the high-temperature reaction chamber and the ambient storage chamber. Substrates pass through this intermediate temperature zone, allowing controlled thermal transition and reducing the risk of thermal damage during handling.
3Ease of operation
If multiple chambers and handling groups are added, then substrate handling capability is improved, but system complexity and space requirements increase
Solution Approach 1:
The loading/unloading group integrates multiple functions: substrate loading into the transfer chamber, substrate unloading from the transfer chamber, and coordination with the robot for automated handling. By merging these functions into a single coordinated group, the system improves ease of operation while managing complexity through functional integration rather than separate components.
Solution Approach 2:
The transfer chamber serves multiple functions: it acts as a transition zone for substrate movement, a cooling chamber for thermal management, and a buffer zone for coordinating between the robot and reaction chamber operations. This multi-functionality improves handling capability while reducing the need for separate dedicated components.
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 high-temperature epitaxial deposition of semiconductor materials on substrates with improved automation and handling efficiency, allowing for precise and reliable processing of silicon carbide layers for electronic components.
Implementation Method 1
reactor for epitaxial deposition at high temperature (in particular higher than 1,300° C. and lower than 1,800° C.) of layers of semiconductor material on substrates
Implementation Method 2
reactor for the epitaxial deposition of silicon carbide on silicon carbide substrates
Implementation Method 3
epitaxial deposition of layers of semiconductor material on substrates of semiconductor material for the production of electrical components
Data Source
AI summary
The treating arrangement (900) for an epitaxial reactor (1000) comprises: a reaction chamber (100) for treating substrates, a transfer chamber (200) adjacent to the reaction chamber (100), for transferring substrates placed over substrates support devices, a loading/unloading group (300) at least in part adjacent to the transfer chamber (200), arranged to contain a substrates support device with one or more substrates, a storage chamber (400) containing at least in part the loading/unloading group (300), having a first storage zone (410) for treated and/or untreated substrates and a second storage zone (420) for substrates support devices without any substrate, at least one external robot (500) for transferring treated substrates, untreated substrates and substrates support devices without any substrate between said storage chamber (400) and said loading/unloading group (300), at least one internal robot (600) for transferring substrates support devices with one or more substrates between said loading/unloading group (300) and said reaction chamber (100) via said transfer chamber (200); said loading/unloading group comprises a load-lock chamber (300A) and a preparation station (300B) associated with each other.