Inert Gas Bypass Layout for Substrate Storage Reliability
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Solution Overview
Problem
Existing article storage facilities fail to prevent negative effects on substrates when inactive gas supply is disrupted due to damage or failure in gas feed passages, leading to ambient air ingress and oxidation of substrates.
Innovation Solution
Incorporating a bypass portion with a bypass switching valve that allows communication between storage unit feeding portions, enabling inactive gas to be redirected from properly supplied sections to sections with inadequate supply, and a controller to manage storage units based on gas supply state detection, ensuring substrates are stored in units with proper gas supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single gas feed passage system is used for all storage units, then the device complexity is reduced, but the reliability of gas supply to individual storage units deteriorates
Solution Approach 1:
The gas feed passage system is segmented into multiple independent sections, each serving specific storage units. This segmentation allows individual sections to be isolated and maintained without affecting the entire system, thereby improving reliability while maintaining manageable complexity.
Solution Approach 2:
Bypass passages are pre-configured within each section to provide alternative gas supply routes before primary passages fail. This preliminary preparation ensures continuous gas supply to storage units even when primary feed passages are damaged or under maintenance.
2Object-affected harmful factors
If inactive gas is continuously supplied to all storage units, then substrate protection is improved, but energy consumption increases
Solution Approach 1:
Inactive gas supply is applied locally only to storage units that actually contain substrates requiring protection, rather than continuously supplying all storage units. This localized approach maintains substrate protection while significantly reducing unnecessary energy consumption from gas supply.
Solution Approach 2:
The system monitors the presence of substrates in storage units and adjusts gas supply accordingly. When substrates are detected, inactive gas is supplied to protect them; when storage units are empty, gas supply is reduced or stopped, optimizing energy efficiency.
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
Prevents negative effects on substrates by ensuring continuous inactive gas supply even when primary gas feed is compromised, maintaining a stable environment for stored substrates and optimizing storage unit utilization.
Implementation Method 1
a bypass portion (72) for allowing communication between two or more of the storage unit feeding portions (63)
Data Source
AI summary
An article storage facility comprises a plurality of storage units for storing transporting containers for substrates and inactive gas feed passages for supplying inactive gas to each of the plurality of said storage units. The plurality of storage units are divided into a plurality of sections. The inactive gas feed passages include section feeding portions which supply the inactive gas to the sections, and storage unit feeding portions which divert and supply the inactive gas, that is supplied to a respective section by an associated one of the section feeding portions, to the plurality of storage units in the respective section. The article storage facility includes a bypass portion which allows communication between two or more storage unit feeding portions, and a bypass switching valve that can be switched between an open state in which the inactive gas can be communicated through the bypass portion and a closed state in which the inactive gas cannot be communicated through the bypass portion.