Modular Gas Enclosure Assembly for Inert OLED Printing Access
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Solution Overview
Problem
The challenge lies in creating a hermetically sealed gas enclosure system that can maintain an inert, substantially particle-free environment for OLED printing, particularly for larger substrate sizes, while allowing for easy access and minimal downtime for maintenance, as existing solutions struggle with scaling and maintaining low levels of reactive species like oxygen and water vapor.
Innovation Solution
A gas enclosure assembly with a modular design featuring frame members that can be sealed together using reusable fasteners, incorporating ductwork for gas circulation and filtration, and a pressurized inert gas recirculation system to maintain low levels of reactive species and particles, allowing for easy access and rapid volume turnover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hermetically sealed gas enclosure system is used to maintain inert atmosphere for OLED printing, then the levels of reactive species (oxygen, water vapor) are reduced, but the access for maintenance and substrate loading becomes difficult
Solution Approach 1:
The gas enclosure system is divided into multiple sealed modules (printing chamber, substrate handling chamber, maintenance chamber) that can be independently accessed and maintained. Each module has its own sealing system, allowing maintenance personnel to access specific areas without compromising the entire enclosure's inert atmosphere.
Solution Approach 2:
Glove ports with attached gloves serve as intermediary interfaces between the inert atmosphere interior and the external environment. These allow operators to perform maintenance and substrate loading tasks while wearing gloves that seal against the glove ports, maintaining the hermetic seal while enabling access.
2Area of stationary object
If the gas enclosure system is designed for large substrate sizes, then the fabrication capability is improved, but the gas volume increases leading to longer purification times and increased downtime
Solution Approach 1:
The enclosure is segmented into functional zones (printing area, substrate loading area, maintenance area) that can be independently purged and pressurized. This allows selective purification of only the areas currently in use rather than the entire volume, significantly reducing purification time for large substrate processing.
Solution Approach 2:
The system pre-establishes inert atmosphere conditions in the printing chamber before substrate transfer, and uses rapid purging protocols with high-flow gas delivery systems positioned strategically to quickly displace atmospheric gases. The modular design allows pre-purification of individual modules before they are needed.
3Adaptability or versatility
If cabling and tubing are extended to feed into the OLED printing system, then the operational functionality is improved, but the dead volume increases occluding reactive species
Solution Approach 1:
Cabling and tubing are routed through external sealed feedthroughs and bellows that extend the system interfaces to the exterior while maintaining the hermetic seal. This extracts the cabling from the internal volume, eliminating the dead volume problem while preserving full operational functionality for substrate handling and printing operations.
4Ease of manufacture
If the gas enclosure system is made modular with reusable fasteners, then the ease of assembly and maintenance is improved, but the sealing reliability becomes more challenging
Solution Approach 1:
The system uses standardized modular components with integrated sealing elements (gaskets, O-rings, bellows) that are pre-assembled with reusable fasteners. Each module is designed to be independently sealed, and the modular interfaces incorporate robust sealing mechanisms that maintain hermetic integrity through repeated assembly and disassembly cycles.
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
The system effectively maintains low levels of reactive species and particles, enabling the fabrication of OLED panels on larger substrates with reduced downtime and increased accessibility, thus overcoming the limitations of existing technologies in scaling OLED printing.
Implementation Method 1
incorporating ductwork for gas circulation and filtration, and a pressurized inert gas recirculation system to maintain low levels of reactive species and particles
Implementation Method 2
incorporating ductwork for gas circulation and filtration
Data Source
AI summary
The present teachings relate to various embodiments of an hermetically-sealed gas enclosure assembly and system that can be readily transportable and assemblable and provide for maintaining a minimum inert gas volume and maximal access to various devices and apparatuses enclosed therein. Various embodiments of an hermetically-sealed gas enclosure assembly and system of the present teachings can have a gas enclosure assembly constructed in a fashion that minimizes the internal volume of a gas enclosure assembly, and at the same time optimizes the working space to accommodate a variety of footprints of various OLED printing systems. Various embodiments of a gas enclosure assembly so constructed additionally provide ready access to the interior of a gas enclosure assembly from the exterior during processing and readily access to the interior for maintenance, while minimizing downtime.