Gas enclosure assembly and system
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.
1. A method for printing in a controlled environment comprising:
circulating a gas within an enclosure defining an internal volume, wherein the enclosure comprises a plurality of frame members contoured around a printing system;
controlling the process environment within the enclosure, wherein controlling the process environment comprises:
circulating the gas through a purification system to remove reactive species from the process environment;
circulating the gas through a filtration system to provide filtration of particulate matter from the gas after the gas moves along a path of travel of a substrate within the printing system; and
printing the substrate within the controlled process environment of the enclosure.
2. The method of claim 1 , wherein the gas circulating in the enclosure is selected from nitrogen, at least one noble gas, and a combination of nitrogen and at least one noble gas.
3. The method of claim 1 , wherein the gas circulating in the enclosure is clean dry air.
4. The method of claim 1 , wherein the reactive species are removed to prevent contamination, oxidation and damage of materials and substrates processed in the printing system.
5. The method of claim 1 , wherein the reactive species comprise at least one of water vapor, oxygen, and organic solvent vapor.
6. The method of claim 1 , wherein the reactive species are controlled to be at about 100 ppm or less.
7. The method of claim 1 , wherein the reactive species are controlled to be at about 0.1 ppm or less.
8. The method of claim 1 , wherein circulating the gas through the filtration system controls particulate matter to meet ISO 14644 Class 3 clean room standards.
9. The method of claim 1 , wherein controlling the process environment further comprises controlling the temperature within the enclosure.
10. The method of claim 9 , wherein controlling the temperature within the enclosure comprises utilizing a plurality of heat exchangers and at least one of a fan or another gas circulating device.
11. The method of claim 1 , wherein controlling the process environment further comprises controlling the lighting within the enclosure.
12. The method of claim 11 , wherein controlling the lighting within the enclosure comprises using light from a plurality of lighting elements within the enclosure, each of the light elements having a light source having a peak intensity between about 500 nm to about 700 nm.
13. The method of claim 1 , wherein the internal volume is about 6 cubic meters to about 95 cubic meters.
14. The method of claim 1 , wherein the internal volume is about 30% to about 70% less than an internal volume defined by another enclosure that is not contoured around the printing system and that has comparable gross dimensions of a footprint of the enclosure.
15. The method of claim 1 , wherein the enclosure is sized to accommodate the printing of substrates from sizes ranging from Gen 3.5 to Gen 10.
16. The method of claim 1 , wherein printing the substrate comprises depositing material on the substrate via ink jet printing.
17. The method of claim 1 , wherein printing the substrate comprises printing an organic material on the substrate.