Atomic-layer deposition apparatus
View Patent ↗A thin film deposition system for depositing a thin film on a moveable substrate using atmospheric pressure atomic-layer deposition includes a chamber and a moveable substrate having a levitation stabilizing structure located on the moveable substrate that defines an enclosed interior impingement area of the moveable substrate. A stationary support, located in the chamber, supports the moveable substrate. The stationary support extends beyond the enclosed interior impingement area. A pressurized-fluid source provides a fluid flow through the stationary support that impinges on the moveable substrate within the enclosed interior impingement area of the moveable substrate sufficient to levitate the moveable substrate and expose the moveable substrate to the fluid while restricting the lateral motion of the moveable substrate with the levitation stabilizing structure.
1. A fluidic levitation system for levitating a moveable substrate, comprising:
a moveable substrate having a levitation stabilizing structure attached to and protruding from the moveable substrate, the levitation stabilizing structure forming a closed geometric shape that surrounds and encloses an enclosed interior impingement area of the moveable substrate;
a stationary support located proximate to the moveable substrate, the stationary support extending beyond the enclosed interior impingement area; and
a pressurized-fluid source that provides a fluid flow through the stationary support that impinges on the moveable substrate within the enclosed interior impingement area of the moveable substrate sufficient to levitate the moveable substrate due to a Bernoulli lift force caused by the impingement of the fluid flow onto the moveable substrate, thereby forming a gap between the moveable substrate and the stationary support and exposing the moveable substrate to the fluid, wherein fluid flow impinging on the levitation stabilizing structure restricts the lateral motion of the moveable substrate during levitation.
2. The fluidic levitation system of claim 1 , wherein the fluid flow provided through the stationary support impinges proximate to a centroid of a surface of the moveable substrate.
3. The fluidic levitation system of claim 1 , wherein the fluid flow provided through the stationary support impinges proximate to a centroid of the enclosed interior impingement area of the moveable substrate.
4. The fluidic levitation system of claim 1 , wherein the stationary support is located beneath the moveable substrate.
5. The fluidic levitation system of claim 1 , wherein the stationary support is located above the moveable substrate.
6. The fluidic levitation system of claim 1 , the stationary support including a fluid collimating conduit through which the fluid flows, wherein the fluid collimating conduit has a cross sectional area that is less than or equal to ¼ of the area enclosed by the levitation stabilizing structure.
7. The fluidic levitation system of claim 1 , the stationary support including a fluid collimating conduit through which the fluid flows, wherein the fluid collimating conduit has a cross sectional area that is less than or equal to ¼ of the area of the surface of the moveable substrate on which levitation stabilizing structure is located.
8. The fluidic levitation system of claim 1 , wherein the levitation stabilizing structure has a height extending away from the moveable substrate that is less than ⅔ of the gap between the moveable substrate and the stationary support when the moveable substrate is levitated.
9. The fluidic levitation system of claim 1 , wherein the levitation stabilizing structure has a height protruding from the moveable substrate that is between 50 microns and 5 mm.
10. The fluidic levitation system of claim 1 , wherein the levitation stabilizing structure has a constant height.
11. The fluidic levitation system of claim 1 , wherein the moveable substrate further includes an additional structure attached to and protruding from the moveable substrate, the additional structure being located within the enclosed interior impingement area of the levitation stabilizing structure.
12. The fluidic levitation system of claim 11 , wherein the additional structure has a height that is less than a height of the levitation stabilizing structure.
13. The fluidic levitation system of claim 11 , wherein the additional structure is solid.
14. The fluidic levitation system of claim 11 , wherein the additional structure forms a closed curve.
15. The fluidic levitation system of claim 1 , wherein the stationary support extends beyond the moveable substrate.
16. The fluidic levitation system of claim 1 , wherein the moveable substrate is substantially non-planar.
17. The fluidic levitation system of claim 16 , wherein the substantially non-planar moveable substrate includes a spherical section.
18. The fluidic levitation system of claim 16 , wherein the substantially non-planar moveable substrate includes a structured surface.
19. The fluidic levitation system of claim 1 , wherein the levitation stabilizing structure is attached to the movable substrate using an adhesive.
20. The fluidic levitation system of claim 1 , wherein the levitation stabilizing structure includes a curable material with cross-linking agents.
21. The fluidic levitation system of claim 1 , wherein the levitation stabilizing structure is mechanically and releasably attached to the moveable substrate.
22. The fluidic levitation system of claim 1 , wherein the levitation stabilizing structure includes a deposition inhibiting layer.