It can do this for a wide range of solution types and viscosities at rates ranging from a few centimetres per second to several meters per second. The technique itself offers high levels of coating uniformity across the length/width of the coating surface and can deposit thin films with thicknesses ranging from a few nanometres to many microns. One of the main advantages of slot die coating over traditional techniques like spin coating or dip coating is that it can easily be integrated into scale-up processes including roll-to-roll coating and sheet-to-sheet deposition systems. Slot die coating is one of many methods that can be used to deposit a thin liquid film onto the surface of a substrate. The Ossila Slot Die Coater, for example, can produce coatings with variations lower than 5% across many meters and a variation of < 50 μm variation over 100 mm (0.05%). In addition, slot die coating is capable of achieving extremely uniform films across large areas. Slot die coating is an extremely versatile deposition technique in which a solution is delivered onto a substrate via a narrow slot positioned close to the surface.Ī major advantage of the slot die coating method is the simple relationship between wet-film coating thickness, the flow rate of solution, and the speed of the coated substrate relative to the head.
Slot Die Coating: Theory, Design, & Applications
