A precision coating technique utilizes a narrow, elongated aperture to deposit a uniform liquid film onto a moving substrate. This method controls coating thickness and width precisely through parameters such as substrate speed, coating solution flow rate, and die gap. Common applications include manufacturing flexible electronics, optical films, and battery components.
This controlled deposition process offers significant advantages, including reduced material waste, improved coating uniformity, and the ability to create thin films with tight tolerances. The technique has evolved from early adaptations in industries like photography to become a cornerstone of modern advanced manufacturing, enabling the production of high-performance products.