Dip coating is a wide-used method for thin film coating. it consists of immersing a substrate into fluid in a container, remove it out of the container and let it drain in time. this cycle may be needed multiple times for some coatings. dip coating is popular due to its simplicity that makes it a great choice in automation.
film thickness is affected by fluid viscosity and substrate pull-off speed. however there is some complexities in the process, e.g. film thickness may vary from up to bottom of the substrate, known as “wedge effect”, the process is useful in many fields of science and technology.
Dip coating machines do this procedure in an automatic, easy and accurate way, to make the best results.