Spin Coating

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Definition - What does Spin Coating mean?

Spin coating is a procedure used to apply thin, uniform coatings onto flat substrates. During this process, small amounts of paint or coating material are placed at the center of a substrate that is subject to rotation on a turntable. This rotation induces a centrifugal force on the coating, causing it to spread uniformly on the surface of the substrate.

Spin coating is renowned for its ability to produce very fine, thin and uniformly coated surfaces. This attribute makes it ideal for coating objects in high-precision industries, such as the electronic and medical sectors.

Corrosionpedia explains Spin Coating

The thickness of the coating is determined by the substrate’s rotational speed as well as the surface tension and the viscosity of the coating material. Spinning also accelerates the drying process due to evaporation, removing high volatile compounds while leaving low volatile components on the surface of the substrate.

However, spin coating does have its limitations. As the size of the object increases, obtaining high spinning speeds becomes difficult, thus reducing the efficiency of the coating process.

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