The spin coating process generally consists of four key stages: deposition, spin-up, spin-off, and evaporation. During the deposition stage, a controlled amount of coating material is placed on the substrate. During spin-up, the substrate accelerates to the desired speed, causing the solution to spread thinly and uniformly. In the spin-off stage, excess solution is expelled off the edges of the substrate. Finally, during evaporation, the solvent in the coating material evaporates, leaving behind a thin, solid film.
