L SPIN-04

Spin coaters are systems used to coat homogeneous thin films on flat samples. The coating material, which is applied in a small amount to the center of the sample surface placed in the system, is rotated at speeds up to 10k rpm and laid on the sample surface.

The rotation process is continued until the film reaches the desired thickness. Minimum film thicknesses are generally dependent on the viscosity and concentration of the material.  

The spin coating cycle consists of four basic stages: placing, spinning, spinning and evaporation. First, a solution is poured onto the substrate using a pipette or a syringe pump. The solution is then pushed outward by the centripetal force, covering the surface of the substrate. At this point, most of the excess solution is discarded and the airflow begins to dry the film. Finally, in the final stage with a separate cooking process, the solvent evaporates, leaving a thin, uniform film behind.