Spin Coating Theory
Spin coating is a procedure used to deposit uniform thin films to flat substrates. Usually a small amount of coating solution is applied on the center of the substrate, which is either spinning at low speed or not spinning at all. The substrate is then rotated at high speed in order to spread the coating material by centrifugal force. A machine used for spin coating is called a spin coater, or simply spinner. Rotation is continued while the fluid spins off the edges of the substrate, until the desired thickness of the film is achieved. From
Wikipedia, and
Columbia University.
SCK-300P + Vacuum Chuck
The SCK-300P makes use of the same innovative vacuum chuck design of the SCK-200P, but now uses an Arduino based
Closed-loop Motor Interface Module (
MiM), and Brushless DC motor. This results in an increase speed resolution (+/- 5 vs. +/- 20 rpms for the SCK-200P), and the ability to directly set the desired speed, in 50 rpm increments, from
500 to 8,000 rpms. Like previous models, it comes with everything needed for R&D spin coating work of small substrates.
A suitable Vacuum System needs to be provided by user. View
video to see it in action.
User Manual (pdf) /
Vacuum System Setup Instructions (pdf) /
Specification.
SCK-300S “Low-Speed”
The SCK-300S (Stepper) was developed based on customers request for a version of the SCK-300P which can spin at very low speeds (
10 – 5,000 rpms) with variable acceleration (0-800 rpms/s). These features allows for casting of relatively thick films, or for other non-traditional Spin Coater uses. To meet this requirement, the SCK-300S employs a high precision Stepper motor, combined with an Arduino compatible stepper motor driver.
As such, it has a speed resolution of less than %1 rpms in the speed range from
10 – 5,000 rpms, in increments of 10 rpms. View
video of it in action.
User Manual (pdf) /
Specification.
