Project Overview

Spin coating is a procedure used to deposit uniform thin films to flat substrates. A small amount of coating material is applied on the center of the film. 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.

Spin coater consists of several main blocks. Power unit - DC electric motor with gearbox. The reducer provides the necessary frequency interval of rotation of the working chamber. The power supply unit of the device converts AC voltage of 220V, 50 Hz to DC voltage of 9V, which provides power to the electrical circuits of the device. The driver unit of the power circuit makes it possible, smoothly changing the voltage on the electric motor, to change the speed of the working chamber from 500 to 4000 rpm, which makes it possible to use solutions of different densities and substrates of different materials to produce nano-films.

The electronic part of the device consists of a control unit, speed sensor, driver electronics, LCD-monitor and control panel. The Central part of the control unit is a microcontroller STM32F103C6, which receives signals from the optical speed sensor and control panel keys controls the device and displays information on the LCD monitor.


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