Spin Coater, also known as a glue spreader or spin coating machine, is an experimental or production equipment used to uniformly coat thin films on the surface of substrates such as silicon wafers, glass, metals, etc. It uniformly spreads liquid materials (such as photoresist, polymer solutions, nanomaterial suspensions, etc.) and forms controllable thickness thin films through centrifugal force generated by high-speed rotation, which is widely used in fields such as semiconductors, microelectronics, optical coatings, and materials science.