A method of producing substrates with functional layers which have high optical properties andor a high surface smoothness, in particular a low turbidity and significantly lower roughness, is provided. The device includes spherical rings having a plurality of slots distributed on their peripheries. A dedicated scan cell has a functional data output separate from a test data output. The system utilizes an artificial intelligence engine driving individualized and dynamic feedback with synchronized video and graphics used to simulate real-world environment and interactions. This structure allows a motor to be reflow-soldered to a board of an apparatus using this motor, and increases impact-resistance against radial load and thrust load applied to a radial and thrust bearings, a coupling section of the bearing supporter and the motor base, a coupling section of a shaft, a coupling section of the motor and the apparatus. A second fluid flows along the outer surface side of each element part.