Abstract: An apparatus for coating the flat surface of a substrate with a coating material is disclosed in which only a minimum amount of coating material is required for uniformly coating the entire surface of the substrate in an efficient manner under a variety of coating conditions, even if the substrate surface takes a non-circular configuration. According to one embodiment, the flat surface of the substrate is first coated with a coating material, and the substrate thus coated is then spunned at predetermined number of revolutions per minute. According to another embodiment, the apparatus includes a support table on which the substrate is fixedly mounted. A plurality of shaping members are slidably mounted on the support table for forming with the flat non-circular-shaped surface of the substrate a flat continuously extending circular-shaped surface.