Patent ID: 7632352

Claim:
A spin coating apparatus comprising a ring-shaped or polygonal auxiliary member wherein the ring-shaped or polygonal auxiliary member is installed adjacent to the side of a substrate for coating, upon mounting the substrate on a turntable, a spaced distance between the inner upper end of the ring-shaped or polygonal auxiliary member and the periphery of the substrate is within a range of 0.03 to 0.8 mm, and heights of the upper ends of the ring-shaped or polygonal auxiliary member and substrate are identical to each other or are positioned within a deviation range of less than 0.1 mm such that a coating resin can migrate toward the ring-shaped or polygonal auxiliary member, wherein the spin coating apparatus includes a stationary part and a moving part, and the moving part has a height-adjustable structure such that the moving part is movable upward and downward relative to the stationary part, wherein the coating resin is dropped on a central portion of the substrate for coating while the spin coating apparatus is rotating at a low speed, and the coating resin spreads outward from the center portion of the substrate due to a centrifugal force and is applied to the entire substrate while the spin coating apparatus is rotating at a high speed.