Patent ID: 6162295
Filing Date: 2000-12-19
Classification: B05C,G03F

Abstract:
A spin coat apparatus, comprising:a rotatable chuck;a shaft attached to the chuck;a spin motor attached to the shaft;a bowl having a bottom containing a raised portion around an opening sized to allow the chuck to pass through the opening, and a side having an upper edge;a circular air ring having an inner rim engaging the raised portion of the bowl, a top surface, a bottom surface opposing the bottom of the bowl to form a lower annular plenum region, and an outer ring;a top ring engaging the upper edge of the side of the bowl, wherein the top ring has a bottom face opposing the top surface of the circular air ring to form an upper annular plenum region and the outer ring and the side of the bowl form a fluid communication path between the upper plenum and the lower plenum; anda dispense assembly oriented toward the chuck.