Abstract: A dielectric barrier discharge excimer lamp is employed as a lamp for emitting ultraviolet light, and this dielectric barrier discharge excimer lamp is turned on during a time period, which is shorter than a working period, for supplying a prescribed amount of ultraviolet energy to a substrate. Even if the working period changes, therefore, the dielectric barrier discharge excimer lamp is turned off when the ultraviolet energy to the substrate reaches the prescribed amount, so that the ultraviolet energy is maintained at a constant level and no excessive temperature rise takes place in the interior of an irradiator. Due to the employment of the dielectric barrier discharge excimer lamp, it is possible to stabilize lamp output within a short time after the lamp is turned on even if the lamp is repeatedly turned on and off, whereby the ovearll time for overall treatment steps is reduced.

Abstract: A spin coating apparatus for use in applying a coating solution in film form to an upper surface of a substrate. This apparatus includes a rotary table for spinning the substrate as supported thereon in horizontal posture, the rotary table having a size larger than an outline contour of the substrate, and an upper rotary plate disposed parallel to and slightly spaced from the upper surface of the substrate supported on the rotary table. The rotary table and upper rotary plate define a flat treating space therebetween, which treating space has peripheral openings for allowing superfluous part of the coating solution to scatter outwardly therefrom. A nozzle plate is disposed between the rotary table and the substrate supported thereon. The nozzle plate receives cleaning liquid supplied through a rotary shaft of the rotary table, and directs the liquid to the lower surface of the substrate.