Patent ID: 8236106
Filing Date: 2012-08-07
Classification: C23C,H01J

Abstract:
1. A shower head provided in a processing chamber for processing a substrate therein, the shower head having a facing surface facing a mounting table for mounting thereon the substrate and serving to supply a gas through the facing surface toward the substrate, the shower head comprising: a central gas supply unit for supplying the gas through the center of the facing surface toward the substrate; a peripheral gas supply unit for supplying the gas through a peripheral portion of the facing surface toward the substrate; and a gas exhaust unit, provided with a plurality of gas exhaust holes formed between the central and the peripheral gas supply unit, for exhausting the gas through the facing surface, wherein the central gas supply unit includes a plurality of central gas injection openings provided at the center of the facing surface to supply the gas toward the substrate, a central gas diffusion space formed in the shower head to directly face the central gas injection openings, and a gas inlet portion connected to the central gas diffusion space to supply the gas thereto, wherein the peripheral gas supply unit includes a plurality of peripheral gas injection openings provided at the peripheral portion of the facing surface to supply the gas toward the substrate and a peripheral gas diffusion space formed in the shower head to directly face the peripheral gas injection openings, and wherein a plurality of gas channels are formed radially from the center toward the peripheral portion of the shower head, so that the central gas diffusion space communicates with the peripheral gas diffusion space.