Patent ID: 9678428
Date: 2017-06-13
CPC Classifications: G03F

Claim:
1. A light irradiating apparatus, comprising: an ultraviolet light emission lamp configured to emit vacuum ultraviolet light toward a workpiece to be disposed in an atmosphere of a treatment gas including oxygen; a light passing window adapted to be disposed between the workpiece and the ultraviolet light emission lamp and configured to allow the vacuum ultraviolet light from the ultraviolet light emission lamp to pass therethrough, the light passing window comprising a light-exiting surface; and a spacer adapted to be disposed between the light passing window and the workpiece, to apply a pressing force onto the workpiece and to form a gap that allows a distance from the light-exiting surface of the light passing window to a surface of the workpiece to be of a uniform size over the entire surface of the workpiece, wherein the light passing window includes a base having a thickness of a uniform size and having a light-exiting surface, and the spacer comprises a plurality of protrusions provided on the light-exiting surface of the base, the plurality of protrusions being configured to be in contact with the surface of the workpiece to apply the pressing force onto the workpiece.