Patent ID: 8755029
Filing Date: 2014-06-17
Classification: G03F

Abstract:
1. An immersion lithography apparatus, comprising: a container comprising a bottom plate, a plurality of side plates connected to one another, and a bearing hole penetrated through one of the side plates, wherein the side plates surround and connect all edges of the bottom plate; at least a liquid filled in the container having a refractive index ranging from about 1.4 to about 1.8; a platform located in the container and immersed in the liquid, the platform comprising a pair of axles fastened separately on opposite sides thereof, the axles being parallel to the bottom plate and one of the axles being passing through the bearing hole; a fixture mounted on the platform and immersed in the liquid for clamping at least a mask and a wafer; a roller disposed outside the container, the roller being connected to the axle passing through the bearing hole and operated to rotate the connected axle to incline the platform; a light source for generating ultraviolet light to incident on the mask and the wafer; and a filter located in a path of the ultraviolet light interposed between the light source and the fixture.