Patent ID: 8860924
Filing Date: 2014-10-14
Classification: G03F,H01L

Abstract:
1. A lithographic apparatus comprising: a substrate table constructed to hold a substrate; a projection system configured to project a patterned radiation beam onto a target portion of a surface of the substrate and having an element immediately adjacent the substrate, the element having a cross-sectional shape in a plane substantially parallel to the substrate similar to the shape of the target portion; and a liquid confinement structure having a surface at least in part defining a space configured to contain a liquid between the projection system and the substrate, wherein a bottom surface of the liquid confinement structure is closer to the substrate table than a bottom surface of the element, and in a plane substantially parallel to the surface of the substrate, an inner boundary of the liquid confinement structure that surrounds a path of the patterned radiation beam to the substrate defines an aperture, the aperture having a shape that has a plurality of sides and which substantially conforms in shape to the shape of the target portion.