Patent ID: 7213963
Filing Date: 2007-05-08
Classification: G03F

Abstract:
1. A lithographic projection apparatus comprising: an illuminator adapted to condition an exposure beam of radiation; a support structure configured to hold a patterning device, the patterning device configured to pattern the exposure beam of radiation according to a desired pattern; a substrate table configured to hold a substrate; a projection system adapted to project the patterned beam onto a target portion of the substrate; a liquid supply system configured to at least partly fill a space between the projection system and an object on the substrate table, with a liquid; and a sensor configured to be in contact with the liquid capable of being positioned to be illuminated by a beam of radiation from the projection system or an alignment system once it has passed through the liquid, the substrate table having an edge seal member configured to at least partly surround an edge of the sensor and having a primary surface facing the projection system substantially co-planar with a primary surface of the sensor.