Patent ID: 9182222
Filing Date: 2015-11-10
Classification: G01B,G03F

Abstract:
1. A lithographic projection apparatus comprising: a substrate table configured to hold a substrate, the substrate table having a depression configured to receive the substrate; a projection system configured to project a patterned beam onto a target portion of the substrate; a liquid supply system configured to provide a liquid, through which the patterned beam is to be projected, in a space between the projection system and the substrate; a sensor system configured to measure a position of the substrate or of another substrate, a sensor system configured to measure a gap between an edge of the substrate, or of another substrate, disposed inside the depression and an edge of the depression, or a sensor system configured to measure both the position and the gap; and a substrate handling system configured to position, using the measurement by the sensor system or a parameter derived from the measurement, the substrate inside the depression such that the gap between the edge of the substrate and the edge of the depression is substantially uniform inside the depression.