Patent ID: 9740106
Date: 2017-08-22
CPC Classifications: G01B,G03F

Claim:
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 substrate target portion; 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 table; a sensor system configured to measure a position of the substrate when disposed inside the depression, to measure a characteristic of a gap between an edge of the substrate when disposed inside the depression and an edge of the depression, or to measure both the position and the characteristic of the gap; and a substrate handling system configured to position, using the measurement by the sensor system or a parameter derived from the measurement, another substrate to 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.