Patent ID: 9575406
Date: 2017-02-21
CPC Classifications: G03F,Y10T

Claim:
1. A lithographic apparatus comprising: a carbon dioxide supply system to provide carbon dioxide from a source to a first gas outlet; a fluid handling system to provide a liquid to a space between a final element of a projection system and a facing surface and having the first gas outlet to supply a gas flow radially outward of a meniscus of liquid in the space; a second gas outlet radially outward of the first gas outlet to supply a flow of temperature conditioned gas, separate from the carbon dioxide supply, onto an object; and a control system comprising a sensor to detect flow and/or pressure at or upstream of the second gas outlet, the control system configured to stop the supply of the gas flow radially outward of the meniscus of liquid if a signal from the sensor indicates that flow and/or pressure at or upstream of the second gas outlet is below a certain magnitude.