Patent ID: 9158206
Filing Date: 2015-10-13
Classification: G03F

Abstract:
1. An immersion type lithographic apparatus comprising: a projection system configured to project a beam of radiation onto a substrate; an immersion system configured to at least partially fill an immersion space with an immersion liquid, the immersion system comprising a liquid confinement structure configured to at least partly constrain the immersion liquid in the immersion space, the liquid confinement structure comprising an inlet configured to supply immersion liquid to the immersion space and an outlet configured to remove immersion liquid from the immersion space, the outlet extending around a path of the beam of radiation through the immersion space; and a liquid supply system configured to provide a cleaning liquid to the immersion space, the liquid supply system comprising a source for the cleaning liquid or a control system to generate the cleaning liquid from components, wherein the cleaning liquid comprises water containing hydrogen peroxide and ozone at a concentration ratio of hydrogen peroxide to ozone selected from between 0.2:1 to 0.5:1, wherein the ozone has a concentration selected from 0.1 ppm to 20 ppm.