Patent ID: 9740112
Date: 2017-08-22
CPC Classifications: G03F

Claim:
1. A patterning device support comprising: a moveable component configured to move a patterning device and having a surface that supports the patterning device; a clamping interface disposed on the moveable component, the clamping interface having one or more openings and being configured to apply a negative pressure on a surface of the patterning device via the one or more openings, such that the patterning device is coupled to the moveable component; a pressure applying interface on the movable component, the pressure applying interface being configured to apply an area of positive pressure on the surface of the patterning device via the one or more openings of the clamping interface; and a first constraint device, separate from the clamping interface, configured to substantially prevent movement of the patterning device in a plane substantially parallel with the surface that supports the patterning device, wherein the patterning device support is configured to apply the area of positive pressure before applying the negative pressure such that a friction force between the patterning device and the surface of the movable component that supports the patterning device is reduced.