Patent ID: 7180081

Claim:
An EUV source debris shield comprising: a first debris shield member comprising: a first curvilinear surface having a first selected shape with respect to a first axis of rotation; a second curvilinear surface having the first selected shape with respect to the first axis of rotation and spaced intermediate the first curvilinear surface and the first axis of rotation; and, a plurality of aligned tubular openings in the debris shield member connecting the first curvilinear surface and the second curvilinear surface, and having an internal opening tapered toward a focal point on the first axis of rotation; and a second debris shield member comprising: a third curvilinear surface having the first selected shape with respect to the first axis of rotation and spaced intermediate the second curvilinear surface and the axis of rotation; a fourth curvilinear surface having the first selected shape with respect to the first axis of rotation and spaced intermediate the third curvilinear surface und the first axis of rotation; and, a plurality of aligned tubular openings in the debris shield member connecting the third curvilinear surface and the fourth curvilinear surface, and having an internal opening tapered toward a focal point on the first axis of rotation.