Patent ID: 11947271
Assignee: KULICKE & SOFFA LITEQ B.V.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. A lithographic system for projecting an image onto a workpiece using radiation, the lithographic system comprising:
a support structure for supporting a workpiece;
a radiation source for providing radiation to project an image on the workpiece;
a reticle positioned between the radiation source and the workpiece; and
a mask being positioned within 100 mm of the reticle along a z-axis of the lithographic system, the mask being configured to block radiation from the radiation source, wherein the mask includes a body portion and a radiation absorbing coating applied to at least a portion of an external surface of the body portion, wherein the radiation absorbing coating is an inorganic black coating, the mask defining an illumination area of the image to be projected onto the workpiece using a pattern of the reticle and radiation from the radiation source, the mask including a plurality of elements configured to define the illumination area, wherein at least one of the plurality of elements is positioned above the reticle along the z-axis of the lithographic system, and at least one other of the plurality of elements is positioned below the reticle along the z-axis of the lithographic system.