LITHOGRAPHIC APPARATUS AND ELECTROSTATIC CLAMP DESIGNS
Abstract:
Embodiments herein describe methods, devices, and systems for reducing an electric field at a clamp-reticle interface using an enhanced electrostatic clamp. In particular, the electrostatic clamp includes a clamp body, an electrode layer disposed on a top surface of the clamp body, and a plurality of burls that project from a bottom surface of the clamp body, wherein the electrode layer comprises a plurality of cutouts at predetermined locations that vertically correspond to locations of the plurality of burls at the bottom surface of the clamp body.
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