Influence of dynamic sub-pixelation on exposure intensity distribution under diffraction effects in spatial light modulation based lithography
In lithography using spatial light modulators, the irradiance is influenced by diffraction effects. The intensity distribution under diffraction effects due to binary reflections is investigated. Dynamic sub-pixelation, a method of dividing an image pixel reflected off a single micromirror into equal-sized sub-pixels on a translating substrate by the superposition of an array of image pixels, is proposed to enhance image resolution. The influence of dynamic sub-pixelation on exposure intensity distribution under diffraction effects is analyzed. The potential of utilizing dynamic sub-pixelation for suppressing diffraction effects and further enhancing image resolution while maintaining throughput is demonstrated through simulations and experiments.
sub-pixelation exposure intensity distribution diffraction effect spatial light modulation