Extreme UV diffraction grating fabricated by nanoimprint lithography
In this study, extreme ultraviolet (EUV) diffraction gratings were fabricated by nanoimprint lithography owing to its advantages of being low cost and high throughput. The imprinted SU-8 grating can function as the EUV diffraction grating directly without the need of the additional lift-off process. The patterning steps of grating pattern and stop layer were separated to enhance 0th order blocking capability of the stop layer. The exposure results of the one-dimensional 75 and 50nm half-pitch PMMA line/space patterns from the fabricated gratings were demonstrated.
diffraction grating nanoimprint euv interference lithography