Advanced techniques for programmable photolithography provide enhanced
resolution and can image features smaller than the single shutter
intensity profile, i.e., sub-pixel resolution. Patterns are built up by
multiple exposures with relative movement of the mask and resist so as to
place each shape from the library where it is needed on the resist.
Electro-Optic phase shifting material may be applied to the shutter so as
to adjust the single shutter intensity profile, or to adjust the
interaction of adjacent shutters. An apodizing mask may be used to
engineer the wavefronts of the light striking the resist to achieve
better resolution.