DRIE, ICP RIE, XeF2 dry silicon isotropic, or wet chemical acid/base thick or thin film etching
How to Have Your Thin Film or Substrate Etched/Patterned
Contact Nanofab Cleanroom staff with etching details (material to be etched, etch depth, substrate/part material and size and quantity, any lithography needed) https://www.nanofab.utah.edu/lab-staff/#process (Brian Baker)
Staff will examine your requirements and give you an estimate for etching/patterning time and cost