I might need to go to a metal shop/fabricator/what have you soon to have work done on a conceptually simple part that has some elements with measurements on the microscopic scale. Think cylinders with a diameter of .2 microns. Lots of them. I would want it done in aluminum. What would be the best way to go here? Can 3d printing accomplish such a feat yet? Should I be looking at CNC milling (and if so, what kind of tooling should I be looking for here)? I know work on this scale can be done - heck, they do 22nm silicon transistors, so surely they could do .2 micron cylinders in aluminum - but I'm not exactly sure by whom or how. Any clarification here would be of great help. Thanks!