ARC possesses the machining equipment and skill to fabricate a wide variety of apertures in a similarly wide variety of materials. The aspect ratio of aperture opening to material thickness is generally limited to a 20:1 aspect ratio. Shown on the right in Figure 1 is an aperture with a wide series of holes ranging from 15 µm to 960 µm.
Aperture construction varies from a free-standing foil aperture where the aperture holes range from tens of nanometers to millimeters and material thicknesses range from sub-micron foil to tens of millimeters.
Figure 2 (right) illustrates a 30 nm thin foil with a 5 nm diameter hole. This was accomplished with proprietary techniques.