Agar Scientific offers a broad variety of high quality disc apertures and thin foil apertures to be used in focus ion beam, electron microscope, microprobe and X-ray systems. Precision drilled holes are used to manufacture disc apertures to tight tolerances. Platinum apertures can be made with hole sizes down to 5μm in diameter, whereas the smallest size for molybdenum is 10μm.
Agar Scientific's thin film apertures are used frequently in the objective lenses of high resolution and electron beam lithography instruments. The benefit of these apertures is that they heat up in the beam and are effectively self-cleaning.
Agar apertures are manufactured to a high standar, and are only accepted after examination under TEM to check the perfection of the edge of the hole, its roundness and absence of pin holes in the vicinity.
Apertures by Agar are offered in the following sizes (available materials vary depending on the size):
- 1.85mm dia x 0.1mm
- 2.0mm dia x 0.1mm
- 3.00mm dia x 0.1mm
- 3.04mm dia x 0.25mm
- 4.00mm dia x 0.6mm
- 6.35mm dia x 0.125mm
- 10.0mm dia x 0.1mm
- 10.0mm dia x 0.6mm
- 12.0mm dia x 0.1mm
- 19.99mm dia x 0.25mm
The key features of Agar TEM apertures are:
- The apertures can also be used for non-electron microscopy applications where precision small holes are needed for light optics, gas and liquid flow purposes.
- Non standard sizes can be supplied to special order
- They are normally made from iridium/platinum alloy 95.5% or molybdenum although tantalum can be supplied for certain applications