Transmission Electron Microscope (TEM) Apertures

Agar Scientific offers a range of thin foil apertures and disc apertures for use in X-ray systems, electron microscopes, and FIB systems.

High-quality disc apertures are produced to tight tolerances with accurate drilled holes. They are often made from molybdenum or platinum/iridium alloy 95:5%. For certain applications, tantalum can be supplied. Platinum apertures can be made with hole sizes as small as 5µm in diameter, whilst the smallest size for molybdenum is 10µm.

Agar thin film apertures have the benefit of heating up in the beam and are effectively self-cleaning. They are often utilized in the objective lenses of electron beam lithography instruments.

Made to exceptionally high standards, Agar apertures are only accepted following examination in the TEM to verify the perfection of the hole’s edge and absence of pin holes in the vicinity.

Agar Scientific offers all the regularly used aperture sizes with disc thicknesses and diameters to suit today’s EM systems. The company also stocks apertures for systems which are no longer produced but are still in use.

Key Features

The main features of Agar's transmission electron microscope (TEM) apertures are:

  • High quality
  • Self-cleaning
  • Manufactured to tight tolerances with precision drilled holes
  • Aperture size ranges from 1.85 x 0.1mm to 4.0 x 0.2mm diameter
  • Can also be used for non-electron microscopy applications
  • Non-standard sizes available on special request

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