Electroformed aperture strips

Aperture strips with hole dimensions of less than 10µm are extremely difficult to produce by conventional mechanical methods.
By using lithography techniques, holes as small as 5µm are possible. Such strips are made of copper and can be coated with a thin layer of gold or platinum.

Experience shows that these apertures have a long lifetime in the electron microscope. 
Other designs are available to fit Hitachi, ISI/ABT/Topcon and FEI/Philips instruments.

Alternatively, multi-hole strips can be made to a particular specification.
Please ask for details.