Our ultra-thin film apertures offer
contamination free clean hole edge even a long beam exposure. These
apertures have the advantage that they heat up in the beam and are
effectively self cleaning. The small amount of contamination which deposits
after lengthy operation may be removed by heating the aperture strongly for
a short time with the focused electron beam.
Please Note:
Thin film apertures should not be used in the condenser lens as they may
melt. They are of course more fragile to handle and can be irreparably
damaged by abrasion or by a sudden rush of air in the vacuum system.
Normal
tolerance on hole size is +/- 10%
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