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agar manufactured

Thin Foil Apertures

Thin foil apertures are frequently used in the objective lenses of high resolution and electron beam lithography instruments.

Special prices valid while stocks last. 

All prices exclude VAT.
Name & Code
Grouped product items
Code & DescriptionAvailabilityPriceQty
AGA07210
Thin Foil Aperture 2mm dia, 0.25mm thick, Hole 10um
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£131.19
£131.19
AGA07220
Thin Foil Aperture 2mm dia, 0.25mm thick, Hole 20um
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£131.19
£131.19
AGA07230
Thin Foil Aperture 2mm dia, 0.25mm thick, Hole 30um
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£131.19
£131.19
AGA07240
Thin Foil Aperture 2mm dia, 0.25mm thick, Hole 40um
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£111.50
£111.50
AGA07250
Thin Foil Aperture 2mm dia, 0.25mm thick, Hole 50um
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£111.50
£111.50
AGA07260
Thin Foil Aperture 2mm dia, 0.25mm thick, Hole 60um
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£111.50
£111.50
AGA07270
Thin Foil Aperture 2mm dia, 0.25mm thick, Hole 70um
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£111.50
£111.50
AGA07201
Thin Foil Aperture 2mm dia, 0.25mm thick, Hole 100um
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£111.50
£111.50
AGA07202
Thin Foil Aperture 2mm dia, 0.25mm thick, Hole 200um
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£111.50
£111.50
AGA07320
Thin Foil Aperture 3.04mm dia x 0.25mm thick, Hole 20um
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Special Price £75.25 was £131.19 You save: £67.13 (43%)
Special Price £75.25 was £131.19 You save: £67.13 (43%)
AGA07330
Thin Foil Aperture 3.04mm dia x 0.25mm thick, Hole 30um
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£131.19
£131.19
AGA07340
Thin Foil Aperture 3.04mm dia x 0.25mm thick, Hole 40um
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£111.50
£111.50
AGA07350
Thin Foil Aperture 3.04mm dia x 0.25mm thick, Hole 50um
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£111.50
£111.50
AGA07360
Thin Foil Aperture 3.04mm dia x 0.25mm thick, Hole 60um
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£111.50
£111.50
AGA07370
Thin Foil Aperture 3.04mm dia x 0.25mm thick, Hole 70um
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£111.50
£111.50
AGA07370-2
Thin Foil Aperture 3.04mm dia x 0.25mm thick, Hole 70um, Pack of 2
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£223.00
£223.00
AGA07301
Thin Foil Aperture 3.04mm dia x 0.25mm thick, Hole 100um
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£111.50
£111.50
AGA07302
Thin Foil Aperture 3.04mm dia x 0.25mm thick, Hole 200um
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£111.50
£111.50
Product Description

Thin foil apertures are frequently used in the objective lenses of high resolution and electron beam lithography instruments. These apertures have the advantage that they heat up in the beam and are effectively self-cleaning. This minimises astigmatism caused by a build-up of carbon contamination. The small amount of contamination that deposits after a lengthy operation may be removed by heating the aperture strongly for a short time with the focused electron beam. The benefits of using this type of aperture are particularly apparent when operating at low accelerating voltages or with small probe sizes.

Thin foil 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 diameter is ±10%. Agar apertures are made to exceptionally high standards and are only accepted after individual inspection to check the perfection of the edge of the hole, its roundness and absence of pinholes in the vicinity.

Other specific apertures and diameters can also be manufactured, please enquire with details of your application.

Delivery & Returns
PRICE & AVAILABILITY: Please note that while we are working closely with our suppliers to minimise any global supply chain issues, prices and availability may be subject to change at short notice.