We have a wide range of high-quality disc apertures for use in electron microscopes, Focus Ion Beam, microprobe and X-ray systems.
These apertures are manufactured to tight tolerances with precision drilled holes.
They are usually made from a platinum/iridium alloy 95:5% or molybdenum, although tantalum can be supplied for some applications. Platinum apertures can be made with hole sizes down to 5 m diameter whereas the smallest size for molybdenum is 10 m.
We also have apertures for systems that are no longer manufactured but are still in use.
Please note: molybdenum forms an oxide layer when stored for long periods.
We can therefore guarantee the material for no longer than 4 – 6 weeks.
The apertures can also be used for non-electron microscopy applications where precision small holes are required for light optics, gas and liquid flow purposes.
Non-standard sizes can be supplied to special order.
| Tolerances | |
| Disc diameter: | +0/-0.02mm |
| Thickness: | +0/-0.02mm |
| Hole size: | 5 – 10 m: 1 m |
| 11 – 70 m: 2 m | |
| 71 – 300 m: 5 m | |
| 301 – 1000 m: 10 m | |
| Capillary length: | 1/2 hole diameter for 10 – 200 m |
| <100 m for larger holes | |
| Roundness of hole: | 0.1 m for holes 5 – 10 m |
| 1 m for holes 11 – 200 m | |
| 2 m for holes over 200 m | |
| Centring of hole: | 0.02mm for diameter up to 7mm |
| 0.03mm for diameter 7 – 30mm |