Apertures and Aperture Cleaning
Self Cleaning Gold Foil Disc Apertures
Advanced techniques of thin metal film application permits the apertures
to retain a clean hole edge during prolonged beam exposure. Ultra-thin,
half-micron design discourages contaminant accumulation and stabilizes
astigmatic conditions to provide longer life. Conventional mechanical
cleaning involving costly down-time is no longer necessary. Because
the foil is ultra thin, care must be taken when handling the gold foil
apertures.
Gold foil aperture tolerances vary as follow:
- Nominal hole size from 1 to 60 micron: +/-1micron
- Nominal hole size 70 micron and up: +/-10%
Platinum Disc, Drilled Apertures
Platinum apertures are easily cleaned by either an aperture flamer or over a bunsen burner in the open air. We maintain a wide variety of Platinum Drilled Apertures in stock with different configurations suiting all of your needs.
Platinum Apertures size tolerances vary as follow:
- Nominal hole diameter: +/- 1 micron
- Disc diameter: +/- 10 microns
- Disc thickness: +/- 10 microns
Ordering information: Gold (Au); Platinum (Pt)
Hole Sizes not listed are available upon special request.


Wehnelt Apertures
Made from 0.004" tantalum foil. Replaceable tantalum apertures for some microscopes (Amray and Philips). They improve the performance of the electron gun.

Strip Aperture
All the following multihole strip aperture are made from Platinum-Iridium (95:5) and are standard in our line.
HITACHI Strip Apertures
Measures: 41.0 x 4.0 x 0.10mm – 4 holes
Measures: 45.0 x 4.0 x 0.10mm – 4 holes
| 49212-01 | Hole Sizes: 20-20-30-30µm | each | 516.00 | |
| 49212-02 | Hole Sizes: 30-70-100-200µm | each | 516.00 | |
| 49212-03 | Hole Sizes: 10-30-50-70µm | each | 542.00 |
JEOL Strip Apertures
Measures: 9.0 x 2.35 x 0.10mm – 3 holes
| 49210-01 | Holes Sizes: 10-30-80µm | each | 460.00 | |
| 49210-02 | Hole Sizes: 10-20-100µm | each | 460.00 | |
| 49210-03 | Hole Sizes: 30-50-150µm | each | 430.00 | |
| 49210-04 | Hole Sizes: 100-200-300µm | each | 430.00 |
Other Strip Apertures
Measures 10.0 x 2.5 x 0.10mm – 3 holes
| 49213-01 | Hole Sizes: 20-60-100µm | each | 430.00 |
Measures 31.0 x 5.0 x 0.10mm – 4 holes
| 49214-01 | Hole Sizes: 20-30-30-50µm | each | 500.00 |
Note: These are our standard strip apertures. For all other strip apertures or any custom made ones please inquire.
Metal Foils
For aperture cleaning, vacuum evaporation.
| 73820 | Molybdenum foil, 0.002” thick, (0.05mm); 6x6”(15.2 x 15.2 cm) | each | 46.00 | |
| 73822 | Tantalum Foil, 0.003” thick, (0.075mm);6x6" | each | 200.00 |


Aperture Flamer
For holding aperture discs or strips while flaming. Small discs can be flamed in the 3/16" diameter cup made from 6 mil platinum foil with a 1/32" diameter hole in the bottom to induce a good flow of air. The cup is attached by a 30 mil platinum wire to a heat resistant handle. The aperture can be hung from the hook for flaming.
For holding ¼" to ½" diameter aperture discs while flaming. The flat pan is made from 6 mil platinum foil with a 1/32" diameter hole in the bottom to induce adequate air flow. A 30 mil platinum wire attaches the pan to a heat resistant handle.
| 40001 | Aperture Flamer, discs or strips | each | 415.00 | |
| 40002 | Aperture Flamer, ¼" to ½" discs | each | 438.00 |

Metal Boats
For disc aperture cleaning, vacuum evaporation.
Thickness: 0.05mm (0.002") Overall length: 75mm (3")
Trough Measures: 12mm(1.2")long x 5mm (3/16")wide x
1mm deep
| 73810 | Molybdenum Boat | 5/pk | 29.50 | |
| 73812 | Platinum Boat | 1/pk | 149.00 | |
| 73814 | Tantalum Boat | 5/pk | 48.00 |
Metal Wires
Please see our complete line.

Molybdenum
Boat for Strip Apertures
Thickness: 0.05mm (0.002") Overall Length: 75mm
Trough Measures: 50mm (L) x 5mm (W) x 1mm (D)
| 73818 | Long Molybdenum Boat | 5/pk | 25.00 |

Tungsten Boat:
Thickness: 0.05mm (0.002") Overall Length: 32mm (¼")
Trough measures: 12mm (½") long x 5mm (3/16") wide x 1mm deep
| 73816 | Tungsten Boat | 5/pk | 33.50 |
Tungsten Wire Baskets
Please see listing in Evaporation Supplies.

