Apertures

Platinum and Molybdenum Disc Apertures

Material Cambridge Cambridge Nanoquest Zeiss Zeiss
HoleSize 2x.5mmPT 2x.5mm Moly 2x.5mm PT 3x.12mm PT 3x.12mm Moly
- - - - -
10µ B10155 - POR B10215 - POR - - -
15µ - - - - -
20µ B10160 - $100.00 B10220 - $95.00 - - -
25µ B10165 - $96.00 B10225 - $91.00 - - -
30µ B10170 - $92.00 B10230 - $91.00 B10275 - $96.00 B10290 - $96.00 B10325 - $91.00
40µ - - - - -
50µ B10175 - $92.00 B10235 - $87.00 B10280 - $92.00 - -
60µ -   -   -
70µ B10180 - $92.00 B10240 - $87.00 - - -
90µ - - -   -
100µ B10185 - $92.00 B10245 - $87.00 B10285 - $92.00 B10305 - $92.00 B10340 - $87.00
150µ - - - - -
200µ B10190 - $92.00 B10250 - $87.00 - B10310 - $92.00 B10345 - $87.00
300µ B10195 - $92.00 B10255 - $87.00 - B10315 - $92.00 B10350 - $87.00
400µ     - B10320 - $92.00 B10355 - $87.00
500µ B10205 - $92.00 B10265 - $87.00 - - -
750µ B10210 - $92.00 - - - -
800µ - - - - -

Platinum and Molybdenum Disc Apertures

Material AMRAY Philips Philips
HoleSize 3x.25mm PT 3x.25mm PT 3x.25mm Moly
- - -
10µ - - B10480 -   POR
15µ - - B10485 - $101.00
20µ - B10405 - $100.00 B10490 - $95.00
25µ - B10410 - $96.00 B10495 - $91.00
30µ - B10415 - $96.00 B10500 - $91.00
40µ - - -
50µ B10360 - $92.00 B10425 - $92.00 B10510 - $87.00
60µ - - -
70µ - B10435 - $92.00 B10520 - $87.00
90µ - - -
100µ B10365 -   POR B10440 - $92.00 B10525 - $87.00
150µ B10370 - $92.00 B10445 - $92.00 B10530 - $87.00
200µ B10375 - $92.00 B10450 - $92.00 B10535 - $87.00
300µ B10380 - $92.00 B10455 - $92.00 B10540 - $87.00
400µ - B10460 - $92.00 B10545 - $87.00
500µ B10385 - $92.00 B10465 - $92.00 B10550 - $87.00
750µ - B10470 - $92.00 B10555 - $87.00
800µ - B10475 - $92.00 B10560 - $87.00

Cambridge Spray Apertures

Spray apertures are available in two diameters (10.5mm and 12.5mm) and in platinum or molybdenum. These apertures are not counterbored.

500µ 1000µ Size Material
B10800 - $92.00 B10805 - $92.00 10.5x.25mm Pt
B10810 - $126.00 B10815 - $126.00 10.5x.25mm Moly
B10820 - $143.00 B10825 - $143.00 12.5x.25mm Pt
B10830 - $127.00 B10835 - $127.00 12.5x.25mm Moly

Cameca Platinum Disc Apertures

Cat # Size Type Hole Size Price
B10900 5.9 x .1mm 45É Mirror 800µ POR
B10905 11.9 x .1mm Beam Regulation 150µ POR
B10910 11.9 x .1mm Beam Regulation 300µ POR
B10915 11.9 x .25mm Wehnelt Cylinder 1000µ POR

Strip Apertures

Many models of SEM and TEM now use multiÇhole strip apertures in place of singleÇhole aperture discs. Strip apertures are custom drilled to your specifications in platinum or molybdenum.

  • How to order
  • - Designate make and model number of electron microscope
  • - Strip size (length x width x thickness)
  • - Number of holes and hole sizes required
Cat # Description Price
B11000 Hitachi Platinum Strip Aperture POR
B11005 Hitachi Molybdenum Strip Aperture POR
B11010 ISI Platinum Strip Aperture POR
B11015 ISI Molybdenum Strip Aperture POR

Gold Foil Apertures

The main advantage of using a gold foil, or thin film, aperture is that it heats up sufficiently in the path of the electron beam to prevent deposition of contaminants. Gold foil apertures are used in the objective or intermediate lens, and not in the condenser lens. The manufacturing process ensures that a single, round and wellÇcentered hole is produced each time. In practical terms, this means working with a microscope for many weeks without noticeable change in astigmatism, without risk of contamination by frequent air admittance into the column and without the frequent chemical or physical cleaning required with conventional drilled apertures.

Gold Foil Aperture Tolerances

Nominal Hole Size (µ) Tolerance
1Ç10 ±1µ
15 14Ç16
20 19Ç21
25 24Ç26
30 29Ç31
35 34Ç36
40 38Ç42
50 48Ç52
60 57Ç63
70 and over ±10%

Gold foil apertures are packed, shipped and stored in specially designed containers with shallow conical depressions in the body of the container and a simple flat cover plate which prevents the apertures from flipping over and protects them from foil damage.

Hole Size Philips 3x.25mm Siemens 2x.5mm Zeiss 3x.12mm
B20000 - POR   -
B20005 - POR   -
B20010 - POR   -
B20015 - POR   -
B20020 - $324.00 B20200 - $347.00 -
B20025 - POR   -
10µ B20030 - POR B20205 - $270.00 B20300 - $375.00
15µ B20035 - POR B20210 - $270.00 -
20µ B20040 - $375.00 B20215 - $200.00 B20305 - $235.00
25µ B20045 - POR   -
30µ B20050 - POR B20220 - $165.00 B20310 - $172.00
35µ B20055 - POR   -
40µ B20060 - POR B20225 - $158.00 -
50µ B20065 - POR B20230 - $158.00 B20315 - $158.00
60µ B20070 - POR   B20320 - $158.00
70µ B20075 - POR B20235 - $158.00 -
80µ B20080 - POR   -
90µ B20085 - POR   B20330 - $158.00
100µ B20090 - POR B20240 - $158.00 -
150µ B20095 - POR B20245 - $158.00 -
200µ B20100 - POR B20250 - $158.00 -
300µ B20105 - POR B20255 - $158.00 -
400µ B20110 - POR   B20335 - $158.00

Wehnelt (Gun Cap) Apertures

Available in seven different hole sizes, all punched from .004" tantalum foil.

For AMRAY and Philips Instruments (500µ is standard size for AMRAY; smaller hole sizes may improve performance in Philips electron guns).

Cat # Description Size Price
B30000 Wehnelt Aperture 200µ hole $229.00
B30005 Wehnelt Aperture 300µ hole $229.00
B30010 Wehnelt Aperture 400µ hole $229.00
B30015 Wehnelt Aperture 500µ hole $229.00

For ElectroScan and Nanoquest (Vickers) Instrument

Cat # Description Size Price
B30020 Wehnelt Aperture 750µ hole $229.00
Cat # Description Size Price
B30025 Wehnelt Aperture 1000µ hole $229.00
B30030 Wehnelt Aperture 1200µ hole $229.00

Special, larger diameter hole sizes

Aperture Flamers

Small Aperture Flamer

For holding aperture disc or strips while flaming. Disc apertures up to 4 mm can be flamed in the 3/16" diameter cup. The cup is manufactured from 6 mil platinum foil, with a 1/32" diameter hole in the bottom to induce a good air flow. The cup is attached by a 30 mil platinum wire to a heat resistant handle. Aperture strips can be hung from the hook for flaming.

Cat # Description Price
B40000 Small Aperture Flamer $563.00

Large Aperture Flamer

Disc Apertures larger than 6 mm, including spray apertures 10.5 mm and 12.5 mm O.D., can be flamed in the flat pan. The pan is made from 6 mil platinum foil, with a 1/32" diameter hole in the bottom to induce an adequate air flow. A 30 mil platinum wire attaches the pan to a heat resistant handle.

Cat # Description Price
B40100 Large Aperture Flamer $699.00

Platinum Micro Dishes (Boats)

For holding platinum apertures while flaming.

Cat # Description Size Price
B40300 Micro Dish 10mm dia. x 2mm deep $423.10
B40400 Donau Micro Dish 15mm diameter with handle $801.80

To Extend Aperture Life

  1. Suspend platinum or molybdenum strip or disc in 250 ml beaker of AR Grade Acetone. Stand beaker in about one inch of water in ultrasonic bath.
  2. Vibrate in ultrasonic unit for 60 seconds.
  3. Remove aperture from acetone and be sure solvent is completely evaporated from strip or disc.
  4. Place Platinum Disc in cup of flamer or hang Platinum Strip from hook on flamer. Flame in a carbonÇfree flame (e.g. BernzÇoÇmatic torch), to cherry red. Hold in flame for less than 30 seconds.

or

Place Molybdenum Disc or Strip in a tungsten boat in a vacuum evaporator. When good vacuum is obtained, fire boat to cherry red, not whiteÇheat. Let boat cool before removing from vacuum.

All prices are in Canadian Dollars. To request a price quotation or for other inquiries, please contact us.