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Apertures
SEM apertures enable users to create high-quality imaging of a variety of sample types by refining and customizing the properties of an SEM’s electron beam. Similar in purpose to an optical microscope aperture, the apertures utilized in SEM are engineered to provide users with the control to create optimal conditions for SEM imaging.
SEMs employ apertures at several different stages of the imaging process, and at EMS, we carry a broad selection of SEM apertures to accommodate your needs. From Wehnelt apertures used to control the emission of electrons directly from the cathode to disc apertures that help control the angular range of signals and influence critical image elements like resolution and contrast, choosing the right SEM aperture can make or break the quality of your image. Since maintaining the integrity of your aperture is paramount, we also carry several products designed to facilitate aperture upkeep and cleaning, including aperture flamers.
View the Apertures
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Product Name
Ordering Info
| Cat # | Description | Pack | Price | Quote | Quantity | |
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| Cat #: 40010-Mo | Description: Aperture Mo 10µm 2mm O.D. X 0.24mm Thick | Pack: Each | Price: $263.00 |
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| Cat #: 40020-Mo | Description: Aperture Mo 20µm 2mm O.D. X 0.24mm Thick | Pack: Each | Price: $95.50 |
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| Cat #: 40030-Mo | Description: Aperture Mo 30µm 2mm O.D. X 0.24mm Thick | Pack: Each | Price: $91.00 |
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| Cat #: 40050-Mo | Description: Aperture Mo 50µm 2mm O.D. X 0.24mm Thick | Pack: Each | Price: $82.50 |
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| Cat #: 40100-Mo | Description: Aperture Mo 100µm 2mm O.D. X 0.24mm Thick | Pack: Each | Price: $80.50 |
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| Cat #: 40150-Mo | Description: Aperture Mo 150µm 2mm O.D. X 0.24mm Thick | Pack: Each | Price: $79.50 |
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| Cat #: 45010-Mo | Description: Aperture Mo 10µm 4mm O.D. X 0.165mm Thick | Pack: Each | Price: $263.00 |
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| Cat #: 45020-Mo | Description: Aperture Mo 20µm 4mm O.D. X 0.165mm Thick | Pack: Each | Price: $130.50 |
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| Cat #: 45030-Mo | Description: Aperture Mo 30µm 4mm O.D. X 0.165mm Thick | Pack: Each | Price: $102.00 |
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| Cat #: 45050-Mo | Description: Aperture Mo 50µm 4mm O.D. X 0.165mm Thick | Pack: Each | Price: $99.50 |
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| Cat #: 45070-Mo | Description: Aperture Mo 70µm 4mm O.D. X 0.165mm Thick | Pack: Each | Price: $99.50 |
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| Cat #: 45100-Mo | Description: Aperture Mo 100µm 4mm O.D. X 0.165mm Thick | Pack: Each | Price: $85.00 |
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| Cat #: 46010-Mo | Description: Aperture Mo 10µm 6mm O.D. X .24mm Thick | Pack: Each | Price: $263.00 |
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| Cat #: 46020-Mo | Description: Aperture Mo 20µm 6mm O.D. X .24mm Thick | Pack: Each | Price: $175.00 |
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| Cat #: 46030-Mo | Description: Aperture Mo 30µm 6mm O.D. X .24mm Thick | Pack: Each | Price: $158.00 |
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| Cat #: 46050-Mo | Description: Aperture Mo 50µm 6mm O.D. X .24mm Thick | Pack: Each | Price: $158.00 |
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| Cat #: 46100-Mo | Description: Aperture Mo 100µm 6mm O.D. X .24mm Thick | Pack: Each | Price: $158.00 |
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| Cat #: 47030-Mo | Description: Aperture Mo 10µm 6.35mm O.D. X 0.06mm Thick | Pack: Each | Price: $263.00 |
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| Cat #: 47050-Mo | Description: Aperture Mo 50µm 6.35mm O.D. X 0.06mm Thick | Pack: Each | Price: $158.00 |
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| Cat #: 47100-Mo | Description: Aperture Mo 100µm 6.35mm O.D. X 0.06mm Thick | Pack: Each | Price: $126.00 |
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| Cat #: 47150-Mo | Description: Aperture Mo 150µm 6.35mm O.D. X 0.06mm Thick | Pack: Each | Price: $126.00 |
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| Cat #: 47200-Mo | Description: Aperture Mo 200µm 6.35mm O.D. X 0.06mm Thick | Pack: Each | Price: $126.00 |
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| Cat #: 47500-MoS | Description: Aperture Mo 500µm 6.35mm O.D. X 0.14mm Thick | Pack: Each | Price: $140.00 |
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| Cat #: 471000-MoS | Description: Aperture Mo 1000µm 6.35mm O.D. X 0.14mm Thick | Pack: Each | Price: $140.00 |
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| Cat #: 48500-MoS | Description: Aperture Mo 500µm 12.7mm O.D. X 0.25mm Thick | Pack: Each | Price: $140.00 |
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| Cat #: 481000-MoS | Description: Aperture Mo 1000µm 12.7mm O.D. X 0.25mm Thick | Pack: Each | Price: $140.00 |
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| Cat #: 42005-Mo | Description: Aperture Mo 5µm 2mm O.D. X 0.53mm Thick | Pack: Each | Price: $263.00 |
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| Cat #: 42010-Mo | Description: Aperture Mo 10µm 2mm O.D. X 0.53mm Thick | Pack: Each | Price: $263.00 |
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| Cat #: 42015-Mo | Description: Aperture Mo 15µm 2mm O.D. X 0.53mm Thick | Pack: Each | Price: $96.50 |
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| Cat #: 42020-Mo | Description: Aperture Mo 20µm 2mm O.D. X 0.53mm Thick | Pack: Each | Price: $96.50 |
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| Cat #: 42030-Mo | Description: Aperture Mo 30µm 2mm O.D. X 0.53mm Thick | Pack: Each | Price: $92.00 |
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| Cat #: 42040-Mo | Description: Aperture Mo 40µm 2mm O.D. X 0.53mm Thick | Pack: Each | Price: $92.00 |
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| Cat #: 42050-Mo | Description: Aperture Mo 50µm 2mm O.D. X 0.53mm Thick | Pack: Each | Price: $82.50 |
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| Cat #: 42070-Mo | Description: Aperture Mo 70µm 2mm O.D. X 0.53mm Thick | Pack: Each | Price: $82.50 |
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| Cat #: 42100-Mo | Description: Aperture Mo 100µm 2mm O.D. X 0.53mm Thick | Pack: Each | Price: $80.50 |
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| Cat #: 43010-Mo | Description: Aperture Mo 10µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $263.00 |
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| Cat #: 43020-Mo | Description: Aperture Mo 20µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $105.00 |
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| Cat #: 43030-Mo | Description: Aperture Mo 30µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $99.50 |
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| Cat #: 43050-Mo | Description: Aperture Mo 50µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $95.50 |
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| Cat #: 43060-Mo | Description: Aperture Mo 60µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $95.50 |
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| Cat #: 43070-Mo | Description: Aperture Mo 70µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $95.50 |
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| Cat #: 43100-Mo | Description: Aperture Mo 100µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $95.50 |
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| Cat #: 43150-Mo | Description: Aperture Mo 150µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $93.50 |
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| Cat #: 43200-Mo | Description: Aperture Mo 200µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $93.50 |
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| Cat #: 43300-Mo | Description: Aperture Mo 300µm 3mm O.D. X 0.12mm Thick | Pack: Each | Price: $93.50 |
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| Cat #: 44005-Mo | Description: Aperture Mo 5µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $315.00 |
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| Cat #: 44010-Mo | Description: Aperture Mo 10µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $263.00 |
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| Cat #: 44015-Mo | Description: Aperture Mo 15µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $99.50 |
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| Cat #: 44020-Mo | Description: Aperture Mo 20µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $99.50 |
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| Cat #: 44025-Mo | Description: Aperture Mo 25µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $95.50 |
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| Cat #: 44030-Mo | Description: Aperture Mo 30µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $95.50 |
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| Cat #: 44040-Mo | Description: Aperture Mo 40µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $82.50 |
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| Cat #: 44050-Mo | Description: Aperture Mo 50µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $86.00 |
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| Cat #: 44060-Mo | Description: Aperture Mo 60µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $83.50 |
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| Cat #: 44070-Mo | Description: Aperture Mo 70µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $83.50 |
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| Cat #: 44100-Mo | Description: Aperture Mo 100µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $81.50 |
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| Cat #: 44150-Mo | Description: Aperture Mo 150µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $81.50 |
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| Cat #: 44200-Mo | Description: Aperture Mo 200µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $81.50 |
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| Cat #: 44300-Mo | Description: Aperture Mo 300µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $81.50 |
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| Cat #: 44400-Mo | Description: Aperture Mo 400µm 3mm O.D. X 0.24mm Thick | Pack: Each | Price: $81.50 |
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| Cat # | Description | Pack | Price | Quote | Quantity | |
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| Cat #: 73820 | Description: Molybdenum Foil, 6X6" Sheet | Pack: Each | Price: $106.00 |
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| Cat #: 73822 | Description: Tantalum Foil, 6X6" Sheet | Pack: Each | Price: $274.50 |
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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.
| Cat # | Description | MSDS | Pack | Price | Quote | Quantity | |
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| Cat #: 73810 | Description: Molybdenum Boat | MSDS | Pack: 5 Pack | Price: $34.00 |
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| Cat #: 73812 | Description: Platinum Boat | Pack: Each | Price: $174.00 |
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| Cat #: 73814 | Description: Tantalum Boat | MSDS | Pack: 5 Pack | Price: $56.00 |
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Molybdenum Boat for Strip Apertures
Thickness: 0.05mm (0.002"), overall length: 75mm, trough measures: 50mm (L) x 5mm (W) x 1mm (D).
| Cat # | Description | Pack | Price | Quote | Quantity | |
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| Cat #: 73818 | Description: Long Molybdenum Boat | Pack: 5 Pack | Price: $34.00 |
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