The tungsten filaments manufactured by Energy Beam Sciences are used in all major brands of scanning and transmission electron microscopes. These high quality, high stability tungsten EM filaments, also called cathodes or electron emitters, are manufactured to excede the specifications of the original equipment manufacturers. These superior cathodes are made using high quality ceramic dics, exact size contact pins and high grade tungsten filament wire. Special tools are used to produce the correct shape of the tungsten filament. All EBSciences tungsten filaments are precisely aligned and annealed in high vacuum to reduce stress in the filament. This will guarantee optimum stability, maximum brightness, longer lifetime and overall lower running costs.
Exclusive features of the EBS tungsten EM filaments are:
Minimum tip radius for coherent beam
Rigid attachment of filament wire to post to increase stability
Fully stress relieved for enhanced cathode lifetime
Polished post ends
Precise dimensions
Better long term economy
Please consult the following table for the correct type of tungsten filament for your SEM, TEM or Microprobe. The EBS tungsten filaments are available for FEI, Hitachi, ISI, JEOL, Philips, Tescan, Zeiss, LEO, Cambridge Instruments, Leica, AmRay, Pemtron and CamScan Electron Microscopes.
AEI base Filaments compatible with Zeiss EVO, LEO, Leica, and Cambridge Instrument SEMs
Product #
Unit
MSFILWAEI
box/10
AmRay Filament for all AmRay, AMR and Leitz/AMR SEMs, except AMR 1200 series
Product #
Unit
14-AM1202
box/10
Coxem Filaments H1020 for Coxem SEMs
Product #
Unit
14-CX1212
box/10
FEI / Philips Filaments for FEI SEM/TEM and Philips PSEM 500 and later and Philips EM200 TEM and later
Product #
Unit
MSFILWF-10
box/10
Hitachi S-Type Filaments for S-, SU-, H- and X-Series SEM and TEM
Product #
Unit
14-HI1204
box/10
Hitachi S-Type pre-aligned Filaments with Metal Cartridge for S-3400N, S-3700N, SU-1500, SU-15210, SU-3500 and TM33030-3000-1000 series Table top SEM
Product #
Unit
14-HI1205
box/10
14-HT1205-1
each
ISI 2-Pin Filaments for ISI / ABT / Topcon SEM and ABT TEM
Product #
Unit
14-I21206
box/10
JEOL K-Type Filaments with Stainless Steel Alignment Ring for SEM and TEM
Product #
Unit
14-JL1208
box/6
Pemtron Filaments for Pemtron SEMs
Product #
Unit
14-PT1211
box/10
Tescan Filaments for Tescan SEMs and Camscan SEMs with new Tescan Columns
Product #
Unit
14-TN1209
box/10
14-TN1209-3
box/3
ZEISS Tungsten Filaments for Zeiss SEMs and TEMs
Product #
Unit
MSFILWZ-10
box/10
Electron Source Performance Table
The electron source performance table is provided to give additional information regarding the performance and requirements for different type of electron emitters. Tungsten cathodes are still used in the majority in SEMs and in general use TEMs. Improved results can be obtained with LaB6 cathodes, whereas the highest resolution can be obtained with either Schottky or cold Field Emission Sources which can only be used in suitable EMs.
Le caratteristiche esclusive dei filamenti EM di tungsteno EBS sono:
Raggio di punta minimo per raggio coerente
Attacco rigido del filo del filamento per postare per aumentare la stabilità
Completamente alleviato dallo stress per una maggiore durata del catodo
La posta lucidata termina
Dimensioni precise
Migliore economia a lungo termine
Consultare la tabella a fianco per il tipo corretto di filamento di tungsteno per SEM, TEM o Microprobe. I filamenti di tungsteno EBS sono disponibili per microscopi elettronici FEI, Hitachi, ISI, JEOL, Philips, Tescan, Zeiss, LEO, Cambridge Instruments, Leica, AmRay, Pemtron e CamScan.
Techincal sheet
AEI base Filaments compatible with Zeiss EVO, LEO, Leica, and Cambridge Instrument SEMs
Product #
Unit
MSFILWAEI
AEI Base Tungsten Filaments
AmRay Filament for all AmRay, AMR and Leitz/AMR SEMs, except AMR 1200 series
Product #
Unit
14-AM1202
AmRay Base Tungsten Filaments
Coxem Filaments H1020 for Coxem
Product #
Unit
MSFILCOX-10
Coxem filament H1020 for Coxem Q.ty 10
Set of 10 Filaments W for FEI/Philips
Product #
Unit
9432 052 50001
Set of 10 Filaments W for FEI/Philips
Hitachi S-Type Filaments for S-, SU-, H- and X-Series SEM and TEM
Product #
Unit
14-HI1204
Hitachi S-Type Base Tungsten Filaments
Hitachi S-Type pre-aligned Filaments with Metal Cartridge for S-3400N, S-3700N, SU-1500, SU-15210, SU-3500 and TM33030-3000-1000 series Table top SEM
Product #
Unit
14-HI1205
Hitachi S-Type Base pre-aligned Tungsten Filaments with Metal Cartridge
14-HT1205-1
Hitachi S-Type Base pre-aligned Tungsten Filaments with Metal Cartridge
ISI 2-Pin Filaments for ISI / ABT / Topcon SEM and ABT TEM
Product #
Unit
14-I21206
ISI 2 Pin Base Tungsten Filaments
JEOL K-Type Filaments with Stainless Steel Alignment Ring for SEM and TEM
Product #
Unit
MSFILJK
JEOL K-Type Base Tungsten Filaments with Metal Ring
Pemtron Filaments for Pemtron SEMs
Product #
Unit
14-PT1211
Pemtron filament for Pemtron SEMs
Tescan Filaments for Tescan SEMs and Camscan SEMs with new Tescan Columns
Product #
Unit
14-TN1209
Tescan Base Tungsten Filaments
14-TN1209-3
Tescan Base Tungsten Filaments
ZEISS Tungsten Filaments for Zeiss SEMs and TEMs
Product #
Unit
MSFILWZ-10
ZEISS Tungsten Filaments for Zeiss SEMs and TEMs
Tabella delle prestazioni della sorgente di elettroni
La tabella delle prestazioni della sorgente di elettroni viene fornita per fornire ulteriori informazioni relative alle prestazioni e ai requisiti per diversi tipi di emettitori di elettroni. I catodi di tungsteno sono ancora utilizzati nella maggior parte dei SEM e dei TEM di uso generale. Risultati migliori possono essere ottenuti con i catodi LaB6, mentre la massima risoluzione può essere ottenuta con Schottky o sorgenti di emissione di campo fredde che possono essere utilizzate solo in EM adatti.
Emitter Type
Thermionic
Thermionic
Schottky FE
Cold FE
Cathode Material
W
LaB6
ZrO/W (100)
W (310)
Operating Temp (K)
2700
1800
1800
300
Cathode Radius (nm)
60,000
10,000
<1000
<100
Effective Source Radius (µm)
25
10
0.015
0.0025
Emission Current Density (A/cm2)
3
30
5300
17,000
Total Emission Current (µA)
200
80
200
5
Brightness (A/cm2.sr.kV)
1×104
1×105
1×107
2×107
Maximum Probe Current (nA)
1000
1000
10
0.2
Energy Spread @ Cathode (ev)
0.59
0.4
0.31
0.26
Energy Spread @ Source Exit (eV)
1.5 – 2.5
1.3 – 2.5
0.35 – 0.7
0.3 – 0.7
Beam Noise (%)
1
1
1
5 – 10
Emission Current Drift (%/h)
0.1
0.2
<0.5
5
Operating Vacuum (hPa/mbar)
<10-5
<10-6
<10-8
<10-10
Typical Cathode Life (h)
100
>1000
>5000
>2000
Cathode Regeneration (h)
None
None
None
6-12
Sensitivity to External Influences
Minimal
Low
Low
High
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