- Scanning Electron Microscope (SEM)
- JSM-7200F Schottky Field Emission Scanning Electron Microscope
JSM-7200F Schottky Field Emission Scanning Electron Microscope
- Related Products
The main features of JSM-7200F are “In-Lens SchottkyPlus” technology-based electron optics, GB (Gentle Beam mode), TTLS (Through-The-Lens System) that enables high resolution observation at low accelerating voltage and control the amount of low-energy signals to be detected by the upper detectors, and a hybrid objective lens that combines magnetic-lens and electrostatic-lens.
In-Lens Schottky Electron Gun
The In-Lens Schottky electron gun (JEOL patented) has been developed by optimizing the geometry of the electron gun and the low-aberration condenser lens. By this unique technology the electrons emitted from the electron gun can be utilized efficiently than the conventional one, so smaller-diameter of electron probe even with large current is possible. Thus, JSM-7200F is capable of high throughput analysis (EDS, WDS, EBSD, etc.).
TTLS (through-the-lens system) is a system that enables high resolution observation at low accelerating voltage and also selection of different signals generated from the specimen by using GB (Gentle Beam mode).
By applying bias voltage to the specimen with GB (Gentle Beam mode), the incident electrons are decelerated and the electrons emitted from the specimen are accelerated, so it is possible to have high resolution images with better signal-to-noise ratio even at low accelerating voltage/landing voltage.
The filtering voltage of the energy filter equipped on TTLS enables you to control the amount of secondary electrons to be detected by the upper detectors. Therefore, images of the top surface of the specimen generated only by high-angle backscattered electrons can be observed at low accelerating voltage with the upper electron detector (UED).
Low-energy electrons, which are not detected with UED and pushed away by the filtering voltage, can be also detected with an optional upper secondary electron detector (USD). Thus, JSM-7200F can detect both secondary electron image and backscattered electron image simultaneously.
Hybrid Objective Lens (combination of magnetic-lens and electrostatic-lens)
JSM-7200F adopts a newly-designed objective lens called “hybrid lens”.
The hybrid lens combines a magnetic-lens and an electrostatic-lens in order to reduce aberrations, so it is possible to obtain higher spatial resolution compared with the conventional out-lens. JSM-7200F also keeps the usability of the conventional out-lens, so it is no problem to observe and analyze magnetic samples.
The low-aberration hybrid lens and ＧB (Gentle Beam mode) enables high resolution observation of insulating materials at very low accelerating voltage.
|Landing voltage: 0.5 kV
Specimen: Mesoporous silica (Courtesy of Professor Shunai Che, Shanghai Jiao Tong University, China)
These images are taken by UED at low accelerating voltages. These are high-angle backscattered electron images with composition-rich information, but the image taken at 0.8 kV shows much finer structures of the top surface compared with the image taken at 5 kV. It is necessary to have not only the upper electron detector (UED) but also an energy filter to obtain backscattered electron images of the top surface in order to cut out secondary electrons.
|Accelerating voltage: 0.8 kV(to the left), 5kV(to the right)
Energy filter: -250 V
Specimen: The surface of an Au plate
|JSM-7200F||JSM-7200F with Low Vacuum mode (LV) * Option|
|Resolution (1 kV)||1.6 nm|
|Resolution (20 kV)||1.0 nm|
|Resolution (Analysis)||3.0 nm
(15 kV, WD:10 mm, probe current:5 nA)
|Magnification||x10 to x1,000,000|
|Accelerating voltage||0.01 to 30 kV|
|Probe current||1 pA to 300 nA|
|Detector (standard)||UED, LED|
|Detector (optional)||USD, RBED|
|Electron gun||In-lens Schottky field emission electron gun|
|Aperture angle control lens||Built in|
|Objective lens||Conical lens|
|Specimen stage||Fully eucentric goniometer stage|
|Stage movement||X: 70 mm, Y: 50 mm, Z: 2 to 41 mm,
Tilt: -5 to 70°, Rotation: 360°
|Motor control||5 axes motor controlled|
|Specimen exchange chamber||Maximum diameter : 100 mm
Maximum height : 40 mm
(vented with dry nitrogen)
|Large depth of focus (LDF)||Built in|
|LV mode||-||Built in|
|LV detector||-||LV-BED, LV-SED
|LV resolution||-||1.8 nm（30 kV）|
|Pressure in LV mode||-||10 Pa to 300 Pa|
||On the operation GUI|
|Evacuation system (SIP, TMP)||SIP x 2, TMP|
|Evacuation system (RP)||RP x 1||RP x 2|
- Retractable Backscattered electron detector (RBED)
- Upper secondary electron detector (USD)
- Low vacuum secondary electron detector (LV-SED)
- Energy dispersive X-ray spectrometry (EDS)
- Electron backscatter diffraction (EBSD)
- Wavelength dispersive X-ray spectrometry (WDS)
- Large specimen stage (SS100S)
- Specimen exchange chamber (Type1)
- Stage navigation system (SNS)
- Chamber camera
- Operation table
- SMile View
- Soft X-ray Emission Spectrometer(SXES)