Calibration Standard, Electron Microscopy Sciences

For AFM, use in contact, intermittent contact (TappingMode™) and other modes with image sizes from 100 to 3000 nm

Available unmounted or mounted on steel disks. For SEM, this specimen works well at a wide range of accelerating voltages (1 kV to 20 kV have been tested) and calibrates images from 25 kX to 1000 kX. Normally supplied unmounted. Can be mounted on a stub of your choice.

Usability: The calibrated pattern covers a 1.2 x 0.5 mm area. There is sufficient usable area to make thousands of measurements without reusing any areas altered or contaminated by previous scans.

Model 70-1D: This Calibration Reference specimen comes with a non-traceable, manufacturer’s certificate. This states the average period, based on batch measurements.

Model 70-1DUTC: This Traceable, Certified Standard is measured in comparison with a standard calibrated at PTB. (PTB, Physikalisch-Technischen Bundesanstalt, is the German counterpart of NIST. The standard is “NIST-Traceable” by virtue of the mutual recognition agreement between NIST and PTB.) The uncertainty of single pitch values is typically +/- 0.5 nm (95% confidence interval). Multi-pitch measurements provide the usual square-root of N improvement in precision.

AFM Tapping Mode scan: The ridge height is about 35 nm. This specimen is not recommended as a height reference because the standard AFM probes may not always reach the substrate level between the ridges. Nevertheless, the image contrast is high, even when the probe tip is slightly dull. You can scan in contact mode, which means you can calibrate and measure faster.
The patterned area is easy to find. The three rectangles shown in the sketch below are visible in reflected light, with either the unaided eye or an optical microscope. In a low magnification SEM image, the contrast is reversed. The central rectangle, which is the grating pattern, is relatively bright. The grating lines are parallel to the long side of the rectangle, as suggested by the high magnification SEM image.
Ordering for the Very High Calibration and Traceable Standard: Available in the following ways: unmounted, 15mm steel disk(for AFM), SEM pin stub, or any other type of SEM stub.