
Calibration
Calibrating Z
336 Dimension 3100 Manual Rev. D
4. Record the measured depth. If the depth measured by the extended piezo is off by more than
two percent, continue to Step 5 - Step 8.
Note: The measured depth should read 200nm on a Veeco 10µm silicon calibration
reference.
5. Select Realtime > Microscope > Calibrate > Z to display the Z Calibration panel
6. Click on the Extended offset der parameter.
7. Perform the following calculation:
For example, if the current offset equals 4% and the measured depth equals 175nm, then:
8. Enter the new percent value from above (example was 19%) for the Extended offset der
parameter in the Z Calibration panel.
9. The procedure for calculating and setting the Retracted offset derating is exactly the same
as for the Extended offset der; however, the piezo must be retracted by 100V.To calculate
the Retracted offset der:
a. Use the Tip Down button in the Motor Control panel to retract the piezo.
b. Retract the Z Center Position to -100V.
c. Repeat Step 3 - Step 8 above.
(1 + current offset der)
200nm
meas. depth
—1
(1 + .04)
200nm
175nm
—1
= 0.19
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