
Electric Techniques
Electric Force Microscopy
288 Dimension 3100 Manual Rev. D
External Voltage Source Applied to Tip (With Extender Electronics)
In some cases, it may be advantageous to use voltages greater than 12V, or to use a pulsed power
supply. If an external source of voltage is to be applied to the tip, configure jumpers as shown in
Figure 16.2m.
Figure 16.2m Jumper Configuration for Applying External Voltage to Tip
Place a current-limiting resistor (e.g., 10–100 MΩ) in series with the external voltage supply as
shown to protect the tip and sample from damage. You can also use current-limited power supplies.
Connect voltage leads to pins on the header using soldered, push-on connectors. Do not solder
leads directly to the header pins as the heat may cause damage or make jumpering the pins difficult.
Chuck Ground/Bias
Unused
Auxiliary 2 Output
Ground
STM Signal
Indicates Jumpers
Unused
Ground
Ground
AFM Tip
Chuck
(-)(+)
External Voltage
Source
Analog 2 or
Gnd/OSC + DC signal
Sample
Tip
+
–
V
>10 MW
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