５
MEASUREMENT OPERATION
b.
Click on the
button in the Source selection box on the SPS Parameters
c.
Click on the
window, and then select Linear current from the pull-down menu.
button in the Preamp Gain selection box on the SPS
down menu.
lifier gain for I-V measurement. If the measured
Direction; then the
selected, scanning is performed from a voltage near the
.0 V to –1.0 V.
If Up is selected, the scanning will be performed from –1.0 V to +1.0 V regardless
of the value specified for Bias/V.
If Down is selected, the scanning will be performed from +1.0 V to –1.0 V regard-
less of the value specified for Bias/V.
e.
Click on the
Parameters window, and then select 1.00 V/nA from the pull-
This value determines the preamp
current gets saturated, decrease the gain.
d.
Select Auto by clicking on the radio button for Ramp
button changes to “ ”.
Ramp Direction determines the scanning direction of the bias voltage for I-V
measurement. If Auto is
voltage specified for Bias/V on the SPM Parameters window.
Suppose that Bias/V is set to 1.0 V, and Low Voltage/V to –1.0 V and High Volt-
age/V to 1.0 V.
If Auto is selected, the scanning will be performed from +1
button in the No to
election box nd select 1 from
the pull-down menu.
This specifies the number of I-V measurements for data averaging. Increase the
number particularly when data is noisy o
o measure is very small.
f.
Click on the
Average s
r when a current t
a
button in the Number of Points selection box, and then
select 128 from the pull-down menu.
This specifies the number of points for I-V measurement. The possible number is up
to 2048 points.
g.
Click on the
button in the SPS Mode selection box and select I—V from
The I–V measurement is set to the specified SPS mode.
cal settings of SPS Parameters.
1
the pull-down menu.
The foregoing are typi
1.
Click on the
button in the Acquisition selection box, and then select
Single SPS from the pull-down menu.
12.
epeat button on the Advanced tab window of the SPM
P
,
the data by using the Plot parameters item of the Display
he changed position
Abort has been performed, the cantilever tip is at the initial position.
Click on the R
arameters window.
The I-V measurement will start. When you want to change the I-V display method
change it after grabbing
menu in the main menu bar.
If the measurement position is changed with this method, t
becomes the initial position. Therefore, when scanning has been finished or
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TMPM5200-2
