TMPM5200-2
5-45
•
Oscillation level (OSC Level/V)
When you use hard cantilevers such as an Si cantilever, it is recommended that you
use a low oscillation level to observe the image. If the oscillation level is too high,
the cantilever may be broken. When you use soft cantilevers, however, increase the
oscillation level accordingly. Generally, the harder the cantilever, the better the
results for viscoelasticity image observation.
5.4.4 SKPM
Tab
SKPM (Scanning Kelvin probe Microscopy) is an optional function that requires a
lock-in amplifier supplied to order. Connect the lock-in amplifier to the SPM controller
and set the software in accordance with the procedure in Section 5.2.5, “Lock-in
■
Preparation fo
. A current-detection
amplifier (operational amplifier) is incorporated in the SPM head. The cantilever is
groun
s amplifier.
■
Selecting a
er
If a cantilever has a long and short cantilever tips, as shown in the figure below, and you
age observation, be sure to break and remove the
long
ctive cantilever whose resonance
frequency is 100 to 300 kHz.
amplifier.”
r SKPM image observation
A conductive cantilever is used for SKPM image observation
ded via thi
cantilev
want to use the short cantilever for im
one using a pair of tweezers. For this, use a condu
Tweezers
Long
cantilever
The top of the long
cantilever touches
the specimen before
the shor t one.
Cantilever
Laser
—— CAUTION ———————
When you use a short cantilever, be sure to remove the long one with a
pair of tweezers. Otherwise, the top of the long cantilever touches the
specimen before the short one does.
