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Interleave Scanning

Use of LiftMode with TappingMode

Rev. D Dimension 3100 Manual 251

Note that certain constraints are imposed: scan sizes, offsets, angles, and rates and numbers of

samples per scan line are the same for the main and interleave data, and the imaging context

(contact, TappingMode, or force modulation) must also match.

3. Choose the Interleave Data Type: Depending on the type of microscope, Interleave mode

allows the options of amplitude, phase, frequency, potential, input potential, or data types for

doing far-field (MFM or EFM) imaging; see Chapter 15 for detailed examples. Auxiliary

channels are also available for some applications.

Once the Interleave Data Type is chosen, Interleave mode is automatically enabled, triggering

interleave scanning. Interleave data typically displays as the second (right) image. Note that the

scan rate in the slow direction is halved.

4. Display the interleave data by switching Scan line (in the Channel panels) to Interleave.

• Lift scan height: The lateral and vertical resolutions of the Lift data depend on the

distance between tip and sample: the lower the tip, the higher the resolution. However,

the Lift scan height must be high enough that the tip does not contact the sample during

the Lift trace and retrace.

• Tip Shape: As shown in Figure 14.3a, the tip separation in the LiftMode is deﬁned in

terms of the Z direction only. The Lift scan height is added to the height values taken

from previous scan lines point-by-point. However, the tip may be closer to the sample

than the Z separation indicates. On features with steep edges, the tip may get very close

to the sample even though the Z separation is constant; see Figure 14.3a.

• Scan Line Direction: The Line direction should be set to Retrace for both the main

and interleaved scans. If it is set instead to Trace, a band may appear along the left side

of the images due to the ramp between the surface and the Lift scan height.

14.5 Use of LiftMode with TappingMode

There are additional considerations when using LiftMode with TappingMode.

14.5.1 Main Drive Amplitude and Frequency selection

As usual, these parameters are set in Cantilever Tune before engaging. It is helpful to keep in mind

the measurements to be done in LiftMode when setting these values. For example, if Amplitude

data will be monitored during the Lift scan for magnetic force imaging, the Drive frequency

should be set to the side of the resonance; see Chapter 15. (However, certain parameters can be set

independently for the interleave scan; see below.)

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