Dell 3100 Especificações descarregar pdf (Página 128)

Head, Probe, & Sample Preparation

Basic AFM Operation

108 Dimension 3100 Manual Rev. D

2. Verify the laser beam is visible on the surface below. If it is not, turn the rear-right laser

control knob counter-clockwise until the laser spot appears on the surface below.

3. Turn the rear-right laser control knob clockwise to move the laser in the X positive direction

until the laser spot disappears from the surface below. Turn the right-rear laser control knob

counter-clockwise until the laser spot just reappears. The laser is now positioned at the edge

of the substrate (see Point 1 in Figure 7.2f).

Figure 7.2f Etched Silicon Tip Laser Alignment

4. Turn the front-left laser control knob clockwise or counter-clockwise to move the laser in the

Y direction (parallel to the substrate edge and perpendicular to the cantilever) until the beam

crosses the cantilever and a shadow appears over the laser spot on the surface below. The

laser is now positioned over the cantilever (see Point 2 in Figure 7.2f).

5. Verify that the laser is deflecting off the cantilever by moving the laser on, over, and off the

cantilever by turning the front-left laser control knob less than 1/8 of a turn.

6. Turn the rear-right laser control knob counter-clockwise to move the laser in the X negative

direction on the cantilever until the laser crosses the tip-end of the cantilever and falls on the

surface below.

7. Move the laser onto the tip-end of the cantilever by reversing the direction of the rear-right

laser control knob clockwise until the spot disappears from the surface below (see Point 3 in

Figure 7.2f).

8. Verify that a laser spot appears in the Dimension head filter screen. If there is not laser spot,

adjust the photodetector mirror using the photodetector adjustment knobs located on the left

side of the SPM head (see Figure 7.2g).

CAUTION: Use extreme caution when removing the SPM head. Hold the head

firmly and do not stress the wire between the SPM head and the

Dimension base. Dropping the head will likely result in damage

and Veeco factory repair.

Refl ect ions on

Laser View Screen

On cantilever leg

or tip

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