The probe has a conical shape. Si3N4
coating is applied to both sides of the the cantilevers. The thickness
of the coating is 10 nm. Si3N4 is a chemically
inert and more hydrophobic than Si with natural oxide layer.
Resulting tip radius with the coating
20 nm
Full tip cone angle*
40°
Tip aspect ratio
more than 3:1 (4:1 typical)
Total tip height
20..25 µm
Probe bulk material
n-type silicon (phosphorus doped).
*The full cone angle may be less than 40° at the last
200 nm of the tip end.
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