Thin gold/chromium film is coated on the back side of the cantilevers for reflecting light from a deflection sensor in the AFM equipment.
[Tip side coating]
Thin gold/chromium film is also coated on the tip side of the cantilevers in the series of OMCL-TR/RC***PB- types. Because of the over coating on the tip side, the radius of the tip of the OMCL-TR/RC***PB- types become blunter, 40 nm or less, than that of OMCL-TR/RC***PSA- types, 20nm or less.
Below is the gold thickness on the levers of the tip side. According to the tip sharpness described above, the gold thickness at the tip apex must be thinner than those values.
|Gold thickness on Tip-side (nm)