TappingMode™is a primary AFM mode. The probe is a microfabricated cantilever with a sharp tip. A drive signal, applied to the “tapping piezo,” mechanically oscillates the probe at or near its resonance frequency (usually the fundamental resonance). Detector signal is cantilever oscillation amplitude, or phase (relative to drive signal). In feedback mode, output signal usually adjusts the Z position of the scanner to maintain an (rms) amplitude setpoint. TappingMode enables numerous secondary modes, including PhaseImaging™, EFM, MFM, and Surface Potential imaging.