LEAP (Local Electrode Atom Probe) is the modern implementation of atom probe tomography using a local electrode to enable higher field evaporation rates and larger analysis volumes — the industry-standard instrument for 3D atomic-scale characterization (manufactured by CAMECA).

How Does LEAP Differ From Conventional APT?

• Local Electrode: A small counter-electrode close to the specimen tip (vs. distant flat electrode).
• Higher Voltage Efficiency: The local geometry concentrates the electric field, enabling operation at lower voltages.
• Higher Data Rate: 10$^6$-10$^7$ ions/minute detection rate (100-1000× faster than conventional APT).
• Laser Pulsing: UV laser pulsing enables analysis of non-conductive materials (oxides, dielectrics).

Why It Matters

• Industry Standard: LEAP (CAMECA) is the dominant APT instrument in semiconductor R&D labs.
• Volume: Analyzes volumes ~100×100×500 nm$^3$ — sufficient for single-device analysis.
• Materials: With laser pulsing, LEAP can analyze semiconductors, metals, oxides, and even biological specimens.

LEAP is the modern atom probe — the high-throughput, versatile instrument that made atomic-scale 3D analysis practical for semiconductor development.