local electrode atom probe

**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.