Atomic scale dopant metrology in an individual silicon nanowire by atom probe tomography

摘要

In this work, the p-type silicon nanowires (SiNWs) are grown by the Chemical Vapor Deposition (CVD) method using gold as catalyst droplet, silane as precursor and diborane as dopant reactant and are analyzed at the atomic scale using the three dimensional laser assisted Atom Probe Tomography (APT). This paper reports the preparation of SiNWs and their observation. A three dimensional dopant distribution and its accurate concentration are determined. The possible dopant incorporation pathway into an individual SiNW is also discussed.