Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5466775 | Ultramicroscopy | 2017 | 6 Pages |
Abstract
The relationship between the laser power and the three-dimensional distribution of boron (B) in silicon (Si) measured by laser-assisted atom probe tomography (APT) is investigated. The ultraviolet laser employed in this study has a fixed wavelength of 355Â nm. The measured distributions are almost uniform and homogeneous when using low laser power, while clear B accumulation at the low-index pole of single-crystalline Si and segregation along the grain boundaries in polycrystalline Si are observed when using high laser power (100Â pJ). These effects are thought to be caused by the surface migration of atoms, which is promoted by high laser power. Therefore, for ensuring a high-fidelity APT measurement of the B distribution in Si, high laser power is not recommended.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Y. Tu, H. Takamizawa, B. Han, Y. Shimizu, K. Inoue, T. Toyama, F. Yano, A. Nishida, Y. Nagai,