High Resolution X-Ray Scattering Methods for ULSI Materials Characterization
R J. Matyi
X-ray analytical methods with high angular resolution are becoming increasingly important for the characterization of materials used in ULSI fabrication. Vendors now market state-of -the-art X-ray tools for the routine analysis of parameters such as layer thickness, chemical composition, strain relaxation, and interfacial roughness. The recent integration of X-ray diffraction and reflectivity systems into fab-compatible process metrology tools suggests that the importance of these techniques will only increase with time. Here we discuss some basic principles of high resolution X-ray methods (notably double-and triple-axis X-ray diffractometry and high resolution X-ray reflectometry) and will describe the capabilities and limitations of these tools for ULSI materials. Reference will be made to real-life problems involving bulk and thin-film structures (ranging from amorphous dielectrics and polycrystalline metals to highly perfect epitaxial single crystal materials) to show both the utility and the shortcomings of high resolution X-ray methods.
International Conference on Characterization and Metrology for ULSI Technology
High Resolution X-Ray Scattering Methods for ULSI Materials Characterization, International Conference on Characterization and Metrology for ULSI Technology
(Accessed December 7, 2023)