Nano-laminography with a transmission X-ray microscope.

Area of Science:

• Materials Science
• Nanotechnology
• X-ray Imaging

Background:

• Conventional nano-tomography struggles with imaging laterally extended, flat specimens due to artifacts from long optical path lengths.
• These limitations hinder detailed 3D structural analysis of planar samples, such as integrated circuits and challenging powder particle mounts.

Purpose of the Study:

• To demonstrate a full-field X-ray nano-laminography system for high-resolution 3D imaging of flat specimens.
• To overcome the limitations of conventional nano-tomography for imaging challenging sample geometries.

Main Methods:

• Implementation of a full-field, X-ray nano-laminography system at the Advanced Photon Source (APS) beamline 32-ID.
• Utilized a tilted rotational geometry (sample axis inclined 20° to the incident beam) to minimize artifacts.
• Developed specific sample mounting strategies, data acquisition protocols, and reconstruction methods tailored for nano-laminography.

Main Results:

• Achieved 50 nm spatial resolution in 3D imaging.
• Demonstrated minute-scale temporal resolution for dynamic imaging.
• Successfully imaged a planar integrated circuit and an individual particle within a powder sample, showcasing the technique's efficiency and versatility.

Conclusions:

• X-ray nano-laminography is an effective technique for high-resolution 3D imaging of flat and extended specimens.
• The developed system overcomes key challenges associated with conventional nano-tomography, enabling analysis of previously difficult samples.
• This advancement facilitates detailed structural characterization in fields like microelectronics and materials science.