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Updated: May 13, 2026
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Single-Digit Nanometer Electron-Beam Lithography with an Aberration-Corrected Scanning Transmission Electron Microscope
Published on: September 14, 2018
Resolution limits of electron-beam lithography toward the atomic scale
Vitor R Manfrinato1, Lihua Zhang, Dong Su
1Electrical Engineering and Computer Science Department, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Nano Letters
|March 16, 2013
Summary
Electron-beam lithography using an aberration-corrected scanning transmission electron microscope achieved 2 nm isolated features. This advanced technique analyzed resolution limits and energy loss in hydrogen silsesquioxane resist.
Area of Science:
- Materials Science
- Nanotechnology
- Physics
Background:
- Electron-beam lithography (EBL) is crucial for fabricating nanoscale devices.
- Achieving higher resolution in EBL is essential for next-generation electronics.
- Aberration correction in electron microscopes offers potential for enhanced lithography resolution.
Purpose of the Study:
- To investigate the resolution capabilities of aberration-corrected scanning transmission electron microscopy for electron-beam lithography.
- To determine the minimum feature size achievable with this technique.
- To analyze the fundamental limits and physical processes governing the resolution.
Main Methods:
- Utilized an aberration-corrected scanning transmission electron microscope (STEM) for electron-beam lithography.
- Fabricated nanoscale patterns in hydrogen silsesquioxane (HSQ) resist.
- Measured the point-spread function (PSF) at 200 keV to assess resolution.
- Employed electron-energy-loss spectroscopy (EELS) to analyze energy deposition in the resist.
Main Results:
- Achieved 2 nm isolated feature sizes.
- Demonstrated a 5 nm half-pitch resolution.
- Quantified the point-spread function, providing insights into resolution limits.
- Measured energy loss within the HSQ resist during the lithography process.
Conclusions:
- Aberration-corrected STEM is a powerful tool for high-resolution electron-beam lithography.
- The study establishes new benchmarks for feature size and half-pitch in HSQ resist.
- Understanding energy loss mechanisms is vital for further optimization of EBL processes.
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