Research Clarifies Resist Tone Conversion for Lithography
The study defines how dry-deposited frameworks react to EUV and electron-beam sources, aiding future chip patterning.
Updated on Oct. 25, 2026 in Materials Science
Researchers from KU Leuven, Kunsan National University, Vrije Universiteit Brussel, and imec published findings in October 2026 on tone conversion in halogenated amorphous zeolitic imidazolate framework (ZIF) resists. The study explores how these dry-deposited materials behave under electron-beam and extreme ultraviolet (EUV) lithography.
Why it matters
Dry-deposited metal-organic resists are critical enablers for next-generation semiconductor manufacturing, where precise patterning at the nanometer scale is required. Understanding tone conversion dependencies allows for better optimization of resists in high-resolution fabrication processes.
The researchers characterized a halogenated amorphous zeolitic imidazolate framework resist that is deposited entirely via dry processes. The material exhibits irradiation-source-dependent tone conversion, a phenomenon where the resist's polarity changes based on whether it is exposed to electron-beam or EUV sources.
The players
imec
A global research and development hub for nanoelectronics and digital technologies that focuses on semiconductor scaling and lithography advancements.
KU Leuven
A research university based in Belgium that contributes to material science and nanotechnology breakthroughs.
The details
The study focuses on resists—light-sensitive materials used to transfer patterns onto silicon wafers. These specific materials are metal-organic frameworks (MOFs), which are crystalline or amorphous structures made of metal ions linked by organic ligands. By utilizing a dry-deposition technique, the researchers avoid the chemical constraints of traditional wet-process solvents, which can damage delicate micro-features. The tone conversion effect observed means the resist can act as either a positive-tone or negative-tone material depending on the energy source used for patterning.
Timeline
October 2026: Publication of the research paper in ACS Applied Materials & Interfaces.
The Tech Race
This development addresses the need for specialized resists capable of keeping pace with the industry's shift toward high-NA EUV lithography. It sits alongside ongoing efforts by research consortia to replace traditional chemically amplified resists with more stable, metal-organic alternatives.
These findings are currently at the research stage and do not yet affect existing semiconductor production workflows or consumer device costs. Industry developers can utilize these results to refine resist chemistry for upcoming node transitions in chip fabrication.
The takeaway
The research establishes a new characterization framework for metal-organic resists in advanced lithography. Readers should watch for future reports regarding the etch resistance and sensitivity benchmarks of these materials in pilot manufacturing lines.
Further reading
Explore more developments in Materials Science to understand the shifting landscape of semiconductor manufacturing.
Source note: This article includes information reported by Semiconductor Engineering.
