Multinuclear Tin-Based Macrocyclic Organometallic Resist for EUV Photolithography
We report a new photoresist based on a multinuclear tin-based macrocyclic complex and its performance for extreme UV (EUV) photolithography. The new photoresist has a trinuclear macrocyclic structure containing three salicylhydroxamic acid ligands and six Sn–CH3 bonds, which was confirmed by multinu...
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Published in | ACS Materials Au Vol. 4; no. 5; pp. 468 - 478 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Chemical Society
11.09.2024
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Subjects | |
Online Access | Get full text |
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Summary: | We report a new photoresist based on a multinuclear tin-based macrocyclic complex and its performance for extreme UV (EUV) photolithography. The new photoresist has a trinuclear macrocyclic structure containing three salicylhydroxamic acid ligands and six Sn–CH3 bonds, which was confirmed by multinuclear nuclear magnetic resonance (NMR) and FT-IR spectroscopies and single-crystal X-ray diffraction study. The resist exhibited good humidity, air, and thermal stabilities, while showing good photochemical reactivity. Photochemical cross-linking of the resist was confirmed by X-ray photoelectron and solid-state NMR spectroscopic analyses. EUV photolithography with the 44 nm-thick film on a silicon wafer revealed a line-edge-roughness (LER) of 1.1 nm in a 20 nm half-pitch pattern. The Z-factor, a metric that gauges the performance of photoresists by considering the tradeoff between resolution, LER, and sensitivity (RLS), was estimated to be 1.28 × 10–8 mJ·nm3, indicating its great performance compared to the EUV photoresists reported in the literature. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2694-2461 2694-2461 |
DOI: | 10.1021/acsmaterialsau.4c00010 |