Advancing next generation nanolithography with infiltration synthesis of hybrid nanocomposite resists
Abstract
Organic–inorganic hybrid resists are emerging as an effective way of addressing stringent process requirements for aggressive down-scaling of semiconducting devices. Yet, hybrid resists generally require complex chemical synthesis while being predominantly negative-tone with high dose requirements. For positive-tone processes and high-aspect-ratio pattern transfers, resist choices are limited to costly, non-hybrid alternatives, whose etch resistance is still inferior compared with hybrid resists. In this work, we demonstrate a novel hybrid positive-tone resist platform utilizing simple ex situ vapor-phase inorganic infiltration into standard resist materials. A model system based on poly(methyl methacrylate) (PMMA) thin film hybridized with aluminum oxide has been demonstrated for electron-beam lithography patterning, featuring a fully controllable critical exposure dose, contrast, and etch resistance. The hybrid resist not only achieves contrast as high as ~30, six-fold enhancement over standard PMMA, but also enables Si nanostructures with resolution down to ~30 nm and an aspect ratio as high as ~17, owing to enhancement of the Si etch selectivity to ~70, with an estimated achievable maximum of ~300, far exceeding known commercial positive-tone resist systems. The easy implementabilility, combined with versatile ex situ control of resist characteristics, makes this hybrid resist synthesis method uniquely suited for addressing the resist performance andmore »
- Authors:
-
[1];
[2];
[1]
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Stony Brook Univ., NY (United States)
- Univ. of Texas-Dallas, Richardson, TX (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1561253
- Alternate Identifier(s):
- OSTI ID: 1542528
- Report Number(s):
- BNL-212064-2019-JAAM; BNL-213624-2020-JAAM
Journal ID: ISSN 2050-7526; JMCCCX
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Materials Chemistry C
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 29; Journal ID: ISSN 2050-7526
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 29 ENERGY PLANNING, POLICY AND ECONOMY; 36 MATERIALS SCIENCE
Citation Formats
Tiwale, Nikhil, Subramanian, Ashwanth, Kisslinger, Kim, Lu, Ming, Kim, Jiyoung, Stein, Aaron, and Nam, Chang-Yong. Advancing next generation nanolithography with infiltration synthesis of hybrid nanocomposite resists. United States: N. p., 2019.
Web. doi:10.1039/C9TC02974E.
Tiwale, Nikhil, Subramanian, Ashwanth, Kisslinger, Kim, Lu, Ming, Kim, Jiyoung, Stein, Aaron, & Nam, Chang-Yong. Advancing next generation nanolithography with infiltration synthesis of hybrid nanocomposite resists. United States. https://doi.org/10.1039/C9TC02974E
Tiwale, Nikhil, Subramanian, Ashwanth, Kisslinger, Kim, Lu, Ming, Kim, Jiyoung, Stein, Aaron, and Nam, Chang-Yong. Mon .
"Advancing next generation nanolithography with infiltration synthesis of hybrid nanocomposite resists". United States. https://doi.org/10.1039/C9TC02974E. https://www.osti.gov/servlets/purl/1561253.
@article{osti_1561253,
title = {Advancing next generation nanolithography with infiltration synthesis of hybrid nanocomposite resists},
author = {Tiwale, Nikhil and Subramanian, Ashwanth and Kisslinger, Kim and Lu, Ming and Kim, Jiyoung and Stein, Aaron and Nam, Chang-Yong},
abstractNote = {Organic–inorganic hybrid resists are emerging as an effective way of addressing stringent process requirements for aggressive down-scaling of semiconducting devices. Yet, hybrid resists generally require complex chemical synthesis while being predominantly negative-tone with high dose requirements. For positive-tone processes and high-aspect-ratio pattern transfers, resist choices are limited to costly, non-hybrid alternatives, whose etch resistance is still inferior compared with hybrid resists. In this work, we demonstrate a novel hybrid positive-tone resist platform utilizing simple ex situ vapor-phase inorganic infiltration into standard resist materials. A model system based on poly(methyl methacrylate) (PMMA) thin film hybridized with aluminum oxide has been demonstrated for electron-beam lithography patterning, featuring a fully controllable critical exposure dose, contrast, and etch resistance. The hybrid resist not only achieves contrast as high as ~30, six-fold enhancement over standard PMMA, but also enables Si nanostructures with resolution down to ~30 nm and an aspect ratio as high as ~17, owing to enhancement of the Si etch selectivity to ~70, with an estimated achievable maximum of ~300, far exceeding known commercial positive-tone resist systems. The easy implementabilility, combined with versatile ex situ control of resist characteristics, makes this hybrid resist synthesis method uniquely suited for addressing the resist performance and high throughput required for advanced nanolithography techniques, such as extreme ultraviolet lithography, possibly.},
doi = {10.1039/C9TC02974E},
journal = {Journal of Materials Chemistry C},
number = 29,
volume = 7,
place = {United States},
year = {2019},
month = {7}
}
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Cited by: 26 works
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Figures / Tables:
Fig. 1: Schematic representation of the process flow followed during the current study (a) PMMA 950 A2 was spin coated on cleaned Si substrates with 7500 rpm for 60 sec resulting into ~60 nm PMMA film. During the infiltration process alternating half-cycles of (b) TMA infiltration and (c) water infiltrationmore »
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Works referencing / citing this record:
The chemical physics of sequential infiltration synthesis—A thermodynamic and kinetic perspective
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Figures / Tables found in this record:
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