4 March 2022 Improvement of productivity by spin-coating and flash imprint lithography
Author Affiliations +
Abstract

To improve the productivity of nanoimprint lithography (NIL) in semiconductor manufacturing, we have developed spin-coating and flash imprint lithography (SC-FIL). Using a newly developed SC-FIL resist, we imprinted a 300-mm-wide whole wafer including partial fields. The cross-sectional image showed a well-shaped half-pitch dense line with a width of 26 nm. The mix-and-match overlay accuracy (3σ) was 3.9 nm in the X direction and 3.4 nm in the Y direction. Assuming Washburn’s model of capillary flow, we identified the unique defect-generation mechanism in SC-FIL and hence optimized the SC-FIL process for high throughput and low defect density. After optimizing the NIL, the multimodule NZ2C system with four imprint heads is expected to achieve a throughput of 124 wafers per hour and a defectivity of only 0.005  defects per cm2.

© 2022 Society of Photo-Optical Instrumentation Engineers (SPIE) 1932-5150/2022/$28.00 © 2022 SPIE
Takahiro Iwasaki, Hirokazu Miyoshi, Anupam Mitra, Masayuki Hatano, Kazuya Fukuhara, Motofumi Komori, Takuya Kono, and Tetsuro Nakasugi "Improvement of productivity by spin-coating and flash imprint lithography," Journal of Micro/Nanopatterning, Materials, and Metrology 21(1), 011008 (4 March 2022). https://doi.org/10.1117/1.JMM.21.1.011008
Received: 13 September 2021; Accepted: 1 February 2022; Published: 4 March 2022
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KEYWORDS
Nanoimprint lithography

Semiconducting wafers

Lithography

Head

Coating

Photoresist processing

Overlay metrology

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