6 December 2023 Multi e-beam direct write: what are the options for the future?
Guido de Boer
Author Affiliations +
Abstract

Electron beams have been used for lithography since the 1970s. Resolution was never the limitation, but the throughput was. When the so-called next-generation lithography (NGL) solutions were adopted in the 1990s, electron beam and nano-imprint technology were considered alternatives for optical lithography. However, since ASML brought its extreme ultraviolet (EUV) lithography on the market, the NGL of choice seemed to be clear. Two issues remained unsolved: how to make the reticles and, second, how to serve the market for low-volume semiconductor wafer manufacturing for which the EUV solution does not give a commercial viable solution. As multi e-beam has proven to be a successful solution for the reticle writing issue, the question is whether it could also address the second issue. The two main e-beam candidate technologies are compared here in terms of their throughput claims, LWR, and addressing grid as well as their scalability (LEEPL, low-energy electron beam proximity-projection lithography, is not considered, as it is not a maskless technology).

© 2023 Society of Photo-Optical Instrumentation Engineers (SPIE)
Guido de Boer "Multi e-beam direct write: what are the options for the future?," Journal of Micro/Nanopatterning, Materials, and Metrology 22(4), 041407 (6 December 2023). https://doi.org/10.1117/1.JMM.22.4.041407
Received: 15 May 2023; Accepted: 31 August 2023; Published: 6 December 2023
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KEYWORDS
Semiconducting wafers

Electron beam lithography

Lithography

Electron beams

Reticles

Wafer level optics

Light sources and illumination

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