Articles

Low energy electron beam proximity projection lithography

[+] Author Affiliations
Norihiko Samoto, Akira Yoshida

R&D Division, LEEPL Corporation, 2968-2 Ishikawa-machi, Hachioji, Tokyo, 192-0032, Japan

Hideki Takano

LSG, Tokyo Seimitsu Co. Ltd., 2968-2 Ishikawa-machi, Hachioji, Tokyo, 192-0032, Japan

Akihiro Endo

R&D Division, LEEPL Corporation, 2968-2 Ishikawa-machi, Hachioji, Tokyo, 192-0032, Japan

Toyoji Fukui

LSG, Tokyo Seimitsu Co. Ltd., 2968-2 Ishikawa-machi, Hachioji, Tokyo, 192-0032, Japan

J. Micro/Nanolith. MEMS MOEMS. 4(2), 023008 (May 13, 2005). doi:10.1117/1.1898063
History: Received May 7, 2004; Revised Sep. 13, 2004; Accepted Sep. 17, 2004; May 13, 2005; Online May 13, 2005
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The low energy electron beam proximity projection lithography (LEEPL) system consists of three properties: low energy electron beam, a parallel beam, and proximity projection. The low energy electrons increase the effective resist sensitivity and greatly minimize the proximity effect. Over a 20 μm depth of focus is achieved by the parallel beam on the proximity projection. The subdeflection system of the LEEPL system is useful in correcting the mask distortion and chip distortion on the wafer by a correction data map corresponding to the field, because of the space (>30 μm) between the wafer and the mask. The overlay accuracy of the machine itself is less than 14 nm and that of mix and match is less than 25 nm. This implies that the overlay between the LEEPL system and an ArF scanner in both the x and y directions are obtained. This machine shows the 48 nm ϕ CH resist patterns as the ultimate resolution. The cost of ownership (CoO) of the LEEPL system for a 65 nm node device will be approximately less than $25/wafer/layer and the value is lower than that of an ArF scanner. © 2005 Society of Photo-Optical Instrumentation Engineers.

© 2005 Society of Photo-Optical Instrumentation Engineers

Citation

Norihiko Samoto ; Akira Yoshida ; Hideki Takano ; Akihiro Endo and Toyoji Fukui
"Low energy electron beam proximity projection lithography", J. Micro/Nanolith. MEMS MOEMS. 4(2), 023008 (May 13, 2005). ; http://dx.doi.org/10.1117/1.1898063


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