Journal
MICROELECTRONIC ENGINEERING
Volume 84, Issue 5-8, Pages 963-966Publisher
ELSEVIER
DOI: 10.1016/j.mee.2007.01.079
Keywords
nanoimprinting; multi-head unit; overlay and alignment; compliant mechanism; nanoimprinting lithography
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Nanoimprinting lithography (NIL) is a promising technology to produce sub-50 nm half-pitch features on silicon- and/or quartz-based substrates. It is well-known as the next generation lithography. Especially, the UV-nanoimprint lithography technology has advantages of the simple process, low cost, high replication fidelity and relatively high throughput. In this paper, chip-size multi-head imprinting unit with compliance stage and overlay/alignment system with moire and dual grating unit are proposed in order to fabricate sub-50 nm half-pitch patterns. These systems are set-up and performed in single-step nanoimprinting tool (ANT-4) which has several functional units for nanoimprinting process. Using the UV-NIL tool, 50 nm, 70 nm and 100 nm half-pitch dot and line patterns are obtained. Also, 20 nm overlay/alignment accuracy is obtained by means of the proposed method. (c) 2007 Elsevier B.V. All rights reserved.
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