Fabrication and Application of Polyimide Plastic Molds for Nanoimprint Lithography
Authors: Wu, Chun-Chang; Hsu, Steve Lien-Chung; Lo, I.-Lin
Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 10, October 2010 , pp. 6446-6452(7)
Publisher: American Scientific Publishers
Abstract:In this work, we have developed low-cost, high modulus, flexible, and UV transparent polyimide plastic molds for nanoimprint lithography (NIL). Different structures of poly(amic acids) (PAA) and polyimides (PI) have been synthesized. By casting the PAA or PI solutions on a silicon master, flexible but still rigid plastic molds can be produced. The advantages of the PI molds are: (1) high glass-transition temperatures (Tg) up to 310 °C, (2) high thermal stability over 500 °C, (3) high tensile modulus, and (4) UV transparency for use in UV-NIL. Various micrometer and nanometer scale patterns could be obtained from the PI molds on a large area (4 inch wafer). The imprinting results showed that the PI molds could be faithfully used for both hot embossing NIL and UV-NIL.
Document Type: Research Article
Publication date: October 1, 2010
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