Invention Application
US20050074697A1 Method for fabricating masters for imprint lithography and related imprint process
审中-公开
制作压印光刻技术的方法及相关压印工艺
- Patent Title: Method for fabricating masters for imprint lithography and related imprint process
- Patent Title (中): 制作压印光刻技术的方法及相关压印工艺
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Application No.: US10945598Application Date: 2004-09-21
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Publication No.: US20050074697A1Publication Date: 2005-04-07
- Inventor: Massimo De Vittorio , Sergio Bernardi , Dario Pisignano , Maria Todaro , Roberto Cingolani , Giuseppe Gigli
- Applicant: Massimo De Vittorio , Sergio Bernardi , Dario Pisignano , Maria Todaro , Roberto Cingolani , Giuseppe Gigli
- Priority: GB0323301.2 20031004
- Main IPC: B29C33/38
- IPC: B29C33/38 ; G03C1/76 ; G03F7/00

Abstract:
Masters for imprint processes are produced by providing a resist layer, and patterning the resist layer after a respective mold pattern to produce a patterned resist layer adapted to be directly used as a master for imprint lithography. Preferably the resist is spin cast on a substrate and is comprised of a photoresist, such as negative-tone, electron-beam sensitive resist having a glass transition temperature above 200° C. and adapted to be mechanically stable to pressures up to 104 psi. Preferably, the resist is a polymer resist, such as an epoxy resist e.g. SU8 and SU8-2000. Patterning the resist layer includes the steps of structuring the resist layer, soft-baking the structured resist layer in order to selectively cross-link the structured portion of the structured resist layer and developing the structured resist layer in order to receive a patterned resist layer. The patterned resist layer is preferably cured e.g. by hard-bake curing in order to increase at least one of the mechanical stability and the glass transition temperature of said patterned resist layer. Structuring may be performed by optical lithography or electron beam lithography.
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