Confinement and flow dynamics in thin polymer films for nanoimprint lithography
Author(s) -
Jérémie Teisseire,
Amélie Revaux,
M. Foresti,
Étienne Barthel
Publication year - 2011
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.3535614
Subject(s) - nanoimprint lithography , materials science , rheology , relaxation (psychology) , lithography , thin film , nanolithography , glass transition , viscosity , polymer , volumetric flow rate , nanotechnology , flow (mathematics) , newtonian fluid , composite material , optoelectronics , fabrication , mechanics , psychology , social psychology , medicine , alternative medicine , physics , pathology
International audienceIn nanoimprint lithography (NIL) viscous flow in polymeric thin films is the primary mechanism for the generation and the relaxation of the structures. Here we quantify the impact of confinement on the flow rate. Pattern relaxation experiments were carried out above the glass transition temperature as a function of film thickness. The results are adequately fitted by a simple expression for the flow rate valid at all confinements. This expression, based on Newtonian viscosity, should be of use in NIL process design and for the measurement of the rheological properties of confined polymers
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