The present invention is directed to micro- and nano-scale imprinting
methods and the use of such methods to fabricate supported and/or
free-standing 3-D micro- and/or nano-structures of polymeric, ceramic,
and/or metallic materials, particularly for pixel segregation in
OLED-based displays. In some embodiments, a duo-mold approach is employed
in the fabrication of these structures. In such methods, surface
treatments are employed to impart differential surface energies to
different molds and/or different parts of the mold(s). Such surface
treatments permit the formation of three-dimensional (3-D) structures
through imprinting and the transfer of such structures to a substrate. In
some or other embodiments, such surface treatments and variation in glass
transition temperature of the polymers used can facilitate separation of
the 3-D structures from the molds to form free-standing micro- and/or
nano-structures individually and/or in a film. In some or other
embodiments, a "latch-on" assembly technique is utilized to form
supported and/or free-standing stacked micro- and/or nano-structures that
enable the assembly of polymers without a glass transition temperature
and eliminate the heating required to assemble thermoplastic polymers.