Synthesis and characterization of hyperbranched polymers with increased chemical versatility for imprint lithographic resists
2008 (English)In: Journal of Polymer Science Part A: Polymer Chemistry, ISSN 0887-624X, E-ISSN 1099-0518, Vol. 46, no 18, 6238-6254 p.Article in journal (Refereed) Published
Hyperbranched polymers were prepared from a variety of mono- and difunctional monomers and used in the development of novel UV-imprint lithography (UV-IL) resists. The unique physical and chemical properties of these hyperbranched materials significantly increase the range of molecular systems that could be imprinted. Traditional challenges, such as the use of monomers that have low boiling points or the use of insoluble/highly crystalline momomers, are overcome by the preparation of hyperbranched polymers that incorporate these repeat units. In addition, the low viscosity of the hyperbranched macromolecules and the large number of reactive chain ends overcome many difficulties that are traditionally associated with the use of polymeric materials as imprint resists. Hyperbranched polymers containing up to 12 mol % pendant vinyl groups, needed for secondary crosslinking during imprinting, were prepared with a wide range of repeat unit structures and successfully imprinted with features from tens of microns to similar to 100 nm.
Place, publisher, year, edition, pages
2008. Vol. 46, no 18, 6238-6254 p.
hyperbranched, imprint lithography, living radical polymerization, photopolymerization, resists, branched poly(methyl methacrylate)s, free-radical copolymerization, room-temperature, divinyl monomers, vinyl-polymers, cross-linkers, star, polymers, low-pressure, polymerization, step
IdentifiersURN: urn:nbn:se:kth:diva-17834DOI: 10.1002/pola.22934ISI: 000259325100026ScopusID: 2-s2.0-51449088227OAI: oai:DiVA.org:kth-17834DiVA: diva2:335879
QC 201005252010-08-052010-08-05Bibliographically approved