caa a22 4500 463213580 CHVBK 20180405153149.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s00339-007-4155-x doi (NATIONALLICENCE)springer-10.1007/s00339-007-4155-x Deposition of polyimide precursor by resonant infrared laser ablation [Elektronische Daten] [N.L. Dygert, A.P. Gies, K.E. Schriver, R.F. Haglund Jr.] We report the successful deposition of a polyimide precursor using resonant infrared laser ablation (RIR-LA). A solution of poly(amic acid) (PAA) dissolved in N-methyl-2-pyrrolidinone (NMP), the melt processable precursor to polyimide, was frozen in liquid nitrogen for use as an ablation target in a high-vacuum chamber. Fourier transform infrared spectroscopy was used to determine that the local chemical structure remained unaltered. Gel permeation chromatography demonstrated that the transferred PAA retained its molecular weight, showing that RIR-LA is able to transfer the polymer intact, with no detectable chain fragmentation. These results are in stark contrast to UV-processing which degrades the polymer. After deposition the PAA may be removed with a suitable solvent; however, once the material has undergone cyclodehydration it forms an impenetrable three-dimensional network associated with thermosetting polymers. The transfer of uncured PAA precursor supports the hypothesis that RIR-LA is intrinsically a low temperature process, because the PAA is transferred without reaching the curing temperature. The RIR-LA also effectively removes the solvent NMP from the PAA, during both the ablation and deposition phases; this is a necessary step in generating PI films. Springer-Verlag, 2007 Dygert N.L. Interdisciplinary Program in Materials Science, Vanderbilt University, 37235, Nashville, TN, USA aut Gies A.P. Department of Chemistry, Vanderbilt University, 37235, Nashville, TN, USA aut Schriver K.E. Department of Physics and Astronomy, Vanderbilt University, 37235, Nashville, TN, USA aut Haglund Jr. R.F. Department of Physics and Astronomy, Vanderbilt University, 37235, Nashville, TN, USA aut Applied Physics A Springer-Verlag 89/2(2007-11-01), 481-487 0947-8396 89:2<481 2007 89 339 https://doi.org/10.1007/s00339-007-4155-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-4155-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dygert N.L. Interdisciplinary Program in Materials Science, Vanderbilt University, 37235, Nashville, TN, USA aut NATIONALLICENCE 700 1- Gies A.P. Department of Chemistry, Vanderbilt University, 37235, Nashville, TN, USA aut NATIONALLICENCE 700 1- Schriver K.E. Department of Physics and Astronomy, Vanderbilt University, 37235, Nashville, TN, USA aut NATIONALLICENCE 700 1- Haglund Jr R.F. Department of Physics and Astronomy, Vanderbilt University, 37235, Nashville, TN, USA aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 89/2(2007-11-01), 481-487 0947-8396 89:2<481 2007 89 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer