Abstract
Electrospray printing is a low-cost additive manufacturing technique that uses a high-electric potential to generate a spray of charged, solvent encapsulated solute particles. The solvent rapidly evaporates in-flight, depositing the dry solute material onto a target surface. Over time, the material aggregates to create thin, continuous films. Here, we report on the printing of polymeric (polyimide) films onto two target substrates: flat silicon wafers and industry-standard bond wires and pads. Unlike other spray-coating processes, electrospray is driven by the electric field, and the emitted droplets/particles are guided to the target surface by electric field lines. This enables the coating to wrap around complex geometries to deliver material to non-line-of-sight surfaces. The films showed high conformality around the complex geometries of the bond packages. The printed coatings also exhibited good dielectric strength (up to 142 V/µm), increased hydrophobicity (112° ± 9°), and corrosion resistance improvement up to four times.
Graphical abstract
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
References
T. Mizukoshi, H. Matsumoto, M. Minagawa, A. Tanioka, Control over wettability of textured surfaces by electrospray deposition. J. Appl. Polym. Sci. 103(6), 3811–3817 (2007). https://doi.org/10.1002/app.25191
E. Burkarter, C.K. Saul, F. Thomazi, N.C. Cruz, L.S. Roman, W.H. Schreiner, Superhydrophobic electrosprayed PTFE. Surf. Coat. Technol. 202(1), 194–198 (2007). https://doi.org/10.1016/j.surfcoat.2007.05.012
Y. Jiang et al., All electrospray printed perovskite solar cells. Nano Energy 53, 440–448 (2018). https://doi.org/10.1016/j.nanoen.2018.08.062
H. Liu et al., Synthesis and characterization of optically transparent semi-aromatic polyimide films with low fluorine content. Polymer (Guildf) 163, 106–114 (2019). https://doi.org/10.1016/j.polymer.2018.12.045
P. Ma et al., A review on high temperature resistant polyimide films: heterocyclic structures and nanocomposites. Compos. Commun. 16, 84–93 (2019). https://doi.org/10.1016/j.coco.2019.08.011
P. Lv, Z. Dong, X. Dai, H. Wang, X. Qiu, Synthesis and properties of ultralow dielectric porous polyimide films containing adamantane. J. Polym. Sci. A: Polym. Chem. 56(5), 549–559 (2018). https://doi.org/10.1002/pola.28928
H. Wu et al., Magnetron-sputtered fluorocarbon polymeric film on magnesium for corrosion protection. Surf. Coat. Technol. 352, 437–444 (2018). https://doi.org/10.1016/J.SURFCOAT.2018.08.043
M.E. Alf et al., Chemical vapor deposition of conformal, functional, and responsive polymer films. Adv. Mater. 22(18), 1993–2027 (2009). https://doi.org/10.1002/adma.200902765
N. Chen, D. Han Kim, P. Kovacik, H. Sojoudi, M. Wang, K.K. Gleason, Polymer thin films and surface modification by chemical vapor deposition: recent progress. Annu. Rev. Chem. Biomol. Eng. 7, 373–393 (2016). https://doi.org/10.1146/annurev-chembioeng-080615-033524
A.M. Coclite et al., 25th Anniversary article: CVD polymers: a new paradigm for surface modification and device fabrication. Adv. Mater. 25(38), 5392–5423 (2013). https://doi.org/10.1002/adma.201301878
Y. Zhu, P.R. Chiarot, Structure of nanoparticle aggregate films built using pulsed-mode electrospray atomization. J. Mater. Sci. 54(8), 6122–6139 (2019). https://doi.org/10.1007/s10853-019-03349-3
H. Hu, J.P. Singer, C.O. Osuji, Morphology development in thin films of a lamellar block copolymer deposited by electrospray. Macromolecules 47(16), 5703–5710 (2014). https://doi.org/10.1021/ma500376n
J. Tang, A. Gomez, Control of the mesoporous structure of dye-sensitized solar cells with electrospray deposition. J. Mater. Chem. A 3(15), 7830–7839 (2015). https://doi.org/10.1039/C5TA00288E
J.L. Castillo, S. Martin, D. Rodriguez-Perez, F.J. Higuera, P.L. Garcia-Ybarra, Nanostructured porous coatings via electrospray atomization and deposition of nanoparticle suspensions. J. Aerosol Sci. (2018). https://doi.org/10.1016/j.jaerosci.2018.03.004
J.Y. Park, K.O. Oh, J.C. Won, H. Han, H.M. Jung, Y.S. Kim, Facile fabrication of superhydrophobic coatings with polyimide particles using a reactive electrospraying process. J. Mater. Chem. 22(31), 16005 (2012). https://doi.org/10.1039/c2jm32210b
A.M. Gañán-Calvo, J.M. López-Herrera, M.A. Herrada, A. Ramos, J.M. Montanero, Review on the physics of electrospray: from electrokinetics to the operating conditions of single and coaxial Taylor cone-jets, and AC electrospray. J. Aerosol Sci. 125, 32–56 (2018). https://doi.org/10.1016/J.JAEROSCI.2018.05.002
A. Tycova, J. Prikryl, A. Kotzianova, V. Datinska, V. Velebny, F. Foret, Electrospray: more than just an ionization source. Electrophoresis 42(1–2), 103–121 (2021). https://doi.org/10.1002/elps.202000191
A. Jaworek, A.T. Sobczyk, A. Krupa, Electrospray application to powder production and surface coating. J. Aerosol Sci. 125, 57–92 (2018). https://doi.org/10.1016/J.JAEROSCI.2018.04.006
I.B. Rietveld, K. Kobayashi, H. Yamada, K. Matsushige, Morphology control of poly(vinylidene fluoride) thin film made with electrospray. J. Colloid Interface Sci. 298(2), 639–651 (2006). https://doi.org/10.1016/J.JCIS.2005.12.028
B.J. Kingsley, E.E. Pawliczak, T.R. Hurley, P.R. Chiarot, Electrospray printing of polyimide films using passive material focusing. ACS Appl. Polym. Mater. 3(12), 6274–6284 (2021). https://doi.org/10.1021/acsapm.1c01073
M. Khalilur Rahman, T. Huy Phung, S. Oh, S. Hyun Kim, T. Nga Ng, K.-S. Kwon, High-efficiency electrospray deposition method for nonconductive substrates: applications of superhydrophobic coatings. ACS Appl. Mater. Interfaces 13, 18227–18236 (2021). https://doi.org/10.1021/acsami.0c22867
E. Bodnár, J. Rosell-Llompart, Growth dynamics of granular films produced by electrospray. J. Colloid Interface Sci. 407, 536–545 (2013). https://doi.org/10.1016/j.jcis.2013.06.013
R.A. Green-Warren et al., Determining the self-limiting electrospray deposition compositional limits for mechanically tunable polymer composites. ACS Appl. Polym. Mater. (2022). https://doi.org/10.1021/acsapm.2c00106
D.A. Kovacevich et al., Self-limiting electrospray deposition for the surface modification of additively manufactured parts. ACS Appl. Mater. Interfaces 12(18), 20901–20911 (2020). https://doi.org/10.1021/acsami.9b23544
L. Lei et al., Obtaining thickness-limited electrospray deposition for 3D coating. ACS Appl. Mater. Interfaces 10(13), 11175–11188 (2018). https://doi.org/10.1021/acsami.7b19812
Y. Zhu, P.R. Chiarot, Surface charge accumulation and decay in electrospray printing. J. Phys. D: Appl. Phys. (2021). https://doi.org/10.1088/1361-6463/ABC449
B.J. Kingsley, E.E. Pawliczak, T.R. Hurley, P.R. Chiarot, Electrospray printing of polyimide films for electronics packaging applications, in 2022 IEEE 72nd Electronic Components and Technology Conference (ECTC) (2022), pp. 1906–1913. https://doi.org/10.1109/ECTC51906.2022.00299
S. Diaham, S. Zelmat, M.-L. Locatelli, S. Dinculescu, M. Decup, T. Lebey, Dielectric breakdown of polyimide films: area, thickness and temperature dependence. IEEE Trans. Dielectr. Electr. Insul. 17(1), 18–27 (2010). https://doi.org/10.1109/TDEI.2010.5411997
DuPontTM, DuPontTM Kapton® summary of properties (2021)
H. Kizil, M.O. Pehlivaner, L. Trabzon, Surface plasma characterization of polyimide films for flexible electronics. Adv. Mater. Res. 970, 132–135 (2014). https://doi.org/10.4028/www.scientific.net/AMR.970.132
Acknowledgments
Financial support for this research was provided by the Semiconductor Research Corporation (SRC). Our thanks to our industry mentors Yasmine Yan (TI), Sean Chang (TI), and Varughese Mathew (NXP) for their outstanding support and guidance. Our thanks to the Analytical and Diagnostics Laboratory at SUNY Binghamton. PRC acknowledges the financial support of the National Science Foundation (Award #1554038).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
There is no conflict of interest in this work.
Rights and permissions
Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Pawliczak, E.E., Kingsley, B.J. & Chiarot, P.R. Structure and properties of electrospray printed polymeric films. MRS Advances 7, 635–640 (2022). https://doi.org/10.1557/s43580-022-00340-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/s43580-022-00340-0