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Evaluation of coatings applied to flexible substrates to enhance quality of ink jet printed silver nano-particle structures
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design.
Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design. (DPC)ORCID iD: 0000-0003-2340-2363
Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design. (DPC)
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2012 (English)In: IEEE Transactions on Components, Packaging, and Manufacturing Technology, Part C, ISSN 1083-4400, E-ISSN 1558-1241, Vol. 2, no 2, p. 342-348Article in journal (Refereed) Published
Abstract [en]

Different types of the commercial surface treatment InkAid have been evaluated as a surface treatment to enhance print quality of silver nano-particle ink structures printed on polyimide and polyethene substrate. Originally these coatings have been specified to be applied on substrates for graphical ink jet printing. On the coated polyimide and polyethene substrates lines of different widths have been printed using a Dimatix materials printer together with silver nano-particle ink manufactured by Advanced Nano Products. The prints have then been evaluated in terms of print quality and resistivity before and after sintering. The results show that the application of these coatings can improve the print quality considerably, making it possible to print lines with a good definition, which is not  otherwise possible with this type of ink on this substrate types. It has been found that the coating Semi Gloss provides the best results, both in terms of print quality as well as the lowest resistivity. The resistivity on polyethene is 3.5*10-7Ωm at best when sintered at 150°C and for polyimide  8.9*10-8Ωm sintered at 200°C. This corresponds to a conductivity of about  4.5% and  18%of bulk silver, respectively. It can be concluded that applying such PVP based coatings to polyethene and polyimide will increase the print quality quite substantially, making it possible to print patterns with requirements of smaller line widths and more details than what is possible without coating.

Place, publisher, year, edition, pages
2012. Vol. 2, no 2, p. 342-348
Keywords [en]
Flexible Printed Circuits, Nanoparticles, Conductive ink
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:miun:diva-15019DOI: 10.1109/TCPMT.2011.2176125ISI: 000300196600019Scopus ID: 2-s2.0-84859037507Local ID: STCOAI: oai:DiVA.org:miun-15019DiVA, id: diva2:461206
Available from: 2011-12-02 Created: 2011-12-02 Last updated: 2017-12-08Bibliographically approved
In thesis
1. Coated Surfaces for Inkjet-Printed Conductors
Open this publication in new window or tab >>Coated Surfaces for Inkjet-Printed Conductors
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

In this thesis, a number of commercially available paper substrates of various types are characterized and their characteristics related to the performance of inkjet-printed conductors using silver nanoparticle ink. The evaluated performance variables are electrical conductivity as well as the minimum achievable conductor width and the edge raggedness. It is shown that quick absorption of the ink carrier is beneficial for achieving well defined conductor geometry and high conductivity. Surface roughness with topography variations of sufficiently large amplitude and frequency is detrimental to print definition and conductivity. Porosity is another important factor, where the characteristic pore size is much more important than the total pore volume. A nearly ideal porous coating has large total pore volume but small characteristic pore size, preferably smaller than individual nanoparticles in the ink. Apparent surface energy is important for non-absorbing substrates but of limited importance for coatings with a high absorption rate.Additionally, a concept for improving the geometric definition of inkjet-printed conductors on nonporous films has been demonstrated. By coating the films with polymer–based coatings to provide a means of ink solvent removal, minimum conductor width were reduced a factor 2 or more.Intimately connected to the end performance of printed conductors is a well adapted sintering methodology. A comparative evaluation of a number of selective sintering methods has been performed on paper substrates with different heat tolerance. Pulsed high-power white light was found to be a good compromise between conductivity performance, reliability and production adaptability.The purpose of the work conducted in this thesis is to increase the knowledge base in how surface characteristics of papers and flexible films affect performance of printed nanoparticle structures. This would improve selection, adaption of, or manufacturing of such substrates to suit printed high conductivity patterns such as printed antennas for packaging.

Abstract [sv]

I denna avhandling har ett antal kommersiellt tillgängliga papper av olika typ karaktäriserats och deras egenskaper relaterats till prestandan på inkjet-tryckta elektriska ledare tryckta med silvernanopartikelbläck. De undersökta prestandavariablerna är elektrisk ledningsförmåga samt ledarnas minimala linjebredd och kantjämnhet. Det visas att en snabb absorption av bläckets lösningsmedel är gynnsam för både väldefinierad ledningsgeometri och elektrisk ledningsförmåga. Ytråhet med topografiska variationer med tillräckligt stor amplitud och spatiell frekvens korrelerar negativt med tryckdefinition och ledningsförmåga. Porositet är ytterligare en viktig faktor, där karaktäristisk porstorlek är avsevärt viktigare än total porvolym. Nära ideala egenskaper hos en porös bestrykning synes vara en mycket hög total porvolym men med små individuella porer, med fördel mindre än de minsta metallpartiklarna i bläcket. Ytenergi är mycket betydelsefull för icke-absorberande substrat men tappar nästan all sin betydelse för bestrykningar med snabb absorption.Ett koncept för att förbättra den geometriska definitionen på inkjet-tryckta ledare på icke-porösa flexibla filmer har visats. Genom att bestryka filmerna med vissa polymerbaserade material och därmed införa en mekanism för separering av lösningsmedel och partiklar så reducerades ledarnas minimibredd med en faktor 2 eller mer.Intimt förknippad med den slutliga elektriska prestandan på tryckta ledare är också en väl anpassad sintringsmetodik. En jämförande utvärdering av ett flertal selektiva sintringmetoder har genomförts på papper med olika värmetålighet. Pulsat vitt ljus med hög effekt bedömdes som en bra kompromiss mellan elektriska prestanda, tillförlitlighet och anpassningsbarhet för produktionsmiljö.Nyttan med arbetet som presenteras i denna avhandling är att öka kunskapsbasen för hur pappers och flexibla filmers ytegenskaper påverkar prestandan på inkjet-tryckta nanopartikelstrukturer. Detta möjliggör bättre urval, anpassning av, eller tillverkning av sådana substrat för att passa tryckta mönster med hög konduktivitet; som till exempel tryckta antenner på förpackningar.

Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University, 2012. p. ix, 28
Series
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 84
Keywords
Inkjet, Nanoparticles, Paper, Flexible substrates, Sintering, Printed Electronics, Functional Printing
National Category
Nano Technology
Identifiers
urn:nbn:se:miun:diva-16449 (URN)978-91-87103-22-3 (ISBN)
Presentation
2012-06-07, Mediacenter, Järnvägsgatan 3, Örnsköldsvik, 14:00 (Swedish)
Opponent
Supervisors
Available from: 2012-06-14 Created: 2012-06-14 Last updated: 2012-10-31Bibliographically approved

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Andersson, HenrikLidenmark, CeciliaÖhlund, ThomasÖrtegren, JonasManuilskiy, AnatoliyForsberg, SvenNilsson, Hans-Erik

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Andersson, HenrikLidenmark, CeciliaÖhlund, ThomasÖrtegren, JonasManuilskiy, AnatoliyForsberg, SvenNilsson, Hans-Erik
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Department of Information Technology and MediaDepartment of applied science and design
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IEEE Transactions on Components, Packaging, and Manufacturing Technology, Part C
Nano Technology

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