Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Coated Surfaces for Inkjet-Printed Conductors
Mid Sweden University, Faculty of Science, Technology and Media, Department of applied science and design. (DPC)ORCID iD: 0000-0003-2340-2363
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. , ix, 28 p.
Series
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 84
Keyword [en]
Inkjet, Nanoparticles, Paper, Flexible substrates, Sintering, Printed Electronics, Functional Printing
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:miun:diva-16449ISBN: 978-91-87103-22-3 (print)OAI: oai:DiVA.org:miun-16449DiVA: diva2:533814
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
List of papers
1. Sintering Methods for Metal Nanoparticle Inks on Flexible Substrates
Open this publication in new window or tab >>Sintering Methods for Metal Nanoparticle Inks on Flexible Substrates
2009 (English)In: NIP 25: DIGITAL FABRICATION 2009, TECHNICAL PROGRAM AND PROCEEDINGS, The Society for Imaging Science and Technology, 2009, 614-617 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper a number of selective sintering methods suitable for inkjet printed nanoparticles are demonstrated on two different coated papers. The selective methods demonstrated here are electric current heating, microwave sintering and photonic curing. As a reference, conventional heat chamber sintering is also included. Conductivity measurements and studies of sintered structures with optical and scanning electron microscopy are performed, as well as a qualitative evaluation of how the heat-sensitive substrates are affected. The purpose is to analyze characteristics of each method and gain insight in how different process parameters affect overall performance and reliability. With heat chamber sintering the best achievable conductivity without substrate deformation corresponded to less than 20% of pure silver. With some selective methods, conductivity reached well above 50% of pure silver.

 

 

Place, publisher, year, edition, pages
The Society for Imaging Science and Technology, 2009
Keyword
silver nanoink, sintering
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Other Materials Engineering
Identifiers
urn:nbn:se:miun:diva-10154 (URN)000279358900167 ()2-s2.0-77952635220 (Scopus ID)978-089208287-2 (ISBN)
Conference
NIP25: 25th International Conference on Digital Printing Technologies and Digital Fabrication 2009; Louisville, KY; 20 September 2009 through 24 September 2009; Code 80244
Available from: 2009-10-21 Created: 2009-10-21 Last updated: 2016-10-05Bibliographically approved
2. Evaluation of InkAid surface treatment to enhance print quality of ANP silver nano-particle ink on plastic substrates
Open this publication in new window or tab >>Evaluation of InkAid surface treatment to enhance print quality of ANP silver nano-particle ink on plastic substrates
Show others...
2010 (English)In: Large Area, Organic & Printed Electronics (LOPE-C) 2010, Frankfurt, 2010, 241-245 p.Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Frankfurt: , 2010
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-12261 (URN)978-3-00-029955-1 (ISBN)
Conference
LOPE-C
Available from: 2010-11-22 Created: 2010-11-22 Last updated: 2016-10-05Bibliographically approved
3. The importance of surface characteristics for structure definition of silver nanoparticle ink patterns on paper surfaces
Open this publication in new window or tab >>The importance of surface characteristics for structure definition of silver nanoparticle ink patterns on paper surfaces
2010 (English)In: NIP26 and Digital Fabrication, Austin: The Society for Imaging Science and Technology, 2010, 309-313 p.Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Austin: The Society for Imaging Science and Technology, 2010
National Category
Materials Engineering
Identifiers
urn:nbn:se:miun:diva-12263 (URN)2-s2.0-79955715827 (Scopus ID)978-089208293-3 (ISBN)
Conference
26th International Conference on Digital Printing Technologies, NIP26 and 6th International Conference on Digital Fabrication 2010, DF 2010; Austin, TX; 19 September 2010 through 23 September 2010; Code 84729
Available from: 2010-11-22 Created: 2010-11-22 Last updated: 2016-10-05Bibliographically approved
4. Evaluation of coatings applied to flexible substrates to enhance quality of ink jet printed silver nano-particle structures
Open this publication in new window or tab >>Evaluation of coatings applied to flexible substrates to enhance quality of ink jet printed silver nano-particle structures
Show others...
2012 (English)In: IEEE Transactions on Components, Packaging, and Manufacturing Technology, Part C, ISSN 1083-4400, E-ISSN 1558-1241, Vol. 2, no 2, 342-348 p.Article 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.

Keyword
Flexible Printed Circuits, Nanoparticles, Conductive ink
National Category
Nano Technology
Identifiers
urn:nbn:se:miun:diva-15019 (URN)10.1109/TCPMT.2011.2176125 (DOI)000300196600019 ()2-s2.0-84859037507 (Scopus ID)STC (Local ID)STC (Archive number)STC (OAI)
Available from: 2011-12-02 Created: 2011-12-02 Last updated: 2017-12-08Bibliographically approved
5. Paper Surfaces for Metal Nanoparticle Inkjet Printing
Open this publication in new window or tab >>Paper Surfaces for Metal Nanoparticle Inkjet Printing
2012 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 259, 731-739 p.Article in journal (Refereed) Published
Abstract [en]

The widespread usage of paper and board offer largely unexploited possibilities for printed electronics applications. Reliability and performance of printed devices on comparatively rough and inhomogenous surfaces of paper does however pose challenges.Silver nanoparticle ink has been deposited on ten various paper substrates by inkjet printing. The papers are commercially available, and selected over a range of different types and construction. A smooth nonporous polyimide film was included as a nonporous reference substrate. The substrates have been characterized in terms of porosity, absorption rate, apparent surface energy, surface roughness and material content. The electrical conductivity of the resulting printed films have been measured after drying at 60°C and again after additional sintering at 110°C. A qualitative analysis of the conductivity differences on the different substrates based on surface characterization and SEM examination is presented. Measurable parameters of importance to the final conductivity are pointed out, some of which are crucial to achieve conductivity. When certain criteria of the surfaces are met, paper media can be used as low cost, but comparably high performance substrates for metal nanoparticle inks in printed electronics applications.

Keyword
printed electronics, inkjet printing, paper substrates, flexible substrates, nanoparticles, conductive inks
National Category
Nano Technology
Identifiers
urn:nbn:se:miun:diva-16448 (URN)10.1016/j.apsusc.2012.07.112 (DOI)000310436900110 ()2-s2.0-84866051319 (Scopus ID)STC (Local ID)STC (Archive number)STC (OAI)
Available from: 2012-06-14 Created: 2012-06-14 Last updated: 2017-12-07Bibliographically approved

Open Access in DiVA

fulltext(1181 kB)1166 downloads
File information
File name FULLTEXT01.pdfFile size 1181 kBChecksum SHA-512
5573e886d31f6afa2200eeac66325e09e04f60199417025f164d33118c22aaab60290a12bef45295593d85bfd249bc76c2d44d9fad5c5d074dd105ea4a67f833
Type fulltextMimetype application/pdf