Inkjet printed flexible user interface module

Koskinen, Santtu; Pykari, Lasse; Mäntysalo, Matti

doi:10.1109/ectc.2012.6248959

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…Inkjet-printed conductors are typically thinner than conventional copper foils and have a somewhat porous structure, which have been shown to significantly improve performance in bending tests [10]. In addition, flexible circuit board manufactured with inkjet technology has been shown to be capable of replacing an existing flexible circuit board manufactured with conventional methods for example in a mobile phone [11,12]. Therefore inkjet printing is a feasible alternative for manufacturing flexible electronics.…”

Section: Introductionmentioning

confidence: 99%

Inkjet printing in manufacturing of stretchable interconnects

Liimatta

Halonen

Sillanpää

et al. 2014

2014 IEEE 64th Electronic Components and Technology Conference (ECTC)

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Stretchable circuits have the potential to enable integrating electronics in everyday objects, but also skin-like, imperceptible electronic applications. However, manufacturing stretchable electronics requires developing novel manufacturing methods and using novel materials at least as substrate. Since the elastic materials for stretchable electronics are relatively soft, using traditional manufacturing methods becomes more problematic, whereas contactless material deposition by inkjet-printing is unaffected by such material properties. This study concentrates on feasibility analysis of using inkjet printing in manufacturing of stretchable electronics. First, printing related challenges are evaluated by manufacturing test structures with inkjet-printer using silver nanoparticle ink on elastic thermoplastic polyurethane substrate and sintering structures in convection oven. Adhesion between ink and substrate, but also sheet resistance, is evaluated. A minimum sheet resistance approx. of 26 m was obtained, and peak strains of inkjet-printed conductors are found to be between 1.0 % and 1.5 %, but conductivity is observed to be almost fully reversible when strain is released.

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Section: Introductionmentioning

confidence: 99%

Inkjet printing in manufacturing of stretchable interconnects

Liimatta

Halonen

Sillanpää

et al. 2014

2014 IEEE 64th Electronic Components and Technology Conference (ECTC)

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“…Thus the minimum layer thickness for minimized losses has to be at least three times the skin depth at a certain frequency. In addition the physical shape of CPW conductors has to be as rectangular as possible to avoid current jamming at the edges [6]. The electrical properties of conductive inks are determined by the size of the conductive particles, their separation in the printed and cured product, the amount of residues, etc..…”

Section: Introductionmentioning

confidence: 99%

Failure Mode Characterization in Inkjet-Printed CPW Lines Utilizing a High-Frequency Network Analyzer and Post-Processed TDR Analysis

Myllymäki¹,

Putaala²,

Hannu³

et al. 2013

PIER C

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Abstract-Failure mode characterization was applied to coplanar transmission lines by utilizing 0.5-10-GHz S-parameter measurements and post-calculated TDR (Time-Domain-Reflectometry) analysis. Coplanar waveguide transmission lines were inkjet-printed on 1.0-mmthick flexible plastic RF substrates. Inductive, resistive, and capacitive types of failures -as the main failure modes caused by manufacturing, bending, or thermal cycling stresses -were investigated. The inkjetprinted CPW (Co-Planar Waveguide) lines were damaged by inductive shorts due to mechanical hitsor resistive and capacitive failures due to bending of the substrate. By using the TDR method the type and physical location of the failure can be determined.

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