Direct Inkjet Printing of Dielectric Ceramic/Polymer Composite Thick Films

Abstract

This article describes the preparation of composite thick films via inkjet printing in one process step. A novel ceramic/polymer ink is developed, suitable for the fabrication of homogeneous dielectric composite thick films. Therefore, a barium strontium titanate (BST) dispersion is prepared and combined with a highly loaded polymer solution afterwards. Ba 0.6 Sr 0.4 TiO 3 is synthesized by a sol-gel method and dispersed in butyl diglycol using a stirred media mill. A poly(methyl methacrylate) (PMMA) solution is prepared in butanone and mixed with the BST dispersion to obtain an ink with a 50:50 volume ratio of BST and PMMA. The ink characteristics and printability are investigated, in particular the drying behavior of the ink at different temperatures and the morphology of the composite thick films.The drying behavior of low viscosity particle suspensions is often influenced by the coffee stain effect. However, for the developed composite ink no coffee stain effect is observed and homogeneous composite thick films are achieved. Afterwards, all-inkjet-printed capacitors are fabricated, using the developed composite ink. Finally, the relative permittivity e r and loss tangent tan d of the composite thick films are determined.

Fabrication and Characterization of Fully Inkjet Printed Capacitors Based on Ceramic/Polymer Composite Dielectrics on Flexible Substrates

“…The composite thick film is then printed on the subsequent day. A single layer BST/PMMA thick film results in a more homogeneous topography and less failures compared to double printed films 33,51 . After a further drying period of 30 min on the printing table, the top electrode is printed with two layers to get a consistently layer on the composite.…”

Fabrication and Characterization of Fully Inkjet Printed Capacitors Based on Ceramic/Polymer Composite Dielectrics on Flexible Substrates

“…The composite thick film is then printed on the subsequent day. A single layer BST/PMMA thick film results in a more homogeneous topography and less failures compared to double printed films 33,51 . After a further drying period of 30 min on the printing table, the top electrode is printed with two layers to get a consistently layer on the composite.…”

Simple Inkjet Process To Fabricate Microstructures of Chitinous Nanocrystals for Cell Patterning

“…While it should be explained by hydrodynamic terms such as the Marangoni flow and the Weber and Reynolds numbers, it phenomenologically is observed that deposits with a concave cross section are formed after droplets are dried on the solid surface . Thus, desired shaping by inkjet is often impaired, but it can be prevented by control of drying behavior of ink and patterning procedure. , …”

“…30 Thus, desired shaping by inkjet is often impaired, but it can be prevented by control of drying behavior of ink and patterning procedure. 31,32 Figure 6b shows an image of a dot-like molded object formed with 10 droplets. From the cross-sectional view, the fine molded product was convex.…”

Material jetting for advanced applications: A state-of-the-art review, gaps and future directions

“…Investigations into electromagnetic responsive ink consisting of iron oxide nanoparticles within a UV-curable matrix resin had been conducted [49]. Several works with dielectric inkjet inks have been reported as well [9,50]. Saleh et al inkjet-printed a checkered pattern of carbon black ink and UV-curable monomer and tailored the dielectric properties of this composite layer by varying the ratio of the carbon ink and polymer [49].…”

Fabrication and Characterization of Fully Inkjet Printed Capacitors Based on Ceramic/Polymer Composite Dielectrics on Flexible Substrates

“…The composite thick film is then printed on the subsequent day. A single layer BST/PMMA thick film results in a more homogeneous topography and less failures compared to double printed films 33,51 . After a further drying period of 30 min on the printing table, the top electrode is printed with two layers to get a consistently layer on the composite.…”

Simple Inkjet Process To Fabricate Microstructures of Chitinous Nanocrystals for Cell Patterning

“…While it should be explained by hydrodynamic terms such as the Marangoni flow and the Weber and Reynolds numbers, it phenomenologically is observed that deposits with a concave cross section are formed after droplets are dried on the solid surface . Thus, desired shaping by inkjet is often impaired, but it can be prevented by control of drying behavior of ink and patterning procedure. , …”

“…30 Thus, desired shaping by inkjet is often impaired, but it can be prevented by control of drying behavior of ink and patterning procedure. 31,32 Figure 6b shows an image of a dot-like molded object formed with 10 droplets. From the cross-sectional view, the fine molded product was convex.…”

Material jetting for advanced applications: A state-of-the-art review, gaps and future directions

“…Investigations into electromagnetic responsive ink consisting of iron oxide nanoparticles within a UV-curable matrix resin had been conducted [49]. Several works with dielectric inkjet inks have been reported as well [9,50]. Saleh et al inkjet-printed a checkered pattern of carbon black ink and UV-curable monomer and tailored the dielectric properties of this composite layer by varying the ratio of the carbon ink and polymer [49].…”

Fabrication and Characterization of Fully Inkjet Printed Capacitors Based on Ceramic/Polymer Composite Dielectrics on Flexible Substrates

“…The composite thick film is then printed on the subsequent day. A single layer BST/PMMA thick film results in a more homogeneous topography and less failures compared to double printed films 33,51 . After a further drying period of 30 min on the printing table, the top electrode is printed with two layers to get a consistently layer on the composite.…”

Simple Inkjet Process To Fabricate Microstructures of Chitinous Nanocrystals for Cell Patterning

“…While it should be explained by hydrodynamic terms such as the Marangoni flow and the Weber and Reynolds numbers, it phenomenologically is observed that deposits with a concave cross section are formed after droplets are dried on the solid surface . Thus, desired shaping by inkjet is often impaired, but it can be prevented by control of drying behavior of ink and patterning procedure. , …”

“…30 Thus, desired shaping by inkjet is often impaired, but it can be prevented by control of drying behavior of ink and patterning procedure. 31,32 Figure 6b shows an image of a dot-like molded object formed with 10 droplets. From the cross-sectional view, the fine molded product was convex.…”

Material jetting for advanced applications: A state-of-the-art review, gaps and future directions

“…Investigations into electromagnetic responsive ink consisting of iron oxide nanoparticles within a UV-curable matrix resin had been conducted [49]. Several works with dielectric inkjet inks have been reported as well [9,50]. Saleh et al inkjet-printed a checkered pattern of carbon black ink and UV-curable monomer and tailored the dielectric properties of this composite layer by varying the ratio of the carbon ink and polymer [49].…”