UV‐Cured Acrylic Conductive Inks for Microelectronic Devices

Abstract

UV‐curable inks based on a poly(ethylene glycol) diacrylate (PEGDA) matrix and containing a dispersion of aqueous Ag nanoparticles in different amounts from 10 to 50% are prepared for the fabrication of inkjet printed resistors. The composition is adapted to the inkjet requirements in terms of viscosity, surface tension, and particle size. The gel content, glass transition temperature, conversion, UV‐Vis absorption, morphology, and DC electrical properties of the materials are characterized. It is found that the NPs dispersed in the polymeric matrix realize a percolating path by aligning themselves in chains, which results in a reduction of the percolation threshold. Thus, resistivity is well beyond the dissipative range.

Conductive Nanomaterials for Printed Electronics

“…Combining UV‐curable composition with conductive NPs enables fabrication of conductive 3D patterns . For example, resistors were printed by using UV‐curable inks based on a poly(ethylene glycol) diacrylate (PEGDA) matrix and containing a dispersion of aqueous silver NPs (10 to 50 wt%).…”

“…[ 12,209 ] Combining UV-curable composition with conductive NPs enables fabrication of conductive 3D patterns. [ 210,211 ] For example, resistors were printed by using UV-curable inks based on a poly(ethylene glycol) diacrylate (PEGDA) matrix and containing a dispersion of aqueous silver NPs (10 to 50 wt%). For resistors, the presence of a large amount of insulating materials from the surface of the NPs, and to obtain sintered metal coatings with resistivity comparable to that of bulk metal, for both, silver-based [ 1,73,[84][85][86]91,95,120,160,169,[214][215][216] and copper-based [ 33,73,76,88,96,109,217,218 ] inks.…”

State‐of‐the‐Art and Future Challenges of UV Curable Polymer‐Based Smart Materials for Printing Technologies

“…Since its onset, the UV curing industry has become one of the most rapidly developing ones within the coatings industry . With the introduction of photocuring of coatings as a viable industrial process well over a decade ago, the UV curing industry has followed a line of steady growth …”

3D Printing of Conductive Complex Structures with In Situ Generation of Silver Nanoparticles

“…[ 22 ] The simultaneous formation of inorganic and organic phase allows a good distribution of metal nanoparticles in the polymeric network and limits the nanoparticles size. [ 23 ] The realization of polymer-metal nanocomposites by means of photopolymerization process have been used in several papers to obtain electrical conductive materials, [ 24 ] capacitors, [ 25 ] and materials suitable for electronic. [ 26 ] Here, the paper shows that coupling the photoreduction of metal precursor with the 3D printing technology, allows the fabrication of conductive 3D hybrid structures consisting of metal nanoparticles and organic polymers shaped in a complex multilayered architectures.This could open up several possibilities in a broad range of fi elds and enable the design and creation of geometrically complex objects with tailored topology, and thus, functionality.…”