Wevolver | Additive Electronics Articles

Ultra-Precise Deposition for the Fabrication of Next-Generation MicroLED and QD-LED Displays

A unique new approach of printing functional materials with unparallel precision and repeatability. Technology called Ultra-Precise Deposition (UPD) is a nanodispensing method capable to print high density and high viscous materials with the resolution down to 1 µm in feature size and with high ratio of width to height after single pass. For this method material extrusion is controlled by a pressure, which means it is not supported with high electric field. Thanks to this there are no limitation if the substrate is conductive or dielectric.

Microfluidics and Electrohydrodynamic printing (EHD)?

EHD is a promising digital printing technology for going beyond the resolution limits of inkjet. Most examples showcase electronic or display related applications.

Additive and high-throughput nanoscale multi-layer printing materials and devices on any substrate?

Nano-Ops is commercialising an automated wafer-based process and fab-in-a-box based on the directed assembly technology which can 'print' features down to 20nm. Here, In the first step a pattern is first etched into a template wafer.

Printed wrap-around electrodes for microLEDs

To scale up microLED displays to large areas, smaller displays can be titled. Because microLEDs can be truely edge-less devices, the tiling can function, yielding a seemless look.

Stretchable Electronic Materials For Wearable Applications

Stretchable Electronics and inks for durable wearable electronics. These inks can be printed on TPU films which can be bonded to fabrics. This results in devices that stretch without cracking and maintain excellent electrical properties. Examples include biometric sensors & fixed resistance heaters

Ag Nanoparticle Inks: Achieving Ever Higher Conductivity at Lower Curing Time and Temperature

Silver nanoparticle inks improve every year. These improvements are often incremental, but very important. One ever-present direction of development is towards inks which offer ever higher conductivity levels at a low curing temperature and a short curing time. This a critical figure of merit because it opens more substrate choices, saves time, and lowers energy consumption costs.

Printed battery technology: thin, flexible, and low cost for everyday objects

Printed batteries offer thinness and flexibility, enabling new applications, but their production is deceivingly complex. Gunter Hübner from Stuttgart Media University offered some insights at the e-Swiss conference last week.

Comparison of Inkjet and Extrusion Printed Tattoo Electrodes for Biomedical Applications

Experimenting in the world of Flexible Hybrid Electronics (FHE) comes with a variety of hurdles. Printing technologies are vastly different in terms of materials compatibility and have pros and cons that make them suitable for particular applications. Choosing materials that match the printing technology you intend to use is the most important decision you’re going to make. But what if one could print, digitally, using any paste and ink on any substrate? Read more

Will copper nanoparticle inks finally come of age to disrupt the dominance of silver in the conductive paste business?

Cost of production has been a major barrier despite the fact that Cu raw material prices are far lower than Ag. This is because this large raw material cost difference does not often get translated into equally large nanoparticle dispersion or ink costs. Can this be overcome?

Integrate electronic circuits into standard textiles using a mass production techniques?

Warp knitting is an excellent candidate. It combines weaving and weft knitting, allowing the warp knitted fabrics to have the stability of woven fabrics and the elasticity of knitted ones.

Printed package-level shielding for 5G packages and beyond?

Conformal EMI shielding is a megatrend on its way to become ubiquitous in electronics. The incumbent process is based on sputtering a tri-layer structure consisting of SUS on the EMC of the package. In these slides, you can see performance analysis and detailed cost analysis/projections.

How rechargable disposable thin printed batteries can be produced and used to reliability power IoT products?

This article describes the TAeTTOOz printable battery technology developed by Evonik and acquired by InnovationLab for upscaling and mass production. In this article, you can learn about the operating principles, the key working characteristics, the material set, production techniques, and emerging applications of this technology

Why can microLED technology help narrow the energy gap in electronic devices?

Why can microLED technology can help narrow the energy gap in electronic devices? The first slide shows the battery gap- Ahmed (Intel) has collected data by year showing that power demand of phones far exceeds the power supply level of batteries, creating a "battery gap" which ...

Progress of screen printing towards 20um or less?!

The progress of screen printing towards fine line printing has been incredible going from 100 µm features before 2010 to 70 µm to 2015 to 40 µm in 2018 and now pushing - in development- towards 20 µm and less. In parallel, the wet thickness of the printed line have gone down from 12um or so in 2018 to now just 4um.

Gravure print microbumps on wafers for ever-shrinking microLED dies

As microLEDs inevitably shrink in size, the micro-bumping requirements for the microLED dies becomes more challenging. Direct wafer-based printing based on gravure offset techniques offers a promising solution in this regard. Indeed, this is another field where printed electronics can play a role.

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