Zackary Davis | Danish Technological Institute: Why do highly conductive screen-printable metal inks fail the industry-standard crease and bending tests?
00:05:56 - 00:07:12
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Why do highly conductive screen-printable metal inks fail the industry-standard crease and bending tests?
Developing reliable, flexible electronics requires balancing electrical conductivity with mechanical robustness. Zackary Davis explains how the Danish Technological Institute addresses this by combining copper nanoparticles, microparticles, and flakes in a single screen-printable formulation to optimize performance.
Standard copper formulations often degrade during severe mechanical stress such as crease and bending tests. By engineering the morphological distribution of the metallic components, DTI improves mechanical flexibility and adhesion without sacrificing electrical conductivity.
Additionally, the presentation highlights transparent conductor inks formulated from silver nanowires. Engineered with extremely low active loading, these inks achieve up to 90% transparency alongside a highly competitive sheet resistance of approximately 50 ohms per square.
In this short video, you can learn:
* How a hybrid morphology of copper nanoparticles, microparticles, and flakes improves mechanical performance.
* Why standard conductive inks fail industry-standard bending and crease tests.
* How to achieve 90% optical transparency with silver nanowire-based inks.
š **Clip Abstract** Zackary Davis explains how optimizing ink formulations with multi-scale metallic structures improves mechanical performance under extreme stress tests. The clip details copper flake-and-particle mixtures and low-loading silver nanowire inks for highly transparent conductive films.
#HybridCopperInks, #SilverNanowires, #CreaseResistance, #ScreenPrintableInks, #PrintedElectronics, #FlexibleElectronics
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00:09:28 - 00:11:03
How does ink rheology prevent optical distortion in transparent interactive touch screens?
How does ink rheology prevent optical distortion in transparent interactive touch screens?
In printed electronics, creating transparent, interactive touch interfaces requires pristine material deposition. Zackary Davis outlines the development of a fully transparent touch panel containing integrated LEDs, highlighting the hurdles encountered during the screen-printing phase.
Initial attempts to screen-print transparent conductive inks yielded unacceptable surface roughness and optical distortion. To overcome this, the engineering team had to strictly optimize the ink rheology to ensure uniform, highly homogeneous self-leveling coatings.
Furthermore, laser micro-machining was deployed to pattern the silver nanowire networks on PET foils. This precise subtractive processing allows the conductive traces to remain completely invisible to the human eye, maintaining the panel's seamless optical clarity.
In this short video, you can learn:
* The critical role of ink rheology in eliminating surface roughness in printed optics.
* How laser micro-machining is used to structure transparent conducting films.
* The process of combining silver nanowires, LEDs, and touch interfaces on flexible PET.
š **Clip Abstract** This clip explores the engineering challenges of producing highly uniform transparent interactive touch panels. It details how rheological optimization and laser patterning prevent trace visibility and maintain high optical clarity.
#InkRheology, #SilverNanowires, #LaserMicromachining, #ScreenPrintedElectronics, #TransparentConductiveFilms, #FlexibleElectronics
00:13:40 - 00:15:38
Can carbon-based formulations outperform silver-silver chloride in smart textile washability tests?
Can carbon-based formulations outperform silver-silver chloride in smart textile washability tests?
Washability is the ultimate survival test for any wearable electronic device. Zackary Davis presents two primary integration pathways for e-textiles: laminating printed thermoplastic polyurethane (TPU) foils directly onto fabrics, versus a full multi-layer transfer printing process using a hot press.
The presentation compares standard silver-silver chloride EMG electrodes against newly developed conductive carbon-based alternatives. While silver chloride electrodes deteriorate rapidly after only five to ten washes due to chemical and mechanical degradation, the carbon-based structures show zero degradation.
Even after undergoing sixty rigorous industrial washing cycles, the carbon electrodes maintain consistent resistance values. This breakthrough delivers robust electromyography (EMG) signal acquisition at a fraction of the lifetime cost of traditional precious-metal sensors.
In this short video, you can learn:
* The key differences between TPU foil lamination and multi-layer hot-press transfer processes for e-textiles.
* Why silver-silver chloride electrodes fail rapidly in standard laundry wash cycles.
* How conductive carbon formulations achieve stable EMG performance over sixty washes.
š **Clip Abstract** This clip contrasts the manufacturing methods and wash performance of silver and carbon electrodes on smart textiles. It demonstrates that carbon-based inks can survive 60 washes with zero degradation while matching silver's electronic performance.
#ConductiveCarbonInks, #EMGElectrodes, #TPULamination, #ETextiles, #PrintedElectronics, #FlexibleElectronics