Philipp Hölzl | ELANTAS Europe: Does laser sintering offer the ultimate path to maximizing the conductivity of screen-printed silver inks without damaging fragile substrates?
00:12:47 - 00:14:10
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Does laser sintering offer the ultimate path to maximizing the conductivity of screen-printed silver inks without damaging fragile substrates?
While thermal curing at low temperatures protects sensitive substrates, it can sometimes limit the final electrical conductivity of printed silver tracks due to incomplete sintering. Applying advanced laser sintering technologies, such as Hamamatsu laser systems, provides a localized energy source that dramatically increases conductivity without elevating bulk substrate temperatures.
Laser sintering works by selectively targeting the metal particles in the ink, fusing them into a highly conductive network within milliseconds. This rapid post-processing technique allows for exceptional electrical performance while keeping overall production line lengths short.
In addition to sintering dynamics, screen printers must manage ink stability on the press to prevent premature drying. Formulating inks that remain open and stable on the mesh at room temperature—requiring a threshold of at least 50°C to initiate drying—ensures high process reliability and operator-friendly manufacturing.
In this short video, you can learn:
* The dramatic electrical conductivity improvements unlocked through localized laser sintering systems.
* How selective laser curing avoids thermal damage to fragile underlying substrates.
* The open-mesh chemistry requirements that prevent premature ink drying during screen printing operations.
📋 **Clip Abstract** This clip explores the benefits of laser sintering systems for boosting the conductivity of printed silver inks. It also addresses the practical rheological requirements for keeping inks stable on the screen printing mesh during production.
#LaserSintering, #ConductiveInks, #OpenMeshChemistry, #SelectiveCuring, #PrintedElectronics, #FlexibleElectronics
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00:03:05 - 00:04:58
Can additive screen printing truly dethrone subtractive aluminum etching in the high-volume RFID antenna market?
Can additive screen printing finally displace subtractive acid etching in high-volume RFID antenna manufacturing?
The industrial production of RFID antennas has long relied on subtractive aluminum etching, a process increasingly burdened by high material costs and intensive chemical consumption. In contrast, screen-printed antennas offer a highly competitive cost structure, particularly as production scales. By transitioning from subtractive chemical processing to direct-write printing, manufacturers can significantly reduce raw material overhead and eliminate the costly chemical consumables inherent to traditional etching lines.
Production throughput remains a critical bottleneck for mass-market RFID adoption, where conventional etching speeds frequently limit overall manufacturing capacity. Screen printing resolves this constraint by enabling high-speed, continuous roll-to-roll (R2R) processing across both wide-web and narrow-web configurations. Depending on the specific machinery setup, these printed electronics lines can achieve web speeds of up to 20 meters per minute, dramatically increasing daily throughput.
From an environmental and regulatory standpoint, the contrast between these two manufacturing methodologies is stark. Traditional etching relies on complex chemical reactions that generate hazardous liquid waste streams requiring intensive treatment. Conversely, screen printing operates as a purely additive manufacturing process, depositing functional conductive inks precisely where needed with virtually zero material waste or chemical byproducts.
In this short video, you can learn:
* How screen-printed antennas achieve superior cost-efficiency compared to etched aluminum in high-volume production.
* The throughput advantages of roll-to-roll screen printing, including achievable web speeds of up to 20 meters per minute.
* The environmental benefits of transitioning from chemical-heavy subtractive etching to zero-waste additive printing.
📋 **Clip Abstract** The speaker presents an internal comparative study evaluating etched aluminum antennas against screen-printed alternatives across cost, production speed, and environmental impact. The analysis highlights that screen printing offers a faster, more cost-effective, and virtually waste-free additive manufacturing route, particularly when deployed via high-speed roll-to-roll processing.
🎤 Speaker: Philipp Hölzl
🏢 Company: ELANTAS Europe
📅 Event: Additive, Sustainable or 3D Electronics Innovations Day 2025
📍 Location: TechBlick Online Platform
🌐 Learn more at the next TechBlick event: https://www.techblick.com
#RollToRollScreenPrinting, #RFIDAntennaManufacturing, #SilverFlakeInks, #AluminumEtching, #PrintedElectronics, #FlexibleElectronics
00:08:33 - 00:10:02
How can lowering curing temperatures to 70°C unlock the use of heat-sensitive paper and ultra-thin PET substrates for flexible electronics?
How can lowering curing temperatures to 70°C unlock the use of heat-sensitive paper and ultra-thin PET substrates for flexible electronics?
Standard conductive silver inks typically require thermal sintering temperatures around 120°C, which can deform low-cost polymer films and scorch delicate paper substrates. By formulating low-temperature solvent-based inks that dry at just 70°C, manufacturers can transition to highly cost-effective, heat-sensitive PET and paper alternatives.
This thermal reduction not only prevents substrate distortion but also slashes energy consumption during the roll-to-roll drying process. Crucially, the process does not require specialized near-infrared (NIR) or infrared (IR) curing stations, functioning efficiently with standard hot-air systems.
Transitioning to paper-based substrates also solves critical lifecycle challenges, enabling plastic-free electronics that are far easier to recycle than traditional plastic-metal laminates. The sheet resistivity profile remains highly dependent on drying duration, requiring careful process tuning to optimize conductivity at these lower temperatures.
In this short video, you can learn:
* The manufacturing advantages of lowering ink drying temperatures from 120°C down to 70°C.
* How low-temperature curing enables the integration of conductive inks with paper and ultra-thin PET films.
* The environmental benefits of producing plastic-free, recyclable paper-based electronic tags.
📋 **Clip Abstract** This clip details the performance of low-temperature solvent-based silver inks capable of curing at 70°C. It discusses how this technology saves energy, protects heat-sensitive substrates, and facilitates the adoption of recyclable paper electronics.
#LowTemperatureCuring, #ConductiveSilverInks, #PaperElectronics, #UltraThinPET, #PrintedElectronics, #RollToRollManufacturing