Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Innovative Infrared System Dries and Sinters Printed Electronics Almost 2000 Times Faster than Previously

02.03.2016
  • Heraeus develops custom-built IR module
  • Successful tests carried out at TU Chemnitz with inkjet silver nano particle inks using the roll-to-roll printing process

The continuous printing of electronics for displays or solar cells, depends on a rapid drying of the surface and good conductivity of the silver inks. A newly developed infrared module from Heraeus Noblelight achieves this in significantly less than one second (0.32 secs) and is consequently almost 2000 times faster than conventional drying techniques.


Infrared emitters dry and sinter within 0.32 seconds.

Copyright Heraeus Noblelight 2016

Heraeus developed and installed the made-to-measure module in a roll-to-roll printing system. In tests, the infrared radiation proved far superior to drying and sintering using conventional hot plates or hot air ovens. These trials were carried out in the Department of Digital Printing and Graphics Technology of Chemnitz Technical University and the Fraunhofer Institute for Electronic Nanosystems.

Heraeus will be presenting this exciting innovation, together with other UV, Infrared, and Flashlamp systems for the printed electronics sector at the Lopec exhibition in Munich in April 2016.

Metallic nano particles for printed electronics are often deposited onto flexible and polymeric materials using Inkjet printing and are then dried and sintered. On a laboratory scale, this is mostly achieved using hot plates or hot air. However, for mass production, the Roll-to-Roll (R2R) technique must be used. And this means that drying and sintering must be significantly faster.

New techniques have been investigated, such as microwaves, lasers, Intense Pulse Light (IPL) and infrared radiation. The optimum technique must be able to dry and sinter quickly and efficiently, while at the same time causing no damage to the polymer substrate, which is often temperature sensitive.

Heraeus has developed a purpose-built infrared module for an R2R printing system. This has been used to carry out tests on the infrared drying and sintering of inkjet printed silver coatings on polyethylene naphtalate. (PEN). It could be shown that the post treatment of the freshly printed deposit led to a conductivity of up to 15% of pure silver.

Compared with drying and sintering with conventional hot plates or hot air, infrared radiation achieved twice the conductivity in only 0.32 seconds. In contrast, using a hot plate, drying and sintering took about ten minutes.

Using electron microscope imaging, the microstructure of the sintered silver particles was then analyzed in relation to the IR parameters (filament temperature of the emitter, duration and power of the radiation and distance of the emitter and reflector from the substrate.)

After optimizing these parameters, the silver was then dried at 50 kW/m2 and sintered at 150 kW/m2. Using the same short wave emitter each time, merely requiring control adjustment. The printed electronics on the continuous foil can therefore be dried and sintered in one stage, at high belt speeds of up to 1 m/sec and an irradiation time of less than 0.32 seconds.

This research and development work was recently published in the Journal Materials Chemistry C: E. Sowade, H. Kang, K.Y. Mitra, O.J. Weiß, J. Weber, R.R. Baumann, Roll-to-roll infrared (IR) drying and sintering of an inkjet-printed silver nanoparticle ink within 1 second, J. Mater. Chem. C. 3 (2015) 11815–11826. doi:10.1039/C5TC02291F.

Heraeus, the technology group headquartered in Hanau, Germany, is a leading international family-owned company formed in 1851. With expertise, a focus on innovations, operational excellence and an entrepreneurial leadership, we strive to continuously improve our business performance.

We create high-quality solutions for our clients and strengthen their competitiveness in the long term by combining material expertise with technological know-how. Our ideas are focused on themes such as the environment, energy, health, mobility and industrial applications. Our portfolio ranges from components to coordinated material systems which are used in a wide variety of industries, including the steel, electronics, chemical, automotive and telecommunications industries.

In the 2014 financial year, Heraeus generated product revenues of €3.4 bn and precious metal revenues of €12.2bn euros. With around 12,600 employees worldwide in more than 100 subsidiaries in 38 countries, Heraeus holds a leading position in its global markets.

Heraeus Noblelight GmbH with its headquarters in Hanau and with subsidiaries in the USA, Great Britain, France, China and Australia, is one of the technology- and market-leaders in the production of specialist light sources and systems. In 2014, Heraeus Noblelight had an annual turnover of 137.3 Million € and employed 884 people worldwide. The organization develops, manufactures and markets infrared and ultraviolet emitters, systems and solutions for applications in industrial manufacture, environmental protection, medicine and cosmetics, research, development and analytical measurement techniques.

For further information, please contact:
Technical: Heraeus Noblelight GmbH
Reinhard-Heraeus-Ring 7
D-63801 Kleinostheim
Tel +49 6181/35-8545, Fax +49 6181/35-16 8545
E-Mail hng-infrared@heraeus.com

Press: Dr. Marie-Luise Bopp
Heraeus Noblelight GmbH,
Abteilung Marketing/Werbung
Tel +49 6181/35-8547, Fax +49 6181/35-16 8547
E-Mail marie-luise.bopp@heraeus.com
www.heraeus-noblelight.com

Dr. Marie-Luise Bopp | Heraeus Noblelight GmbH

More articles from Trade Fair News:

nachricht Solar Collectors from Ultra-High Performance Concrete Combine Energy Efficiency and Aesthetics
16.01.2017 | Fraunhofer-Institut für Solare Energiesysteme ISE

nachricht Energy-Efficient Building Operation: Monitoring Platform MONDAS Identifies Energy-Saving Potential
16.01.2017 | Fraunhofer-Institut für Solare Energiesysteme ISE

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>