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 The Micro Nanotech area at MD&M West has been successfully established
22.02.2017 | IVAM Fachverband für Mikrotechnik

nachricht Use your Voice – and Smart Homes will “LISTEN”
21.02.2017 | EML European Media Laboratory GmbH

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: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Microhotplates for a smart gas sensor

22.02.2017 | Power and Electrical Engineering

Scientists unlock ability to generate new sensory hair cells

22.02.2017 | Life Sciences

Prediction: More gas-giants will be found orbiting Sun-like stars

22.02.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>