Mobile phones and smart phones still haven‘t been adapted to the carrying habits of their users. The displays of the innumerable phones and pods are rigid and do not yield to the anatomical forms adopted by the people carrying them. By now it is no longer any secret that the big players in the industry are working on flexible displays.
How to produce suitable coatings for those cost-efficiently will be demonstrated by INM – Leibniz-Institute for New Materials at stand B46 in hall 2 at this year's Hannover Messe as part of the leading trade fair for R & D and Technology Transfer which takes place from 25th to 29th April.
The INM will be presenting flexible touch screens, which are printed on thin plastic foils with recently developed nanoparticle inks, using transparent, conductive oxides (TCOs). These inks are suitable for a one-step printing process.
Thus transparent lines and patterns are obtained by inkjet printing or alternatively by direct gravure printing, which are electrically conductive even after bending. Thus, a one-step-printing process for cost-efficient TCO structures is enabled.
Conductive coatings with TCOs are usually applied by means of high vacuum techniques such as sputtering. For patterning of the TCO coatings additional cost-intensive process steps are necessary, for example photolithography and etching.
“We use the TCOs to produce nanoparticles with special properties,” explains Peter William de Oliveira, Head of the Optical Materials Program Division. “The TCO ink is then created by adding a solvent and a special binder to these TCO particles. The binder performs several tasks here: it not only makes the TCO nanoparticles adhere well on the substrate; it also increases the flexibility of the TCO coating: in this way, the conductivity is maintained even when the films are bent”.
The ink can be applied to the film directly by inkjet or gravure printing. After curing under UV light at low temperatures less than 130 degrees centigrade, the coating is completed.
The transparent, electronically conductive inks allow conductor tracks to be produced unproblematically even on a large scale by means of classic reel-to-reel processes. Initial trials at INM have been promising. The researchers all agree that the use of structured rollers will in the future allow large, structured conductive surfaces to be printed with a high throughput at low cost.
Your contact at the Booth:
Dr. Michael Opsölder
Your expert at INM:
Dr. Peter William de Oliveira
INM – Leibniz Institute for New Materials
Head Optical Materials
Head InnovationCenter INM
INM conducts research and development to create new materials – for today, tomorrow and beyond. Chemists, physicists, biologists, materials scientists and engineers team up to focus on these essential questions: Which material properties are new, how can they be investigated and how can they be tailored for industrial applications in the future? Four research thrusts determine the current developments at INM: New materials for energy application, new concepts for medical surfaces, new surface materials for tribological applications and nano safety and nano bio. Research at INM is performed in three fields: Nanocomposite Technology, Interface Materials, and Bio Interfaces.
INM – Leibniz Institute for New Materials, situated in Saarbruecken, is an internationally leading centre for materials research. It is an institute of the Leibniz Association and has about 220 employees.
Dr. Carola Jung | idw - Informationsdienst Wissenschaft
Creating living spaces for people: The »Fraunhofer CityLaboratory« at BAU 2017
14.10.2016 | Fraunhofer-Gesellschaft
Reducing Weight through Laser-assisted Material Processing in Automobile Construction
13.10.2016 | Fraunhofer-Institut für Lasertechnik ILT
Physicists from the University of Würzburg have designed a light source that emits photon pairs. Two-photon sources are particularly well suited for tap-proof data encryption. The experiment's key ingredients: a semiconductor crystal and some sticky tape.
So-called monolayers are at the heart of the research activities. These "super materials" (as the prestigious science magazine "Nature" puts it) have been...
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
28.10.2016 | Power and Electrical Engineering
28.10.2016 | Physics and Astronomy
28.10.2016 | Life Sciences