Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Micropatterning OLEDs using electron beam technology


The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP will be presenting the first micro-OLEDs patterned using electron beam at Booth 1023 during SID Display Week 2016 in San Francisco / USA from May 24 – 26.

Fraunhofer FEP has years of experience in the field of processing organic semiconductor materials. Scientists here are also developing organic light-emitting diodes (OLEDs) and OLED microdisplays based on organic semiconductors.

OLED patterned with an electron beam

© Fraunhofer FEP / Photographer Semper Opera: Christof Lippmann

OLED patterned with an electron beam (Patterning: A. Rudzinski, Raith GmbH)

© Fraunhofer FEP / Photographer: Jürgen Lösel

Currently, techniques and new applications of electron beam technology – an additional area of core expertise at Fraunhofer FEP – are being particularly investigated in the field of organic electronics. Due to their outstanding optical and electronic properties, OLEDs have a broad range of potential applications in mobile electronics and displays.

Especially small displays with high pixel density, such as OLED microdisplays, are necessary for future applications such as augmented- or virtual-reality, for example. Researchers are now working on further miniaturizing while maintaining high resolution.

The patterning of the organic layers in OLEDs represents one of the biggest challenges, as conventional methods such as photolithography cannot be applied to organic semiconductor materials easily.

Fraunhofer FEP scientists have developed a novel approach to pattern the emission area of an OLED at high resolution. The patented technology uses an electron beam process, which takes place after finalizing the OLED including the encapsulation. Therefore it is possible to build the OLED highly productive and completely unpatterned, before the emission is individually modified by an adjusted electron beam process.

The energy of the electrons determines their penetration depth in the layer stack. With a suitable choice of process parameters, the encapsulation can also be penetrated by the electron beam and the luminous characteristics of the organic layers beneath will change without destroying or compromising the encapsulation itself. Depending on the application, it is even possible to modify individual layers directly.

“Continuous gray scales in an image can be created on a monochrome OLED using the electron beam, while at the same time the local current consumption is reduced. The longer the dwell time on one spot with the beam, the darker the OLED will appear there”, explains Elisabeth Bodenstein from the development team at Fraunhofer FEP. “An impressive example is the white OLED shown, in which the image of the famous Dresden Semperoper was structured with the electron beam in a hundred seconds.”

Even with a write time of less than two minutes, an impressive resolution of 12,700 dpi was attained – corresponding to 2 µm spacing of the image dots. The structuring of the OLED was carried out with an electron beam lithography system of Raith GmbH, the leading manufacturer of nanofabrication systems.

The process is highly adaptable – regardless of whether the OLED is applied to a rigid medium or flexible film, what color the OLED is, or whether the substrate is optically opaque, translucent, or transparent. The size of the substrate is universal as well and can be matched to the corresponding application. An enhancement to full-color patterning is being planned.

The Fraunhofer FEP scientists are now prepared to put this new technology into practice with industrial partners. The technology was developed within a project funded by the Fraunhofer Gesellschaft.

Fraunhofer FEP at the SID Display Week 2016
»OLED Microdisplays: Enabling Advanced Near-to-Eye Displays, Sensors, and Beyond«
Dr. Uwe Vogel, Session 52: OLED Displays II (Paper Number 52.2)
May 26, 2016, San Francisco Moscone Convention Center, Room 131

Exhibitor Forum
»Electron Beam Induced High-Resolution Modification of OLED Emission«
Elisabeth Bodenstein

»Electron Beam Induced High-Resolution Modification of OLED Emission«
Elisabeth Bodenstein, Poster number 208
May 26, 2016, San Francisco Moscone Convention Center, Room City View (Metreon)

Fraunhofer FEP is pleased to be host of next SID ME 2017 Chapter Spring Meeting on March 13 – 14, 2017 in Dresden. First Call-for-Papers here:

Press contact:

Annett Arnold
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP| Phone +49 351 2586 452 |
Winterbergstraße 28 | 01277 Dresden | Germany |

Weitere Informationen:

Annett Arnold | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP

All articles from Information Technology >>>

The most recent press releases about innovation >>>

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

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

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...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

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...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Resolving the mystery of preeclampsia

21.10.2016 | Health and Medicine

Stanford researchers create new special-purpose computer that may someday save us billions

21.10.2016 | Information Technology

From ancient fossils to future cars

21.10.2016 | Materials Sciences

More VideoLinks >>>