Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button

Home > Press > Moisture Barriers for Flexible Electronics

Abstract:
By Dr Harry Zervos, Technical Analyst, IDTechEx

Defects on plastic substrates such as pinholes, cracks and grain boundaries cause a 'pore effect', where oxygen and water molecules are able to seep through and penetrate through the plastic barrier and into the active material. For applications such as flexible OLED displays, organic solar cells, or even electrophoretic displays, sensitivity to oxygen and moisture compromises device lifetime significantly. This means that in order to achieve adequate lifetime for flexible devices that would make viable commercial products, the pathway for oxygen and moisture down into the active layers must be blocked.

Moisture Barriers for Flexible Electronics

Cambridge, UK | Posted on March 22nd, 2011

Terra-Barrier

Tera-Barrier Films is a portfolio company of Exploit Technologies Pte. Ltd. (ETPL), the commercialisation arm of Singapore's Agency for Science, Technology and Research (A*STAR) and Applied Ventures, LLC, the venture capital arm of Applied Materials, Inc. as of August 2009. The company was incubated by Exploit-Technologies Pte. Ltd. as a Flagship programme for two years prior to spin-off.

Current barrier technologies focus on reducing these defects by using alternate organic and inorganic multilayers coated on plastic. In contrast, Tera-Barrier has taken an innovative approach to resolve the 'pore effect' by literally plugging the defects in the barrier oxide films using nanoparticles. This reduces the number of barrier layers needed in the construction of the barrier film down to two layers in this unique nanoengineered barrier stack. Tera-Barrier's barrier stack consists of barrier oxide layers and nanoparticulate sealing layers. The nanoparticles used in the barrier film have a dual function - not only sealing the defect but also actively reacting with and retaining the moisture and oxygen.

Source: Terra-Barrrier

The result is a moisture barrier performance of better than 10-6 g/m2.day which satisfies even the most stringent requirements for flexible organic device substrates. The barrier film also has a lag time of more than 2,300 hours at 60 ⁰C and 90% RH (i.e. the time required for moisture to pass through the barrier film under those conditions).

Adhesives: Henkel, DELO

It's also important to point out that the barrier layer on its own is not an adequate way to keep oxygen and moisture away from the active materials. Moisture ingress can also occur from the side of the device if it is not adequately sealed. This leads to specific requirements in water vapour transmission rates for the sealants used in electronic devices.

Two of the main companies developing these types of adhesives are Henkel and DELO, Henkel focused mainly on thermally-cured solutions while DELO is focused on UV-cured adhesives.
A trade-off becomes apparent when trying to find the right balance of permeation rates and flexibility. The adhesives that are characterised by the best performance in terms of water vapour transmission are more rigid and would compromise the overall flexibility of the final device. This means that in order to manufacture devices of a given flexibility, permeation performance needs to be sacrificed. Hence, a lot of research and development effort is focused into the development of systems that would lead to a good balance between permeation performance and flexibility.

For more in-depth presentations from Henkel, DELO and Terra Barrier as well as breakthroughs in other materials, manufacturing and novel devices, don't miss the opportunity to attend Printed Electronics/Photovoltaics Europe, in Dusseldorf, Germany on the 5th and 6th of April 2011.

####

For more information, please click here

Contacts:
Cara Harrington

Copyright © IDTechEx

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Ultrasensitive sensor using N-doped graphene July 26th, 2016

The NanoWizard® AFM from JPK is applied for interdisciplinary research at the University of South Australia for applications including smart wound healing and how plants can protect themselves from toxins July 26th, 2016

Accurate design of large icosahedral protein nanocages pushes bioengineering boundaries: Scientists used computational methods to build ten large, two-component, co-assembling icosahedral protein complexes the size of small virus coats July 25th, 2016

XEI Scientific Partners with Electron Microscopy Sciences to Promote and Sell its Products in North and South America July 25th, 2016

Display technology/LEDs/SS Lighting/OLEDs

Researchers develop faster, precise silica coating process for quantum dot nanorods July 12th, 2016

Integrated trio of 2-D nanomaterials unlocks graphene electronics applications: Voltage-controlled oscillator developed at UC Riverside could be used in thousands of applications from computers to wearable technologies July 7th, 2016

GraphExeter illuminates bright new future for flexible lighting devices June 23rd, 2016

New nanomaterial offers promise in bendable, wearable electronic devices: Electroplated polymer makes transparent, highly conductive, ultrathin film June 13th, 2016

Chip Technology

Ultra-flat circuits will have unique properties: Rice University lab studies 2-D hybrids to see how they differ from common electronics July 25th, 2016

Attosecond physics: Mapping electromagnetic waveforms July 25th, 2016

Borrowing from pastry chefs, engineers create nanolayered composites: Method to stack hundreds of nanoscale layers could open new vistas in materials science July 25th, 2016

Integration of novel materials with silicon chips makes new 'smart' devices possible July 25th, 2016

Nanoelectronics

Ultra-flat circuits will have unique properties: Rice University lab studies 2-D hybrids to see how they differ from common electronics July 25th, 2016

Borrowing from pastry chefs, engineers create nanolayered composites: Method to stack hundreds of nanoscale layers could open new vistas in materials science July 25th, 2016

Making magnets flip like cats at room temperature: Heusler alloy NiMnSb could prove valuable as a new material for digital information processing and storage July 25th, 2016

Quantum drag:University of Iowa physicist says current in one iron magnetic sheet can create quantized spin waves in another, separate sheet July 22nd, 2016

Announcements

Ultrasensitive sensor using N-doped graphene July 26th, 2016

The NanoWizard® AFM from JPK is applied for interdisciplinary research at the University of South Australia for applications including smart wound healing and how plants can protect themselves from toxins July 26th, 2016

Designing climate-friendly concrete, from the nanoscale up: New understanding of concrete’s properties could increase lifetime of the building material, decrease emissions July 25th, 2016

XEI Scientific Partners with Electron Microscopy Sciences to Promote and Sell its Products in North and South America July 25th, 2016

Events/Classes

Nanometrics Announces Upcoming Investor Events July 20th, 2016

n-tech Research Announces August 3, 2016 Date for Smart Coatings Webinar July 18th, 2016

Instrumented Indentation Expert Addresses Trends with Industry Leaders: Leading nanoindentation expert hosts webinar discussing theory and practice of instrumented indentation July 14th, 2016

SUNY Poly Celebrates Its 10th Year Exhibiting at SEMICON West with Cutting Edge Developments in Integrated Photonics and Power Electronics July 8th, 2016

Printing/Lithography/Inkjet/Inks

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Perovskite solar cells surpass 20 percent efficiency: EPFL researchers are pushing the limits of perovskite solar cell performance by exploring the best way to grow these crystals June 13th, 2016

'On-the-fly' 3-D print system prints what you design, as you design it June 1st, 2016

Physicists create first metamaterial with rewritable magnetic ordering May 23rd, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic