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

Scientists create antilaser for ultracold atoms condensate August 16th, 2018

Research brief: UMN researchers use green gold to rapidly detect and identify harmful bacteria August 15th, 2018

Particles pull last drops of oil from well water: Rice University engineers find nanoscale solution to 'produced water' problem August 15th, 2018

CTI Materials drives nano commercialization with it's patented surfactant free nanoparticle dispersions August 15th, 2018

Display technology/LEDs/SS Lighting/OLEDs

Future electronic components to be printed like newspapers July 20th, 2018

DNA drives design principles for lighter, thinner optical displays: Lighter gold nanoparticles could replace thicker, heavier layered polymers used in displays’ back-reflectors June 27th, 2018

Nanomaterials could mean more algae outbreaks for wetlands, waterways: High tech metal particles may inadvertently take a toll on aquatic life June 26th, 2018

Making quantum puddles: Physicists discover how to create the thinnest liquid films ever June 13th, 2018

Chip Technology

Scientists create antilaser for ultracold atoms condensate August 16th, 2018

Flipping the switch on supramolecular electronics August 14th, 2018

Breaking down the Wiedemann-Franz law: In a study exploring the coupling between heat and particle currents in a gas of strongly interacting atoms, physicists at ETH Zurich find puzzling behaviours August 10th, 2018

Scientists squeeze nanocrystals in a liquid droplet into a solid-like state and back again: Simple chemical technique transforms crystal mixture where 2 liquids meet August 9th, 2018

Nanoelectronics

Flipping the switch on supramolecular electronics August 14th, 2018

Quantum chains in graphene nanoribbons: Breakthrough in nanoresearch August 9th, 2018

Nanotube 'rebar' makes graphene twice as tough: Rice University scientists test material that shows promise for flexible electronics August 3rd, 2018

Leti & CMP Announce World’s First Multi-Project-Wafer Service with Integrated Silicon OxRAM: Oxide-Based Resistive Ram Memory Platform Development for Backend Memories To Offer Non-Volatility Associated with Embedded Designs August 2nd, 2018

Announcements

Scientists create antilaser for ultracold atoms condensate August 16th, 2018

Research brief: UMN researchers use green gold to rapidly detect and identify harmful bacteria August 15th, 2018

Particles pull last drops of oil from well water: Rice University engineers find nanoscale solution to 'produced water' problem August 15th, 2018

How hot is Schrödinger's coffee? August 15th, 2018

Events/Classes

Kavli Lectures: New vision of nanomaterial synthesis and light-fueled space travel August 8th, 2018

Nanoscience and the future of healthcare kick off first day of ACS national meeting in Boston: Presidential events highlight safety, diversity and groundbreaking research August 2nd, 2018

Leti & CMP Announce World’s First Multi-Project-Wafer Service with Integrated Silicon OxRAM: Oxide-Based Resistive Ram Memory Platform Development for Backend Memories To Offer Non-Volatility Associated with Embedded Designs August 2nd, 2018

Strategic Materials Conference 2018 Highlights “Materials Shaping the Future of Electronics” July 30th, 2018

Printing/Lithography/Inkjet/Inks/Bio-printing

CTI Materials drives nano commercialization with it's patented surfactant free nanoparticle dispersions August 15th, 2018

Future electronic components to be printed like newspapers July 20th, 2018

Making carbon nanotubes as usable as common plastics: Researchers discover that cresols disperse carbon nanotubes at unprecedentedly high concentrations May 15th, 2018

New 4-D printer could reshape the world we live in March 20th, 2018

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project