Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button


DHgate

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

Display technology/LEDs/SS Lighting/OLEDs

Graphene leans on glass to advance electronics: Scientists' use of common glass to optimize graphene's electronic properties could improve technologies from flat screens to solar cells February 12th, 2016

A metal that behaves like water: Researchers describe new behaviors of graphene February 12th, 2016

News and information

'Lasers rewired': Scientists find a new way to make nanowire lasers: Berkeley Lab, UC Berkeley scientists adapt next-gen solar cell materials for a different purpose February 12th, 2016

Breaking cell barriers with retractable protein nanoneedles: Adapting a bacterial structure, Wyss Institute researchers develop protein actuators that can mechanically puncture cells February 12th, 2016

Replacement of Toxic Antibacterial Agents Possible by Biocompatible Polymeric Nanocomposites February 12th, 2016

Properties of Polymeric Nanofibers Optimized to Treat Damaged Body Tissues February 12th, 2016

Chip Technology

A metal that behaves like water: Researchers describe new behaviors of graphene February 12th, 2016

Silicon chip with integrated laser: Light from a nanowire: Nanolaser for information technology February 12th, 2016

Research reveals carbon films can give microchips energy storage capability: International team from Drexel University and Paul Sabatier University reveals versatility of carbon films February 11th, 2016

New thin film transistor may lead to flexible devices: Researchers engineer an electronics first, opening door to flexible electronics February 10th, 2016

Nanoelectronics

Silicon chip with integrated laser: Light from a nanowire: Nanolaser for information technology February 12th, 2016

Electron's 1-D metallic surface state observed: A step for the prediction of electronic properties of extremely-fine metal nanowires in next-generation semiconductors February 9th, 2016

The iron stepping stones to better wearable tech without semiconductors February 8th, 2016

Spin dynamics in an atomically thin semi-conductor February 1st, 2016

Announcements

Graphene leans on glass to advance electronics: Scientists' use of common glass to optimize graphene's electronic properties could improve technologies from flat screens to solar cells February 12th, 2016

Breaking cell barriers with retractable protein nanoneedles: Adapting a bacterial structure, Wyss Institute researchers develop protein actuators that can mechanically puncture cells February 12th, 2016

Replacement of Toxic Antibacterial Agents Possible by Biocompatible Polymeric Nanocomposites February 12th, 2016

Properties of Polymeric Nanofibers Optimized to Treat Damaged Body Tissues February 12th, 2016

Events/Classes

Cima NanoTech Debuts Large Interactive Touch Screens with European Customers at ISE 2016: For the first time in Europe, Cima NanoTech’s wide range of high performance, projected capacitive touch modules are showcased February 11th, 2016

Nanotech Security to Present at the Optical Document Security Conference February 11, 2016 February 4th, 2016

New research uses nanotechnology to prevent preterm birth: March of Dimes honors abstract on prematurity at SMFM Annual Meeting February 2nd, 2016

NBC LEARN DEBUTS SIX-PART VIDEO SERIES, “NANOTECHNOLOGY: SUPER SMALL SCIENCE” Produced by NBC Learn in partnership with the National Science Foundation, and narrated by NBC News/MSNBC’s Kate Snow, series highlights leading research in nanotechnology January 25th, 2016

Printing/Lithography/Inkjet/Inks

Creating a color printer that uses a colorless, non-toxic ink inspired by nature February 11th, 2016

Teijin to Participate in Nano Tech 2016 January 21st, 2016

New bimetallic alloy nanoparticles for printed electronic circuits: Production of oxidation-resistant copper alloy nanoparticles by electrical explosion of wire for printed electronics January 5th, 2016

Photonic “sintering” may create new solar, electronics manufacturing technologies December 1st, 2015

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