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Ultimate flexible barrier film
Monday, 28 December 2009 00:00
The 2009 annual report of $15 billion Japanese giant DNP, formerly Dai Nippon Printing, announces the success in the ongoing development of ultra-impermeable plastic film substrates.
There are high expectations that organic devices like printed, flexible OLED displays and printed, flexible organic photovoltaics will be very important next generation of electronic components. As the report points out, because organic devices are vulnerable to moisture, they have generally been manufactured on substrates of inorganic materials with low permeability to water vapor, such as glass. However because glass is heavier and less flexible than film substrates, developers have been seeking a film substrate with strong barrier properties that can accommodate the trend toward lighter, more flexible electronic devices.
DNP claims that it has solved this problem by succeeding in the development of an ultra-impermeable plastic film substrate with a water vapor transmission rate of only 10-7 g/m2/day. This is a magnitude below what most developers can measure let alone achieve.
DNP has succeeded in forming a high-precision, flat, smooth barrier layer largely by improving the cleanliness of their manufacturing processes and precisely controlling vacuum processing. DNP will now work on mass production technology for the barrier film, with an eye toward reaping 800 million yen in sales in the year through March 2014.
 

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