March 28, 2017

Finnish flexible electronic devices on a roll

The roll-to-roll technique enables electronics to be printed on a plastic or elastomeric foil, which has various benefits such as thinness, lightness, elasticity and transparency.
The roll-to-roll technique enables electronics to be printed on a plastic or elastomeric foil, which has various benefits such as thinness, lightness, elasticity and transparency.
Antti Veijola

VTT Technical Research Centre of Finland has, for the first time, performed all of the manufacturing stages for a flexible in-moulded LED foil in a roll-to-roll process.

The demo thus proves the suitability of the technique for the highly cost-effective manufacture of small-sized, easy-to-use products, such as flexible LED displays containing printed electronics.

“For the wristband demo, we performed all of the key manufacturing stages for printed hybrid systems – the printing of conductors, the assembly of semiconductor LEDs and the overmolding – using the roll-to-roll technique,” says Sami Ihme, senior scientist.

The results were promising. In the first test run for the overmolding of 186 LEDs, a 100 per cent yield was achieved.

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