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  5. Foldable Touch

Foldable Touch

Next-generation bendable tablets and smartphones have captured our imagination for years. And now its burgeoning into reality. Transparent touch sensor electrodes made from Clevios® PEDOT conductive polymers help the next generation of touch displays to become flexible, foldable, wearable, curved, 3D-formable, thereby combining the best of potential technologies.

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Wanted: flexibility and durability

Foldable and rollable touch displays will require all components to be mechanically fully flexible, durable, and robust to guarantee a long product lifetime. For example, materials need to withstand folding tests with more than 300,000 bendings at a radius of 1mm, for which conventional materials such as ITO are not suitable.

 

An outstanding solution

Heraeus has developed a new key material, Clevios® HY E, for foldable touch sensors. Even after over 300,000 bendings at an extreme radius of only 1mm, the materials electrical properties are stable owing to the outstanding and intrinsically flexible properties of the conductive polymer PEDOT:PSS. Sheet resistances can reach as low as 40 Ohm/sq.

 

Successful AMOLED touch display prototype

Together with ITRI in Taiwan, we were able to demonstrate a successful use-case for Clevios® PEDOT:PSS. A flexible AMOLED touch display prototype was built, using a foldable Clevios® touch sensor on a 12µm polyimide substrate. Read the whole story.

Clevios® HY E is a hybrid material of silver nanowires (AgNW) and PEDOT:PSS, combining the best properties of both technologies.

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