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Heraeus Shows Cell Phone from E-Chem at LOPEC

Highly conductive PEDOT used as an alternative to ITO touch technology in prototype mobile phone device

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By: DAVID SAVASTANO

Contributing Editor, Coatings World and Ink World, Coatings World and Ink World Magazine

The application of Clevios PEDOT:PSS in touch technology – providing, clear, conductive and flexible properties in touch devices – has resulted in the preparation of a cellphone pilot-product by E-Chem, Taiwan, along with its production partners EOC and Eternal.

Heraeus provides Clevios PH1000 highly conductive polymer to EOC, who prepares a formulation of the product. Eternal then applies the formulated material onto a PET film. The film is used in the device following a laser patterning process applied by E-Chem, who also distributes the technology. The preparation of the demonstrator cell phone provides a simple example of technical advancement.

The Clevios PEDOT:PSS range from Heraeus consists of materials for antistatic through to highly conductive applications. Materials are modified for their application method, usually printing or coating, and for their end application requirements. Typically Clevios coatings can reach 100 -250 ohm/sq. at a transparency of 90% (excluding substrate film). Clevios is increasingly finding applications in touch screens and sensors, as well as OLEDs, solar cells and security coatings.

The teamwork combines EOC’s formulation expertise with Eternals coating technology and E-Chem’s patterning knowledge, along with Heraeus’ advanced materials.

“The work with E-Chem and its partners in Taiwan is an enabling technology, generating exciting new business opportunities and options for the touch display industry,” said Dr. Stephan Kirchmeyer, business unit manager, Display and Semiconductor at Heraeus. “Using these formulating, coating and patterning options, cell phones can become more economic, of higher optical quality and even can be curved or flexible.”

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