Innovations in Polyester Film substrates for the Flexible Electronics Industry

Innovations in Polyester Film substrates for the Flexible Electronics Industry

Asima Chakravorty
DuPont Teijin Films

Continuous innovations in the Flexible Electronics market have motivated material suppliers to brainstorm new ideas for adding improved functionalities to base materials used as substrates in the flexible electronic devices. The use of polyester films as substrates for flexible electronics and OLED displays has been well known for some time. New applications such as electrophoretic displays, TFT backplanes, barrier films and photovoltaics need flexible substrates with added features. The next generation of flexible electronics may require a different set of material specifications to enable flexible hybrid systems, foldable displays, and wearable devices. While dimensional reproducibility is a key requirement for the base materials used in these applications, surface smoothness, optical clarity, minimal to zero shrinkage coupled with excellent chemical resistance and high barrier properties are the fundamental needs for any of these applications. New developments also call for UV and hydrolytic stability and VTM-0 flame retardance for these base films. The understanding of the property set required for films in use in flexible electronics applications has moved considerably over the past decades and significant progress has been made in developing films appropriate for use. The presentation will touch upon the advantages of using biaxially oriented polyester films as substrates for flexible electronic applications and review recent developments in DTF catering to the flexible electronics and PV industry. New advances in the area of Ultra-barrier films for Displays, Photovoltaic front and back sheet, In-Mold Electronics and Flame retardant films will be discussed.