Abstract
Herein, the reliability and potential of inkjet‐printed flexible heaters are demonstrated by a set of resilience tests, showing never before performed high‐temperature application. The flexible heaters can operate up to 400 °C and failures are not caused by the printed conductor, but due to the temperature sensitivity of the base substrate only. Furthermore, these heaters show an accurate repetition rate with fluctuations <3% (2 °C within ten up–down cycles between 20 and 150 °C) and great long‐lasting capability (200 h on‐time operation at 150–180 °C). The bending strength has been proven by 10 000 cycles with resistance change less than 5%. Additionally, the adaptability and adjustability of defined temperature zones with the help of design rules for the layout definition are illustrated. These inkjet‐printed heaters demonstrate a high potential of usage in high‐temperature and flexible applications with the prerequisite of high stability and reliability.
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