Citation
Ng, T.; Schwartz, D. E.; Mei, P.; Krusor, B. S.; Kor, S.; Veres, J.; Broms, P.; Eriksson, T.; Wang, Y.; Hagel, O.; Karlsson, C. Printed dose-recording tag based on organic complementary circuits and ferroelectric nonvolatile memories. Scientific Reports, 5, 13457 (2015).
Abstract
We have demonstrated a printed electronic tag that monitors time-integrated sensor signals and writes to nonvolatile memories for later readout. The tag is additively fabricated on flexible plastic foil and comprises a thermistor divider, complementary organic circuits, and two nonvolatile memory cells. With a supply voltage below 30 V, the threshold temperatures can be tuned between 0 C and 80 C. The time-temperature dose measurement is calibrated for minute-scale integration. The two memory bits are sequentially written in a thermometer code to provide an accumulated dose record.
