Printed dose-recording tag based on organic complementary circuits and ferroelectric nonvolatile memories.

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

An integrated organic circuit array for flexible large-area temperature sensing

An integrated organic temperature-sensing circuit array compatible with flexible and large-area substrates is presented. The array outputs an average value of 6.8 mV/A[over-carat][degree symbol]C, which is 22A[over-tilde] more responsive than the MOSFET implementation while dissipating 90 nW/cell. Highly linear outputs enable two-point calibrations that remove the effects of cell-to-cell variation.Semiconductor Research Corporation. Focus Center Research Program for Center for Circuits and Systems Solutions (C2S2) (contract 2003-CT-888)Natural Sciences and Engineering Research Council of Canada (NSERC)Hewlett-Packard Compan