PRESSURE PHOTO SENSOR UTILIZING POLYMER MAGNETIC COMPOSITE

A polymer magnetic composite (PMC) is a flexible thick film and is com posed of a ferrite powder with variable possible Curie temperatures, p olymer and solvent. We found that high and low Curie temperature PMCs can be used for pressure and photo sensors, respectively. The set up c ombined with the PMC and a pressure element acts as a pressure sensor. The device painted with a radiant flux absorbent on the surface of th e PMC will respond to the visible rays. The pressure and light signals are read out by a Hall element in non-contact with the PMC.