HIGH TEMPERATURE PRESSURE SENSITIVE DEVICES AND METHODS THEREOF

摘要

A pressure sensitive device that provides a stable response to measure an applied force at temperatures greater than 150° F. (about 66° C.) is disclosed. The pressure sensitive device can have a conductivity of about 0.01μS to about 1300μS and a sensitivity of about 0.01μS/lb to about 300μS/lb (about 0.02μS/kg to about 660μS/kg) at about a temperature range of about−50° F. to over about 400° F. or 420° F. (about−45° C. to over about 205° C. or 216° C.). The pressure sensitive device can have a substrate of polyimide, conductive leads of silver dispersed in a polyhydroxy ether crosslinked with melamine formaldehyde, and a pressure sensitive layer of carbon nanoparticles dispersed in cured polyamic acid forming a polyimide.