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 0.01 muS to about 1300 muS and a sensitivity of about 0.01 muS/lb to about 300 muS/lb (about 0.02 muS/kg to about 660 muS/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.