High temperature pressure sensitive device and method thereof

Details High temperature pressure sensitive device and method thereof High temperature pressure sensitive device and method thereof

G - Physics

01

L

G01L 1/20 (2006.01)

Patent

CA 2525530

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 ~S to about 1300 ~S and a sensitivity of about 0.01 ~S/lb to about 300 ~S/lb (about 0.02 ~S/kg to about 660 ~S/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 polyarnic acid forming a polyimide.

La présente invention a trait à un dispositif sensible à la pression fournissant une réaction stable pour la mesure d'une force appliquée à des températures supérieures à 150 ·F (environ 66·C). Le dispositif sensible à la pression peut présenter une conductivité d'environ 0,01 µS à environ 1300 µS et une sensibilité d'environ 0,01 ?S/lb à environ 300 ?S/lb (environ 0,02 ?S/kg à environ 660 ?S/kg) à une plage de températures d'environ 50 ·F jusqu'à plus de 400 ·F ou 420 ·F environ (environ -45 ·C à plus de 205 ·C ou 216 ·C environ). Le dispositif sensible à la pression peut comprendre un substrat en polyimide, des fils conducteurs d'argent dispersés dans un éther polyhydroxyle réticulé avec de l'aldéhyde formique de mélamine, et une couche sensible à la pression de nanoparticules de carbone dispersées dans de l'acide polyamique traité formant un polyimide.

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