Processing

Please wait...

Settings

Settings

1. WO2000039570 - SENSOR FOR DETECTING SMALL CONCENTRATIONS OF A TARGET MATTER

Publication Number WO/2000/039570
Publication Date 06.07.2000
International Application No. PCT/US1999/030540
International Filing Date 21.12.1999
Chapter 2 Demand Filed 14.07.2000
IPC
G01N 27/04 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
02by investigating impedance
04by investigating resistance
CPC
G01N 27/041
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
02by investigating the impedance of the material
04by investigating resistance
041of a solid body
Applicants
  • RAYTHEON COMPANY [US/US]; 141 Spring Street Lexington, MA 02421, US
Inventors
  • CHANDRA, Dipankar; US
  • SYLLAIOS, Athanasios, J.; US
Agents
  • MILLS, Jerry, W.; Baker & Botts, L.L.P. 2001 Ross Avenue Dallas, TX 75201-2980, US
Priority Data
09/221,39128.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SENSOR FOR DETECTING SMALL CONCENTRATIONS OF A TARGET MATTER
(FR) CAPTEUR DE DETECTION DE PETITES CONCENTRATIONS D'UNE SUBSTANCE CIBLE
Abstract
(EN)
A gas sensor is constructed to detect and measure concentrations of a target matter in either a microenvironment or in normal applications. A piezoresistive layer is mechanically coupled to a chemical sensitive layer. The reaction of the target matter with the chemical sensitive layer creates an induced strain in the chemical sensitive layer. This induced strain in the chemical sensitive layer in turn causes stress to be applied to the piezoresistive material. The applied stress results in a change in resistance of the piezoresistive material. This change in resistance is a measure of the concentration of the target matter that is interacting with the chemical sensitive layer.
(FR)
L'invention concerne un capteur de gaz élaboré pour détecter et mesurer des concentrations d'une substance cible soit dans un micromilieu, soit dans des applications normales. Une couche piézorésistive est couplée mécaniquement à une couche chimique sensible. La réaction de la substance cible avec la couche chimique sensible crée une tension induite dans ladite couche chimique sensible. Cette tension induite dans la couche chimique sensible provoque à son tour une contrainte destinée à être appliquée au matériau piézorésistif. La contrainte appliquée résulte en un changement de résistance du matériau piézorésistif. Ce changement de résistance constitue une mesure de concentration de la substance cible qui interagit avec la couche chimique sensible.
Also published as
Latest bibliographic data on file with the International Bureau