Sensor packaging having an integral electrode plug member

Details Sensor packaging having an integral electrode plug member Sensor packaging having an integral electrode plug member

G - Physics

01

N

G01N 27/414 (2006.01)

Patent

CA 2331733

A chemical sensor apparatus and method of making same is disclosed in which an ion sensitive silicon die (47) is sandwiched between an elastomeric media seal (49) and a conductive elastomeric pad (51) contained within a housing. The conductive elastomeric pad contacts a printed circuit board (PCB) (37) which leads from the housing. The die, elastomers and PCB are secured by a press-fit electrically conductive plug (53), which contacts and makes an electrical connection with the PCB. The plug functions as a counter electrode for the apparatus as well as a mechanical lock that seals the principal components of the apparatus within the housing in a substantially flush hermetic seal.

Cette invention a trait à un détecteur chimique ainsi qu'à son procédé de fabrication, procédé dans le cadre duquel une matrice au silicium (47) réagissant aux ions est prise en sandwich entre un joint élastomère de protection contre le milieu ambiant (49) et une plage de connexion (57) conductrice élastomère contenus dans un boîtier. La plage de connexion conductrice élastomère est au contact d'une plaquette de circuits imprimés (PCB) (37) pourvue de fils partant du boîtier. La matrice, les joints élastomères et la plaquette sont fixés au moyen d'une fiche conductrice (53) par ajustage à la presse, laquelle fiche est au contact de la plaquette et établit une connexion électrique avec celle-ci. Cette fiche, qui fait office de contre-électrode pour l'appareil, sert également de moyen de verrouillage mécanique scellant les principaux composants de l'appareil dans le boîtier en constituant un joint hermétique affleurant globalement.

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