Patent ID: 6117292
Filing Date: 2000-09-12
Classification: G01N

Abstract:
An ion-sensitive probe comprising:a. a housing having a central bore and a first end open to the central bore, a back hole and a media hole in the housing in fluid communication with the central bore, and a cavity communicating with the media hole;b. an elastomeric media seal, having a through-hole therein in fluid communication with the media hole and sized to fit within the cavity for hermetically sealing the fluid passage through the media hole to the central bore except by way of the through-hole;c. an ion-sensitive semiconductor within the cavity having a first side with a sensing area and a second opposing side with patterned electrical leads in electrical communication with the sensing area, the sensing area in fluid communication within the media seal through-hole;d. a PCB, with electrical leads on first and second surfaces thereof, extending through the first housing opening and the central bore, at least some of the PCB electrical leads on the first surface of the PCB contacting the ion sensitive semiconductor; ande. an electrically conductive plug constructed to be inserted into the back hole and arranged to have at least some of the PCB electrical leads on the second surface of the PCB contacting the plug, whereby the plug is mechanically engaged in the back hole so as to press the media seal into a hermetically-sealed position against the housing.