Pressure transmitter assembly

Details Pressure transmitter assembly Pressure transmitter assembly

G - Physics

01

L

73/10

G01L 9/06 (2006.01) G01L 9/00 (2006.01) G01L 13/02 (2006.01)

Patent

CA 1324498

APPLICATION OF G. E. HERSHEY, C. B. LANE, III AND D. W. WILDA PRESSURE TRANSMITTER ASSEMBLY ABSTRACT A pressure transmitter assembly includes a laminated ceramic structure for providing fluid passages as well as a support for a pressure sensor, electronic circuitry, fluid barrier diaphragms and input process fluid connections. The laminated structure is comprised of a plurality of co-fired ceramic layers having the fluid passages molded therein to enable fill fluids within the assembly to apply input pressures as a differential pressure across the pressure sensor. In one embodiment of the invention, three ceramic layers are used while a second embodiment uses four layers with an overload diaphragm captured between two of the layers. The laminated ceramic structure can be extended in either embodiment to include an outer ceramic circuit board which is bonded with a fluid-tight interface with an adjacent one of the other ceramic layers. Electronic components are mounted on the circuit board either before or after bonding, which also provides a capability for further fluid passages extending between the circuit board and an adjacent ceramic layer.

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