Strain gage transducer and process for fabricating same

Details Strain gage transducer and process for fabricating same Strain gage transducer and process for fabricating same

1979-09-04

1981-09-08

Ciarlante, Anthony V.

Measuring and testing

Fluid pressure gauge

Diaphragm

73726, 338 4, G01L 904

Patent

active

042877725

ABSTRACT:
A transducer which includes a metal strain gage material formed on a flexible monocrystalline silicon diaphragm is disclosed. The transducer is fabricated to a large extent with semiconductor processing steps. Gold is diffused into a platinum-tungsten gage material. This allows the gage material to be chemically etched in the presence of other metals to define the active gage resistors. In the presently preferred embodiment, these resistors are formed over thin areas of the diaphragm to provide increased linearity and sensitivity.

REFERENCES:
patent: 3341794 (1967-09-01), Stedman
patent: 3513430 (1970-05-01), Heller
patent: 3913391 (1975-10-01), Kurtz
patent: 3922705 (1975-11-01), Yerman

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