Disposable transducer apparatus for an electromanometry system
Number of patents in Portfolio can not be more than 2000
United States of America
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-
Oct 2, 1990
Grant Date -
N/A
app pub date -
Dec 10, 1987
filing date -
Jun 22, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The disposable transducer includes a small housing constructed of lightweight plastic material. The housing is shaped so as to form a transparent chamber within which is situated a very small piezoresistive strain gauge in the form of a resistive bridge network diffused onto a semiconductor substrate. The semiconductor substrate is electrically isolated by means of a nonconductive gel which partially fills the transparent chamber in which the semiconductor substrate is positioned. The resistive bridge network of the semiconductor substrate is also electrically connected to a plurality of calibration resistors which are separately formed on the semiconductor substrate, making the entire apparatus economically disposable after a single use.
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