Disposable transducer apparatus for an electromanometry system
USRE33360E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1987 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Dec 10, 2007 |
Classification
- Technology area (CPC —)General
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.