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US 4,229,979 AGranted
Transducer and method of making the same
AssigneeInternational Standard Electric Corporation
InventorJohn C. Greenwood
Life of this patent
Estimating the term…
Abstract
A silicon transducer including a silicon frame with one or more lands extending from a diaphragm or the like. The lands are interconnected by two thin strips formed integrally with the lands. The strips are essentially the transducer. The transducer is constructed by etching a boron doped wafer with a mixture of catechol, ethylene diamine and water.
Claims2
A pressure transducer comprising:
- a flexible diaphragm supported in a frame of the same material as the diaphragm;
- first and second lands extending from one surface of said diaphragm;
- a plurality of filaments stretched and fixed between said lands;
- and means to vibrate said filaments at their respective resonant frequencies as determined by the configuration of said diaphragm, movement of said diaphragm producing movements of said lands toward and away from each other, said movements respectively causing stresses, strains and therefore lengthwise contractions and elongations of said filaments and thereby respective lowering and raising of the tensions in and the resonant frequencies of said filaments.
1 more element
Dependencies are inferred from the claim text.