Acoustic transducers and method of microfabrication
First Claim
1. An acoustic transducer comprising a silicon substrate forming a first electrode, a membrane of selected shape supported at its edges spaced from said substrate by an integral support structure of the same material as the membrane, and a conductive film is carried by said membrane to form a second electrode of said acoustic transducer characterized in that the support structure includes reservoirs and tortuous channels communicating between the reservoirs and the space between the substrate and the membrane.
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Accused Products
Abstract
There is provided an acoustic transducer which includes a membrane of selected size and shape supported at its edges spaced from a first conductive electrode by an integral support structure with the second conductive electrode comprising a thin metal film on the membrane. The active membrane area is undisturbed by etch vias.
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Citations
9 Claims
- 1. An acoustic transducer comprising a silicon substrate forming a first electrode, a membrane of selected shape supported at its edges spaced from said substrate by an integral support structure of the same material as the membrane, and a conductive film is carried by said membrane to form a second electrode of said acoustic transducer characterized in that the support structure includes reservoirs and tortuous channels communicating between the reservoirs and the space between the substrate and the membrane.
Specification