Surface mountable transducer system
First Claim
Patent Images
1. A silicon condenser microphone, comprising:
- a transducer element including a diaphragm;
a substrate including a surface having a recess formed therein, said transducer element overlapping at least a portion of said recess to form a volume adjacent to said transducer element, said transducer element including a cavity through which ambient sound pressure enters before deflecting said diaphragm;
a cover disposed over said cavity of said transducer element, said cover including a conductive portion forming a shield against electromagnetic interference, said cover having a length that is longer than a length of said diaphragm; and
at least one aperture formed in said cover.
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Abstract
The present invention relates to a surface mountable acoustic transducer system, comprising one or more transducers, a processing circuit electrically connected to the one or more transducers, and contact points arranged on an exterior surface part of the transducer system. The contact points are adapted to establish electrical connections between the transducer system and an external substrate, the contact points further being adapted to facilitate mounting of the transducer system on the external substrate by conventional surface mounting techniques.
75 Citations
42 Claims
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1. A silicon condenser microphone, comprising:
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a transducer element including a diaphragm; a substrate including a surface having a recess formed therein, said transducer element overlapping at least a portion of said recess to form a volume adjacent to said transducer element, said transducer element including a cavity through which ambient sound pressure enters before deflecting said diaphragm; a cover disposed over said cavity of said transducer element, said cover including a conductive portion forming a shield against electromagnetic interference, said cover having a length that is longer than a length of said diaphragm; and at least one aperture formed in said cover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A silicon condenser microphone, comprising:
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a transducer element including a diaphragm; a substrate including a surface having a recess formed therein, said transducer element overlapping at least a portion of said recess to form a volume adjacent to said transducer element, said transducer element including a cavity through which ambient sound pressure enters before deflecting said diaphragm; a multi-layer structure adjacent at least part of said transducer element, said multi-layer structure including a conductive layer and an insulating layer; and a cover disposed over said cavity and having a length that is longer than a length of said diaphragm. - View Dependent Claims (26, 27, 28, 29, 30, 39, 40)
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31. A method of fabricating a silicon condenser microphone, comprising:
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etching a recess into a substrate; flip-chip mounting a silicon-based transducer element onto said substrate such that said transducer element overlaps at least a portion of said recess to form a volume adjacent to said transducer element, said transducer element including a diaphragm and a cavity through which ambient sound pressure enters before deflecting said diaphragm; flip-chip mounting a silicon-based integrated circuit onto said substrate and adjacent to said transducer element; attaching a cover over said cavity, said cover having a length that is longer than a length of said diaphragm; and forming at least one aperture in said cover. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. A method of fabricating a silicon condenser microphone, comprising:
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etching a recess into a substrate; flip-chip mounting a silicon-based transducer element onto said substrate such that said transducer element overlaps at least a portion of said recess to form a volume adjacent to said transducer element, said transducer element including a diaphragm and a cavity through which ambient sound pressure enters before deflecting said diaphragm; attaching a cover over said cavity; forming said cover by injection molding; and forming at least one aperture in said cover, said cover having a length that is longer than a length of said diaphragm.
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41. A silicon condenser microphone, comprising:
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a transducer element having a diaphragm; a substrate including a surface having a recess formed therein, said transducer element overlapping at least a portion of said recess to form a volume adjacent to said transducer element, said volume being a back volume adjacent to a surface of said diaphragm, said transducer element further defining a front volume adjacent to an opposite surface of said diaphragm through which ambient sound pressure enters before deflecting said diaphragm; a multi-layer structure adjacent at least part of said transducer element, said multi-layer structure including a conductive layer and an insulating layer; and a cover completely covering said front volume. - View Dependent Claims (42)
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Specification