Miniature silicon condenser microphone

Details Miniature silicon condenser microphone Miniature silicon condenser microphone

1996-11-21

1998-04-14

Tran, Sinh

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Thermal response to, or generation of, sound vibration

381169, 381189, H04R 2500

Patent

active

057402612

ABSTRACT:
A housing for shielding a transducer of the type mounted on a silicon die attached to a flexible circuit. The housing provides a jacket which protects the silicon die from physical damage. The jacket, in cooperation with the top and bottom cups, further provides a shield for the silicon die from light and electromagnetic interferences. An acoustic port located on the top portion of the jacket furnishes the means by which acoustic energy enters the jacket to contact the transducer. A back cavity, formed between the bottom cup and the silicon die, serves as the acoustic pressure reference which allows the microphone to function properly.

REFERENCES:
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patent: 4793821 (1988-12-01), Muller et al.
patent: 5006749 (1991-04-01), White
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patent: 5178015 (1993-01-01), Loeppert et al.
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patent: 5490220 (1996-02-01), Loeppert
patent: 5635754 (1997-06-01), Strobel et al.

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