Microphone with Irregular Diaphragm
First Claim
Patent Images
1. A method of forming a MEMS device, the method comprising:
- providing a backplate having a hole;
depositing a filler material within the hole to form an uneven top surface;
forming a diaphragm on the uneven top surface so that the diaphragm has a protruding portion on a bottom surface, the diaphragm being formed to be coupled with the backplate; and
forming a space between the diaphragm and the backplate, the diaphragm bottom surface facing the backplate, the protruding portion being substantially aligned with the hole in the backplate.
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Abstract
A microphone is formed to have a diaphragm that is configured to improve signal to noise ratio. To that end, the microphone has a backplate having a hole therethrough, and a diaphragm movably coupled with the backplate. The diaphragm has a bottom surface (facing the backplate) with a convex portion aligned with the hole in the backplate.
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Citations
7 Claims
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1. A method of forming a MEMS device, the method comprising:
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providing a backplate having a hole; depositing a filler material within the hole to form an uneven top surface; forming a diaphragm on the uneven top surface so that the diaphragm has a protruding portion on a bottom surface, the diaphragm being formed to be coupled with the backplate; and forming a space between the diaphragm and the backplate, the diaphragm bottom surface facing the backplate, the protruding portion being substantially aligned with the hole in the backplate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification