Microphone and manufacturing method therefor
US10764693B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 25, 2018 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Jul 25, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/003
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present application teaches microphones and manufacturing methods therefor and relates to the field of semiconductor technologies. In some implementations, a method may include: providing a substrate structure, the substrate structure including a substrate and a first insulating layer covering a first part of the substrate; forming a first electrode plate layer, the first electrode plate layer covering a part of the first insulating layer; and forming a second insulating layer, the second insulating layer covering a part of a region of the first insulating layer which is not covered by the first electrode plate layer and a part of the first electrode plate layer, where when seen from the top, the first electrode plate layer and the second insulating layer form an angle, the angle exposes a second part of the substrate, and a degree θ of the angle is larger than or equal to 90° and is smaller than or equal to 180°. The present application can improve a problem of unexpected holes formed in the microphone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.