Patent · US Active

Capacitive microphone with insulated conductive plate

US9503823B2 · kind B2 · utility

1Cited by

1References

9Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Stefan Barzen · Munich, DE
Andre Brockmeier · Villach, AT
Marc Fueldner · Neubiberg, DE
Stephan Pindl · Ergoldsbach, DE
Wolfgang Friza · Villach, AT

Key dates

Filing date	Dec 24, 2014
Grant date	Nov 22, 2016
Priority date	—
Expiry date	Dec 24, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04R19/016
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A capacitive microphone may include a housing, a membrane, and a first backplate, wherein a first insulating layer may be disposed on a first side of the first backplate facing the membrane and a second insulating layer may be disposed on a second side of the first backplate opposite to the first side of the first backplate. A further insulating layer may be disposed on a side wall of at least one of a plurality of perforation holes in the first backplate. Each conductive surface of the first backplate may be covered with insulating material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.