Patent · US Active

Compound membrane, method of manufacturing the same, and acoustic device

US8284964B2 · kind B2 · utility

10Cited by

3References

12Claims

0Family size

Assignee

Knowles Electronics Asia PTE. Ltd. · SG

Inventors

Susanne Windischberger · Wien, AT
Josef Lutz · Rohrau, AT
Ewald Frasl · Biedermannsdorf, AT

Key dates

Filing date	Oct 16, 2007
Grant date	Oct 9, 2012
Priority date	—
Expiry date	Mar 22, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49575
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A compound membrane (100) for an acoustic device (200), the compound membrane (100) comprising a first layer (101) and a second layer (102), wherein a value of Young's modulus of the second layer (102) does not vary more than essentially 30% in a temperature range between essentially −20° C. and essentially +85° C.

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