Microphone Membrane And Microphone Comprising The Same
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United States of America Patent
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Issued Date -
May 21, 2009
app pub date -
Feb 8, 2006
filing date -
Feb 24, 2005
priority date (Note) -
Abandoned
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Abstract
The invention relates to a microphone membrane (M1) comprising two piezoelectric layers (PS1, PS2) with c-axes oriented in the same direction. A first electroconductive surface (E11) is formed in the central metal layer and subjected to a first electrical potential. The piezoelectric layers (PS1, PS2) are respectively arranged between the central metal layer (ML2) and an outer metal layer (ML1, ML3). In a preferred embodiment, the membrane (M1) has a largely symmetrical structure in terms of the layer sequence and the layer thickness thereof.
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