COMPOUND MEMBRANE, METHOD OF MANUFACTURING THE SAME, AND ACOUSTIC DEVICE
First Claim
Patent Images
1. A compound membrane for an acoustic device, the compound membrane comprising:
- a first layer;
a second layers connected to the first layer;
wherein a value of Young'"'"'s modulus of the second layer does not vary more than 30% in a temperature range between 20°
C. and +85°
C.
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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.
23 Citations
12 Claims
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1. A compound membrane for an acoustic device, the compound membrane comprising:
-
a first layer; a second layers connected to the first layer; wherein a value of Young'"'"'s modulus of the second layer does not vary more than 30% in a temperature range between 20°
C. and +85°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of manufacturing a compound membrane for an acoustic device, the method comprising:
forming a second layer on a first layer, wherein a value of Young'"'"'s modulus of the second layer does not vary more than 30% in a temperature range between 20°
C. and +85°
C., wherein the value of Young'"'"'s modulus of the second layer does not vary more than 30% in a temperature range between −
40°
C. and +85°
C. wherein the second layer comprises or consists of a thermoplastic material, wherein the thermoplastic material of the second layer has a glass transition temperature in a temperature range between −
60°
C. and −
10°
C.
Specification