US2022159387A1PendingUtilityA1

Electrostatic graphene speaker

71
Assignee: UNIV CALIFORNIAPriority: Dec 20, 2012Filed: Feb 1, 2022Published: May 19, 2022
Est. expiryDec 20, 2032(~6.4 yrs left)· nominal 20-yr term from priority
Inventors:Qin ZhouAlexander K. Zettl
H04R 19/02H04R 29/001H04R 23/002Y10S977/733H04R 19/005B82Y 15/00
71
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Claims

Abstract

This disclosure provides a device that includes a graphene membrane and a first electrode proximate a first side of the graphene membrane, the first electrode being electrically conductive. The device further includes a frame comprising a first part and a second part, wherein the graphene membrane is suspended between the first part and the second part. The device is configured to have a frequency response across a frequency range at least from 20 Hz to 20 kHz or across the entire human audible frequency range. The device is a microphone or a loudspeaker.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A device comprising:
 a graphene membrane;   a first electrode proximate a first side of the graphene membrane, the first electrode being electrically conductive; and   a frame comprising a first part and a second part;   wherein the graphene membrane is suspended between the first part and the second part,   wherein the device is configured to have a frequency response across a frequency range at least from 20 Hz to 20 kHz or across the entire human audible frequency range, and   wherein the device is a microphone or a loudspeaker.   
     
     
         2 . The device of  claim 1 , further comprising:
 a wire in electrical contact with the graphene membrane.   
     
     
         3 . The device of  claim 2 ,
 wherein the wire is a metallic wire.   
     
     
         4 . The device of  claim 1 ,
 wherein the graphene membrane includes about 1 to about 100 layers of graphene.   
     
     
         5 . The device of  claim 1 ,
 wherein the graphene membrane is about 20 nanometers to about 40 nanometers thick.   
     
     
         6 . The device of  claim 1 ,
 wherein the graphene membrane is a multilayer graphene membrane.   
     
     
         7 . The device of  claim 1 ,
 wherein the first electrode includes a silicon wafer.   
     
     
         8 . The device of  claim 1 ,
 wherein the frame comprises an open region, and wherein the graphene membrane is adhered to the frame with an adhesive.   
     
     
         9 . A device comprising:
 a graphene membrane;   a first electrode proximate a first side of the graphene membrane, the first electrode being electrically conductive; and   a frame comprising an open region;   wherein the graphene membrane is adhered to the frame with an adhesive,   wherein the device is configured to have a frequency response across a frequency range at least from 20 Hz to 20 kHz or across the entire human audible frequency range, and   wherein the device is a microphone or a loudspeaker.   
     
     
         10 . The device of  claim 9 , further comprising:
 a wire in electrical contact with the graphene membrane.   
     
     
         11 . The device of  claim 10 ,
 wherein the wire is a metallic wire.   
     
     
         12 . The device of  claim 9 ,
 wherein the graphene membrane includes about 1 to about 100 layers of graphene.   
     
     
         13 . The device of  claim 9 ,
 wherein the graphene membrane is about 20 nanometers to about 40 nanometers thick.   
     
     
         14 . The device of  claim 9 ,
 wherein the graphene membrane is a multilayer graphene membrane.   
     
     
         15 . The device of  claim 9 ,
 wherein the first electrode includes a silicon wafer.   
     
     
         16 . A device comprising:
 a graphene membrane; and   a first electrode proximate a first side of the graphene membrane, the first electrode being electrically conductive;   wherein the device is configured to have a frequency response across a frequency range at least from 20 Hz to 20 kHz or across the entire human audible frequency range,   wherein the graphene membrane is configured such that air damping dominates power dissipation, and   wherein the device is a microphone or a loudspeaker.   
     
     
         17 . The device of  claim 16 , further comprising:
 a wire in electrical contact with the graphene membrane.   
     
     
         18 . The device of  claim 17 ,
 wherein the wire is a metallic wire.   
     
     
         19 . The device of  claim 16 ,
 wherein the graphene membrane includes about 1 to about 100 layers of graphene.   
     
     
         20 . The device of  claim 16 ,
 wherein the graphene membrane is about 20 nanometers to about 40 nanometers thick.   
     
     
         21 . The device of  claim 16 ,
 wherein the graphene membrane is a multilayer graphene membrane.   
     
     
         22 . The device of  claim 16 ,
 wherein the first electrode includes a silicon wafer.

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