Nokia continues to show its interest in graphene by filing another patent which uses the miracle material as an integral component. US patent application number WO2012120457 with the title ” An Apparatus For Transducing a Surface Acoustic Wave” describes an apparatus in which graphene is used to convert surface acoustic waves into an electrical signal. The application was filed in March this year. The device is aimed for use in high-frequency acoustic-to-electric converters, where conventional silicon devices are too slow.
Surface acoustic waves are used in some touchscreens. The patent application, however, does not specifically mention that the device could be used for touchscreen technology, although it does allow for quartz, a transparent material, to be used as the substrate which supports the surface wave. The patent application confirms Nokia’s intent on considering graphene as a material for future use in their devices.