Smartphone MEMS microphone, light micrograph
Light micrograph of a MEMS (MicroElectroMechanical System) microphone wafer. MEMS microphones are installed in nearly all modern smartphones. The image shows a detailed view of the MEMS wafer, you can see a testpin on the wafer of the MEMS unit. The MEMS is mounted together with the amplifier wafer in the small housing. Microscopic contrast technique: Incident differential interference contrast. Magnification: 200x when printed 10 centimetres wide.
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