MEMS and sensors

What is the general ink ejection method of inkjet printer heads made with MEMS technology?

  1. ALetting ink fall naturally by gravity
  2. BCharging the ink and attracting it with magnets
  3. CPushing out ink with the deformation of a piezoelectric element or the pressure of a bubble formed by a heater
Show answer and explanation

Answer: C. Pushing out ink with the deformation of a piezoelectric element or the pressure of a bubble formed by a heater

Inkjet heads use either the piezo method, in which voltage deforms a piezoelectric element and the pressure pushes ink out, or the thermal method, in which a heater instantly heats ink to form a bubble whose pressure pushes ink out. The fine nozzles and channels are made with MEMS technology.

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More MEMS and sensors questions

  1. Which phenomenon do BAW filters, used as RF filters in smartphones and similar devices, use?
  2. What is the main reason for sealing the moving parts of MEMS gyroscopes and similar devices in vacuum?
  3. What is the phenomenon called in which tiny moving parts stick to the substrate due to surface tension or similar forces during MEMS fabrication or use, and stop moving?
  4. What is the detection principle of semiconductor gas sensors using tin oxide or similar materials?
  5. What does the sensor used in a smartphone's electronic compass detect?