MEMS and sensors

Which technology builds tiny channels on a chip to perform chemical analysis or testing with small amounts of liquid?

  1. AMicrofluidic devices (lab-on-a-chip)
  2. BPhotomask
  3. CBonding wire
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Answer: A. Microfluidic devices (lab-on-a-chip)

Microfluidic devices use MEMS fabrication to form channels tens to hundreds of micrometers wide, along with mixing and reaction regions, on a chip, enabling analysis and testing with tiny samples. Also called lab-on-a-chip, they are used for rapid medical diagnostics, genetic analysis and more.

  • A. Correct. Analysis is done in tiny channels on a chip.
  • B. A photomask is the master for transferring circuit patterns by exposure.
  • C. A bonding wire is a thin metal wire connecting a chip to its terminals.
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More MEMS and sensors questions

  1. What is the principle of the NDIR gas sensor often used to measure indoor carbon dioxide (CO2) concentration?
  2. Which MEMS-fabricated ultrasonic elements are sometimes used in under-display fingerprint sensors in smartphones and in medical ultrasound?
  3. In surface micromachining, what problem occurs if a structural thin film such as polysilicon has large internal residual stress?
  4. In a MEMS electrostatic actuator, if the voltage between two parallel electrodes is doubled, by roughly what factor does the electrostatic attraction between them change? (Assume the gap is unchanged.)
  5. When choosing the measurement range of a MEMS accelerometer (for example, ±2 g versus ±16 g), which reasoning is correct?