During a conversation today with a couple of entrepreneurs today, we started enumerating the current applications of MEMS beyond the obvious Ink Jet printer heads, DLPs and automotive crash sensors. Here is what we came up with during our few minutes on the topic (no particular order):

Mature applications:
  • Pressure sensors (automotive, medical, consumer, ...)
  • Accelerometers
  • Display Light Modulators (TI DLP, Sony Grating devices)
  • Bio-Assay devices (Lab on a chip)
Emerging applications:
  • Gyroscopes
  • Relays (ATE and RF applications)
  • Microphones
  • Memory elements
  • Crystal and filter replacements
Future ideas:
  • Microfluidic pumps (gasses and liquids)
  • Micromotors
I'm sure there are others that I've forgotten or am not aware of - but this list had more items on it than I thought that it would. Let me know if you know of others too.