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Sweep (or swipe) reading


When using a silicon sensor, the cost of the sensor is directly linked to the silicon area. To reduce the cost, sweep sensing has been proposed (see patent): the sensor has the shape of a small bar, and the user sweeps his/her finger over the bar. Small slices of fingerprint are collected, and the whole fingerprint information is available at lower cost.


Common pro/cons of sweep reading are:

  • This is not a natural way of acquisition; user has to learn how to use it.
  • The reader is always clean: each swipe cleans the sensor.
  • No latent print on the sensor.
  • No feeling of "leaving" his/her fingerprint: the swipe is short.

wafer area swipe

sweep ani


The very first commercial sweep sensor was the FingerChip using the thermal effect.


History of sweep fingerprint sensors.


Original Text:






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