E-Field technology creates a field between the finger and the adjacent semiconductor that mimics the shape of the ridges and valleys of the finger´s epidemal layer. An under-pixel amplifier is used to measure the signals. The sensors operate together to a clearer image that accurately corresponds to the pattern of the fingerprint and results in a clearer image than optical or DC capactivive technologies produce. This allows E-Field Technology to acquire fingers that other technologies cannot. 

With E-Field technology, antenna arrays measure the skin´s subsurface features by generating and detecting linear field geometries the live layer of skin cells is originated beneath the skin´s surface.

This is in contrast to the spherical or tubular field geometries generated by simple capacitive sensor, which only read the very top surface of the skin. As a result, fingers that are difficult or impossible to acquire using capacitive sensors can be successfully acquired with E-field Technology.

Recently there exists also a swipe sensor with E-field technology, which is due to be announced for release within the next few months.

One disadvantage is the low resolution of the images and the small image area, what is leading to a higher Equal-Error-Rate (EER).