How do AuthenTec fingerprint sensors work?

AuthenTec sensors use a unique semiconductor-based fingerprint reader that uses small RF signals to detect the fingerprint ridge and valley pattern, thus capturing sharp and clear fingerprint patterns from the live layer of skin just beneath the surface. The RF electronic imaging mechanism, called TruePrint technology, makes AuthenTec’s sensors less affected by common skin surface conditions -- including dry, worn, calloused, dirty or oily skin -- that can impair the ability of other sensors to acquire accurate fingerprint images. This approach, which is in marked contrast with optical, thermal and DC capacitive solutions that read the surface of the skin, gives AuthenTec sensors significant advantages in image quality and in the protective coatings that the sensor can image through.

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