![]() ![]() In traditional devices, the die and the bezel are packaged in the sensor assembly leading to a large size. The point is to bring the finger in contact with the bezel and the die at the same time. ![]() The bezel is typically at the upper edge of the die and is either parallel or coplanar with the top die surface. In one embodiment, a small current is injected into the finger that is to be sensed using a conductive bezel. ![]() There are many different embodiments of these technologies. Live blog: Microsoft’s Build conference keynote Within the capacitive category, there are passive capacitance sensors and active capacitance sensors. There are three basic types of fingerprint sensors optical, ultrasonic, and capacitive. First is a die that contains the sensor and circuits. In this case, Apple reduces the size of the fingerprint reader (which I’ll address further below) by encasing the die and the bezel in a unitary encapsulation.įor the sake of simplicity, a fingerprint reader consists of two basic components. The secret of fingerprint readers became public in Application Number 20130154031 filed with the U.S. ![]()
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