Keyson Moment丨What is semiconductor fingerprint recognition?

Semiconductor fingerprint recognition is divided into capacitive and inductive types. The principles of the two are similar. On a “flat plate” with thousands of semiconductor devices, the finger is placed on it and forms the other side of the capacitor (inductor). Because the finger plane is uneven, the actual distance between the convex and concave points in contact with the flat plate is different, resulting in different capacitance (inductance) values. The device summarizes the different values ​​collected based on this principle to complete the fingerprint collection.

Advantages: closer to live body recognition, very high sensitivity and recognition accuracy, low power consumption, and small fingerprint head size.

Disadvantages: relatively high cost.