Fingerprint reading sensor capable of removing residual fingerprints

Abstract

The invention provides a fingerprint reading sensor capable of removing residual fingerprints. The fingerprint reading sensor capable of removing the residual fingerprints comprises a semiconductor fingerprint reading sensor body, wherein a fingerprint reading part of the semiconductor fingerprint reading sensor body comprises electrodes distributed in an array and meshes between the electrodes, the semiconductor fingerprint reading sensor body is coated with a coating, and grooves are engraved in the surface of the coating along the meshes in the longitudinal direction or the transverse direction of the meshes. Alternatively, an anatase type titanium oxide thin film can be arranged on the surface the coating in a lamination mode, and then grooves are engraved in the thin film. The fingerprint reading sensor capable of removing the residual fingerprints has the advantages that sweat drops which form the residual fingerprints are made to flow away along the grooves, the graphic trace of the residual fingerprints is damaged, and therefore malicious use of the residual fingerprints is prevented.

Description

technical field [0001] The invention relates to a fingerprint reading sensor, in particular to a fingerprint reading sensor capable of eliminating residual fingerprints. Background technique [0002] When using fingerprints as a means of personal identification, the existence of criminal activities using forged fingerprints (simulated fingerprints) is one of the problems to be overcome in the future. In recent years, at Japanese airports, fingerprint systems have been used to verify criminal records of foreign tourists. There have been news reports that women who copied other people's fake fingerprints and pasted them on their own fingers easily passed the customs inspection. The news is also widely presented abroad. [0003] On the other hand, collecting residual fingerprints is also known as a method of stealing other people's fingerprints. [0004] When using a contact-type fingerprint reading sensor to read fingerprints for personal authentication, the sweat oozing fro...

AI Technical Summary

Problems solved by technology

[0007] However, in the traditional technology of taking comparative fingerprint images by finger touch on a fixed sensor surface, the problem of "residual fingerprints" is a big problem that must be overcome

In addition, when the discharge and copying substances of the finger are attached to the surface of the sensor, they will adhere to the finger of the next tester, which is not only a hygienic problem, but also seriously affects the acceptance of the testee.

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