Fingerprint identification device and manufacture method thereof

Abstract

The invention provides a fingerprint identification device and a manufacture method thereof. The fingerprint identification device comprises a transparent cover plate, a first light shield layer, a pattern layer and a fingerprint identifier; the transparent cover plate includes an inner surface; the inner surface includes a first area and a second area adjacent to the first area; the first light shield layer is arranged in the first area of the inner surface, and includes a first bottom surface opposite to the inner surface; the pattern layer is arranged in the second area of the inner surface, the color of the pattern layer is different from that of the first light shield layer, and the pattern layer includes a second bottom surface opposite to the inner surface; the maximal segment difference between the first bottom surface and the second bottom surface is lower than or equivalent to 6 micrometer; and at least part of the first shield layer and the pattern layer is placed between the fingerprint identifier and the transparent cover plate. Thus, influence of the light shield layer and the pattern layer on the sensitivity of the fingerprint identifier is reduced, and the sensitivity of fingerprint identification is improved.

Description

technical field [0001] The invention relates to an electronic device, and in particular to a fingerprint recognition device and a manufacturing method thereof. Background technique [0002] Since the fingerprint identification technology can play a good role in anti-theft and personal privacy protection, it has been gradually applied to mobile devices in recent years to prevent the mobile device from being stolen. Specifically, such mobile devices include covers, fingerprint readers, and touch display devices. The touch display device is arranged in the central area of ​​the inner surface of the cover for user operation and information display. The fingerprint recognizer is arranged on the peripheral area of ​​the inner surface of the cover to identify the user's fingerprint. [0003] In order to shield the peripheral wires of the touch display device, a light-shielding layer is provided on the peripheral area of ​​the inner surface of the cover plate. In addition, in ord...

AI Technical Summary

Problems solved by technology

However, since both the light-shielding layer and the pattern layer are coated on the inner surface of the cover plate by printing, although theoretically the raw material of the pattern layer can only be coated on the exposed parts of the light-shielding layer, in practice, printing tolerances will vary. A small amount of pattern layer material is covered on the light-shielding layer, causing the lower surface of the pattern layer to be farther away from the cover plate than the lower surface of the light-shielding layer, resulting in a step difference

Such a step difference will increase the distance from the top surface of the fingerprint reader to the outer surface of the cover, reduce the sensitivity of fingerprint recognition, and even cause the fingerprint reader to be unable to effectively perform fingerprint recognition.

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