Patent ID: 11973099
Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A fingerprint identification module having a fingerprint identification area and a peripheral area surrounding the fingerprint identification area, comprising:
a first substrate comprising a first base layer and a first light-shielding layer on the first base layer, wherein the first base is transparent, the first light-shielding layer is opaque and defines a plurality of first through holes spaced apart from each other;
a second substrate comprising a second base layer, a plurality of optical sensors on the second base layer and spaced apart from each other, and a second light-shielding layer on a side of the plurality of optical sensors away from the second base layer, wherein the second base layer is transparent, the second light-shielding layer is opaque and defines a plurality of second through holes spaced apart from each other, each of the plurality of second through holes exposes a corresponding one of the plurality of optical sensors and is aligned with a corresponding one of the plurality of first through holes, the first light-shielding layer, the plurality of optical sensors, and the second light-shielding layer are sequentially sandwiched between the first base layer and the second base layer;
a supporting portion between the first base layer and the second base layer and arranged in the peripheral area, wherein the supporting portion bonds the first substrate and the second substrate together and maintains a distance between the first substrate and the second substrate; and
a gap portion between the first substrate and the second substrate and arranged in the fingerprint identification area,
wherein the plurality of optical sensors is configured to receive and sense an optical signal which is reflected by a fingerprint, then collimated by the plurality of first through holes, the gap portion, and the plurality of second through holes, and the plurality of the optical sensors collects an image of the fingerprint;
the first substrate further comprises a third light-shielding layer, the third light-shielding layer defines a plurality of third through holes spaced apart from each other, and each of the plurality of third through holes is aligned with the corresponding one of the plurality of first through holes and a corresponding one of the plurality of second through holes; and
a maximum imaging size of the optical signal reflected by the fingerprint on the second substrate after being collimated sequentially by the plurality of first through holes, the plurality of third through holes and the gap portion is less than a distance between any two adjacent ones of the plurality of optical sensors.