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US 11,600,095 B2Granted
Optical fingerprint sensors
AssigneeVisEra Technologies Company Limited
InventorsWei-Ko Wang, Yi-Hua Chiu
Life of this patent
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Abstract
An optical fingerprint sensor is provided. The optical fingerprint sensor includes a substrate, a plurality of light-shielding layers and a plurality of groups of microlenses. The substrate has a plurality of photoelectric conversion units disposed therein. The light-shielding layers are sequentially disposed on the substrate. Each light-shielding layer includes a plurality of apertures formed therein. Each group of microlenses is disposed above the apertures formed in an uppermost light-shielding layer and overlies one photoelectric conversion unit.
Claims19
An optical fingerprint sensor, comprising:
- a substrate having a plurality of photoelectric conversion units;
- a first light-shielding layer disposed on the substrate, the first light-shielding layer having a plurality of first apertures;
- and
- a second light-shielding layer disposed over the first light-shielding layer, the second light-shielding layer having a plurality of groups of second apertures, wherein each first aperture corresponds to each group of the second apertures;
- wherein each group of the second apertures comprises a central aperture and a plurality of peripheral apertures surrounding the central aperture, the plurality of peripheral apertures being arranged so that center points of the plurality of peripheral apertures are separated from a center point of the central aperture by the same distance and the plurality of peripheral apertures form an octagon when the center points of the plurality of peripheral apertures are connected.
2 more elements
An optical fingerprint sensor, comprising:
- a substrate having a plurality of photoelectric conversion units;
- a first light-shielding layer disposed on the substrate, the first light-shielding layer having a plurality of first apertures;
- a second light-shielding layer disposed over the first light-shielding layer, the second light-shielding layer having a plurality of groups of second apertures, wherein each first aperture corresponds to each group of the second apertures, wherein each group of the second apertures comprises a central aperture and a plurality of peripheral apertures surrounding the central aperture, the plurality of peripheral apertures being arranged so that center points of the plurality of peripheral apertures are separated from a center point of the central aperture by the same distance and the plurality of peripheral apertures form a hexagon or an octagon when the center points of the plurality of peripheral apertures are connected;
- and
- a plurality of groups of microlenses disposed on the second light-shielding layer,
- wherein each group of the microlenses comprises a central microlens and a plurality of peripheral microlenses surrounding the central microlens, the central microlens in each group of the microlenses is located on the central aperture in each group of the second apertures, and the peripheral microlenses in each group of the microlenses are respectively located on the peripheral apertures in each group of the second apertures, and
- wherein there is a pitch between two central microlenses respectively in adjacent group of the microlenses, and the pitch is in a range from 40 μm to 100 μm.
4 more elements
An optical fingerprint sensor, comprising:
- a substrate having a plurality of photoelectric conversion units;
- a first light-shielding layer disposed on the substrate, the first light-shielding layer having a plurality of first apertures;
- a second light-shielding layer disposed over the first light-shielding layer, the second light-shielding layer having a plurality of groups of second apertures, wherein each first aperture corresponds to each group of the second apertures, wherein each group of the second apertures comprises a central aperture and a plurality of peripheral apertures surrounding the central aperture, the plurality of peripheral apertures being arranged so that center points of the plurality of peripheral apertures are separated from a center point of the central aperture by the same distance and the plurality of peripheral apertures form a hexagon or an octagon when the center points of the plurality of peripheral apertures are connected;
- and
- a plurality of groups of microlenses disposed on the second light-shielding layer,
- wherein each group of the microlenses comprises a central microlens and a plurality of peripheral microlenses surrounding the central microlens, the central microlens in each group of the microlenses is located on the central aperture in each group of the second apertures, and the peripheral microlenses in each group of the microlenses are respectively located on the peripheral apertures in each group of the second apertures, and
- wherein the central microlenses and the peripheral microlenses have diameters which are in a range from 5 μm to 30 μm.
4 more elements
Dependencies are inferred from the claim text.