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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11715323 B1

PDFFull Text
Date of Patent:
Aug. 01, 2023

Filed:

Apr. 08, 2022

Fingerprint sensing device

Applicant:

AU Optronics Corporation, Hsinchu, TW;

Inventors:

Shih-Hua Lu, Hsinchu, TW;

Chao-Chien Chiu, Hsinchu, TW;

Assignee:

Au Optronics Corporation, Hsinchu, TW;

Attorney:

JCIPRNET

Primary Examiner:

Abdul-Samad A Adediran

Int. Cl.
CPC ...
G06F 3/042 (2006.01); G06V 40/13 (2022.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01); H01L 27/146 (2006.01); H10K 39/32 (2023.01);
U.S. Cl.
CPC ...
G06V 40/1318 (2022.01); G02F 1/13338 (2013.01); G02F 1/133512 (2013.01); G02F 1/133526 (2013.01); G06F 3/042 (2013.01); G06V 40/1324 (2022.01); H01L 27/14621 (2013.01); H01L 27/14623 (2013.01); H01L 27/14627 (2013.01); H01L 27/14678 (2013.01); H10K 39/32 (2023.02); G02F 2201/56 (2013.01);
Abstract

A fingerprint sensing device includes a first substrate, a sensing element layer, a second substrate, a micro-structure layer, and a spacer layer. The sensing element layer is located on the first substrate and includes multiple sensing elements. The second substrate is located on the sensing element layer. The micro-structure layer is located between the second substrate and the sensing element layer, and includes multiple micro-lens structures and multiple dummy structures. Orthogonal projections of the micro-lens structures on the first substrate overlap orthogonal projections of the sensing elements on the first substrate. The spacer layer is located between the second substrate and the sensing element layer, and includes multiple main spacers. Each of the main spacers covers at least one of the dummy structures.

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