# US 10,372,961 B2 · Fingerprint sensor, fingerprint sensor module, and method for manufacturing fingerprint sensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,372,961 B2 - Document ID: US10372961B2 - Status: Granted - Kind: B2 - Application number: 15/469,755 - Filed: 2017-03-27 - Published: 2017-10-05 - Granted: 2019-08-06 - Earliest claimed: 2016-03-30 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Fumihito Shibano; Hiroshi Mizuhashi; Toshinori Uehara; Kimiyo Nonoyama; Hayato Kurasawa - Web page: https://patentgrep.com/patent/US10372961B2 ## CPC - G06V 40/1306: {non-optical, e.g. ultrasonic or capacitive sensing} - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract According to an aspect, a fingerprint sensor includes a first glass substrate, a second glass substrate, and a plurality of sensor electrodes between the first glass substrate and the second glass substrate. The first glass substrate and the second glass substrate are bonded together by a sealing material with the plurality of sensor electrodes interposed therebetween. ## Claims ### Claim 1 A fingerprint sensor comprising: a first glass substrate; a second glass substrate; and a plurality of sensor electrodes between the first glass substrate and the second glass substrate, wherein the first glass substrate and the second glass substrate are bonded together by a sealing material with the plurality of sensor electrodes interposed therebetween, wherein a gap between the first glass substrate and the second glass substrate is filled with a filler material, and wherein the filler material is on the plurality of sensor electrodes and is a non-displaying liquid crystal. ### Claim 2 (depends on 1) The fingerprint sensor according to claim 1, wherein at least one of the first glass substrate or the second glass substrate has a thickness in a range of 100 μm to 300 μm. ### Claim 3 (depends on 1) The fingerprint sensor according to claim 1, wherein the plurality of sensor electrodes exists above the first glass substrate. ### Claim 4 (depends on 1) The fingerprint sensor according to claim 1, wherein the sealing material exists so as to overlap a frame region lying outside a detection region in which the plurality of sensor electrodes exists. ### Claim 5 (depends on 1) The fingerprint sensor according to claim 1, further comprising a plurality of signal lines on the first glass substrate, wherein the plurality of signal lines is configured to perform at least one selected from a group consisting of: supply a drive signal to each of the plurality of sensor electrodes; and output a detection signal from each of the plurality of sensor electrodes. ### Claim 6 (depends on 5) The fingerprint sensor according to claim 5, further comprising a plurality of control lines on the first glass substrate and a plurality of switching elements on the first glass substrate, wherein each of the plurality of signal lines is configured to perform the at least one selected from the group through each of the plurality of switching elements, and each of the plurality of control lines is configured to sequentially select at least one of the plurality of sensor electrodes to be driven through at least one of the plurality of switching elements. ### Claim 7 (depends on 6) The fingerprint sensor according to claim 6, further comprising a first counter electrode, wherein the first counter electrode exists between the plurality of sensor electrodes and the plurality of signal lines or between the plurality of sensor electrodes and the plurality of control lines. ### Claim 8 (depends on 7) The fingerprint sensor according to claim 7, further comprising a second counter electrode on the second glass substrate. ### Claim 9 (depends on 8) The fingerprint sensor according to claim 8, wherein the first counter electrode and the second counter electrode are configured to serve as guard electrodes. ### Claim 10 (depends on 1) The fingerprint sensor according to claim 1, further comprising a sensor drive electrode on the second glass substrate. ### Claim 11 (depends on 10) The fingerprint sensor according to claim 10, wherein at least one of the plurality of sensor electrodes is configured to receive a drive signal transmitted from the sensor drive electrode. ### Claim 12 (depends on 1) The fingerprint sensor according to claim 1, wherein the plurality of sensor electrodes has a resolution corresponding to a pixel resolution in a range of 250 to 1000 pixels per inch (PPI). ### Claim 13 (depends on 1) The fingerprint sensor according to claim 1, wherein every side of the first glass substrate and the second glass substrate has a length in a range of 5 mm to 30 mm. ### Claim 14 (depends on 1) The fingerprint sensor according to claim 1, further comprising a decorative layer on the second glass substrate. ### Claim 15 (depends on 1) A fingerprint sensor module comprising: the fingerprint sensor according to claim 1; and a controller configured to transmit and receive signals between the fingerprint sensor and an external electronic apparatus. ### Claim 16 (depends on 15) The fingerprint sensor module according to claim 15, further comprising a flexible substrate coupled to at least one of the first glass substrate or the second glass substrate, wherein the controller exists on the flexible substrate. ### Claim 17 A method for manufacturing a fingerprint sensor, the method comprising sealing a plurality of sensor electrodes between a first glass substrate and a second glass substrate such that a gap between the first glass substrate and the second glass substrate is filled with a filler material, wherein the filler material is on the plurality of sensor electrodes and is a non-displaying liquid crystal, and then performing wet etching to adjust a thicknesses of the first glass substrate and the second glass substrate to be in a range of 100 μm to 300 μm. ### Claim 18 (depends on 1) The fingerprint sensor according to claim 1, further comprising a spacer arranged between the first substrate and the second substrate. ### Claim 19 (depends on 18) The fingerprint sensor according to claim 18, wherein a height of the spacer is smaller than a height of the sealing material. ### Claim 20 (depends on 1) The fingerprint sensor according to claim 1, wherein a part of the sensor electrodes is overlapped with the sealing material.