# US 2021/0240302 A1 · Fingerprint recognizable touch sensor and display device including the fingerprint recognizable touch sensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0240302 A1 - Document ID: US20210240302A1 - Status: Published application - Kind: A1 - Application number: 16/984,685 - Filed: 2020-08-04 - Published: 2021-08-05 - Earliest claimed: 2020-02-04 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hongsuk KIM; Dongkyun Kim; Seogwoo Hong; Jinmyoung Kim; Jinhee Nam - Web page: https://patentgrep.com/patent/US20210240302A1 ## CPC - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06V 40/1306: {non-optical, e.g. ultrasonic or capacitive sensing} - G06V 40/1329: {Protecting the fingerprint sensor against damage caused by the finger} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract A touch sensor may include: a touch panel including a plurality of electrodes and a plurality of electrode pads respectively connected to the plurality of electrodes; a bonding layer disposed on and in contact with the plurality of electrode pads; and a printed circuit board including: an insulating layer including a first surface adjacent to the bonding layer and a second surface facing the first surface; a plurality of first bonding pads provided in a first region of the first surface of the insulating layer; a plurality of second bonding pads disposed on the second surface of the insulating layer; and a plurality of extension pads disposed on a second region different from the first region of the first surface of the insulating layer and respectively connected to the plurality of second bonding pads. ## Claims ### Claim 1 A touch sensor comprising: a touch panel comprising a plurality of electrodes and a plurality of electrode pads respectively connected to the plurality of electrodes; a bonding layer disposed on and in contact with the plurality of electrode pads; and a printed circuit board comprising: an insulating layer comprising a first surface adjacent to the bonding layer and a second surface facing the first surface; a plurality of first bonding pads provided in a first region of the first surface of the insulating layer; a plurality of second bonding pads disposed on the second surface of the insulating layer; and a plurality of extension pads disposed on a second region different from the first region of the first surface of the insulating layer and respectively connected to the plurality of second bonding pads. ### Claim 2 (depends on 1) The touch sensor of claim 1, wherein on a plan view of the printed circuit board, the plurality of first bonding pads and the plurality of second bonding pads are alternately arranged in a first direction. ### Claim 3 (depends on 2) The touch sensor of claim 2, wherein the first region and the second region are separated from each other based on a center line that is parallel to the first direction on a surface of the insulating layer. ### Claim 4 (depends on 3) The touch sensor of claim 3, wherein the plurality of first bonding pads and the plurality of extension pads are arranged in a zigzag shape with respect to the center line. ### Claim 5 (depends on 3) The touch sensor of claim 3, wherein on the plan view of the printed circuit board, the plurality of second bonding pads and the plurality of extension pads are located on a same line in a second direction that is perpendicular to the first direction. ### Claim 6 (depends on 3) The touch sensor of claim 3, wherein the plurality of second bonding pads are included in all regions corresponding to the first region and the second region. ### Claim 7 (depends on 1) The touch sensor of claim 1, wherein the insulating layer comprises a plurality of vias that connect the plurality of second bonding pads in a one-to-one correspondence to the plurality of extension pads. ### Claim 8 (depends on 7) The touch sensor of claim 7, wherein the plurality of vias are disposed on an edge of the second region of the insulating layer. ### Claim 9 (depends on 7) The touch sensor of claim 7, wherein the plurality of vias are disposed on an edge separated from a boundary line where the first region and the second region contact each other with the plurality of extension pads therebetween. ### Claim 10 (depends on 7) The touch sensor of claim 7, wherein the plurality of vias are filled with a conductive material. ### Claim 11 (depends on 1) The touch sensor of claim 1, wherein the plurality of electrode pads are disposed on a same plane. ### Claim 12 (depends on 2) The touch sensor of claim 2, wherein the plurality of electrode pads are arranged to be parallel to each other in the first direction. ### Claim 13 (depends on 2) The touch sensor of claim 2, wherein the plurality of electrode pads are arranged in a zigzag shape based on a center line that is parallel to the first direction. ### Claim 14 (depends on 2) The touch sensor of claim 2, wherein on the plan view of the printed circuit board, a separation distance between the first bonding pads and the second bonding pads adjacent to each other is in a range of 15 pm to 35 pm. ### Claim 15 (depends on 1) The touch sensor of claim 1, wherein the bonding layer comprises an anisotropic conductive film layer. ### Claim 16 (depends on 1) The touch sensor of claim 1, wherein the bonding layer comprises a first bonding layer and a second bonding layer that are separated from each other, wherein the first bonding layer is disposed between the plurality of first bonding pads and the plurality of electrode pads, and the second bonding layer is disposed between the plurality of extension pads and the plurality of electrode pads. ### Claim 17 (depends on 1) The touch sensor of claim 1, wherein the printed circuit board comprises either one or both of a chip on film (COF) and a flexible printed circuit board (FPCB). ### Claim 18 (depends on 1) The touch sensor of claim 1, wherein the plurality of electrodes and the plurality of electrode pads are arranged on a substrate including at least one of glass and film. ### Claim 19 (depends on 1) The touch sensor of claim 1, wherein the plurality of electrodes comprises: a plurality of first electrodes extending in a first direction and arranged to be parallel to each other in a second direction perpendicular to the first direction; and a plurality of second electrodes extending in the second direction to cross the plurality of first electrodes and disposed to be parallel to each other in the first direction. ### Claim 20 (depends on 1) A display device comprising: the touch sensor of claim 1; and a display panel disposed on a lower side of the touch panel.