# US 2021/0242284 A1 · Display device and fabricating method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242284 A1 - Document ID: US20210242284A1 - Status: Published application - Kind: A1 - Application number: 17/167,431 - Filed: 2021-02-04 - Published: 2021-08-05 - Earliest claimed: 2020-02-04 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hyun Young KIM; Jong Ryuk PARK; Ji Youn LEE; Kwang Sik LEE - Web page: https://patentgrep.com/patent/US20210242284A1 ## CPC - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/0443: {using a single layer of sensing electrodes} - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/124: Insulating layers formed between TFT elements and OLED elements - H10K 59/40: OLEDs integrated with touch screens - H10K 71/00: Manufacture or treatment specially adapted for the organic devices covered by this subclass - G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices - G06F 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate - G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof - H05K 2201/09372: Pads and lands - H10K 59/1201: {Manufacture or treatment} - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/873: {Encapsulations} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract Provided is a display device that includes a substrate including a plurality of pixels; a display element layer including a light emitting element provided in each of the pixels; and a touch sensor on the display element layer. The touch sensor may include: a base layer on the display element layer; a first conductive pattern on the base layer; a first insulating layer provided over the first conductive pattern; a second conductive pattern on the first insulating layer; a second insulating layer provided over the second conductive pattern; an intermediate layer on the base layer; and a cover layer provided over the intermediate layer. The intermediate layer and the cover layer may include different materials. ## Claims ### Claim 1 A display device comprising: a substrate including a display region in which a plurality of pixels are provided and a non-display region surrounding at least one side of the display region; a display element layer including a light emitting element provided in each of the pixels; and a touch sensor disposed on the display element layer, wherein the touch sensor includes: a base layer disposed on the display element layer; a first conductive pattern disposed on the base layer; a first insulating layer provided over the first conductive pattern; a second conductive pattern disposed on the first insulating layer; a second insulating layer provided over the second conductive pattern; an intermediate layer disposed on the base layer to correspond to at least a portion of the non-display region; and a cover layer disposed over the intermediate layer, wherein the intermediate layer and the cover layer include different materials. ### Claim 2 (depends on 1) The display device of claim 1, wherein the intermediate layer includes an organic insulating material, and the cover layer includes a conductive material. ### Claim 3 (depends on 2) The display device of claim 2, further comprising a pad provided in at least a portion of the non-display region of the substrate, the pad having a test signal supplied thereto. ### Claim 4 (depends on 3) The display device of claim 3, wherein the intermediate layer is disposed on the display element layer to correspond to the pad. ### Claim 5 (depends on 4) The display device of claim 4, wherein the cover layer completely covers the intermediate layer. ### Claim 6 (depends on 5) The display device of claim 5, wherein each of both end portions of the intermediate layer is spaced apart from each of both end portions of the cover layer at a certain distance. ### Claim 7 (depends on 6) The display device of claim 6, wherein each of both the end portions of the intermediate layer is located inward of each of both the end portions of the cover layer. ### Claim 8 (depends on 5) The display device of claim 5, wherein the second conductive pattern includes: a plurality of first sensor patterns disposed on the first insulating layer, the plurality of first sensor patterns extending in a first direction; a plurality of second sensor patterns disposed on the first insulating layer, the plurality of second sensor patterns extending in a second direction different from the first direction, the plurality of second sensor patterns being spaced apart from the first sensor patterns; and a plurality of second bridge patterns connecting the second sensor patterns, wherein the first conductive pattern includes a plurality of first bridge patterns disposed on the base layer, the plurality of first bridge patterns connecting the first sensor patterns. ### Claim 9 (depends on 8) The display device of claim 8, wherein the cover layer is provided on the same layer as the first bridge patterns and includes the same material as the first bridge patterns. ### Claim 10 (depends on 8) The display device of claim 8, wherein the cover layer includes: a first cover layer provided in the same layer as the first bridge patterns, the first cover layer including the same material as the first bridge patterns; and a second cover layer provided in the same layer as the first and second sensor patterns and the second bridge patterns, the second cover layer including the same material as the first and second sensor patterns and the second bridge patterns. ### Claim 11 (depends on 8) The display device of claim 8, further comprising a pixel circuit layer disposed between the substrate and the display element layer. ### Claim 12 (depends on 11) The display device of claim 11, wherein the pixel circuit layer includes at least one transistor disposed on the substrate and a passivation layer covering the transistor, wherein the display element layer further includes a pixel defining layer disposed on the passivation layer, the pixel defining layer defining an emission region of each of the pixels. ### Claim 13 (depends on 12) The display device of claim 12, wherein the passivation layer includes a first opening exposing at least a portion of the pad in the non-display region, and the pixel defining layer includes a second opening exposing at least a portion of the pad in the non-display region, wherein a width of the first opening and a width of the second opening are different from each other. ### Claim 14 (depends on 13) The display device of claim 13, wherein, when viewed on a section, both side surfaces of the first opening are located inward of both side surfaces of the second opening. ### Claim 15 (depends on 14) The display device of claim 14, wherein the intermediate layer is provided in a shape filling the first and second openings. ### Claim 16 A method of fabricating a display device, the method comprising: providing a substrate including a display region and a non-display region; forming a plurality of transistors in the display region, and forming a pad having a test signal supplied thereto in at least a portion of the non-display region; forming a passivation layer over the transistors and the pad; forming a display element layer including light emitting elements on the passivation layer; and forming a touch sensor on the display element layer, wherein the forming of the touch sensor includes: forming a base layer on the display element layer; forming an intermediate layer on the base layer to correspond to the pad; forming first bridge patterns on the base layer corresponding to the display region, and forming a cover layer over the intermediate layer; forming a first insulating layer over the first bridge patterns and the cover layer; forming a plurality of first sensor patterns, a plurality of second sensor patterns, and a plurality of second bridge patterns on the first insulating layer corresponding to the display region; and forming a second insulating layer over the first sensor patterns, the second sensor patterns, and the second bridge patterns, wherein the cover layer is provided in a shape completely covering the intermediate layer. ### Claim 17 (depends on 16) The method of claim 16, wherein the intermediate layer includes an organic insulating material, and the cover layer includes a conductive material. ### Claim 18 (depends on 17) The method of claim 17, wherein the forming of the cover layer includes: forming a conductive layer on the intermediate layer; forming, on the conductive layer, a photosensitive pattern including an opening exposing one region of the conductive layer; removing the exposed region of the conductive layer by performing an etching process, using the photosensitive pattern as a mask; and removing the photosensitive pattern. ### Claim 19 (depends on 18) The method of claim 18, wherein each of both end portions of the intermediate layer is spaced apart from each of both end portions of the cover layer at a certain distance. ### Claim 20 (depends on 19) The method of claim 19, wherein each of both the end portions of the intermediate layer is located inward of the each of both the end portions of the cover layer.