# US 2021/0280818 A1 · Display device and method of fabricating the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0280818 A1 - Document ID: US20210280818A1 - Status: Published application - Kind: A1 - Application number: 17/077,914 - Filed: 2020-10-22 - Published: 2021-09-09 - Earliest claimed: 2020-03-06 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Kyung Rok KO; Tae Oh KIM; Byung Hoon KIM; Jung Hyun KIM; June Hyoung PARK - Web page: https://patentgrep.com/patent/US20210280818A1 ## CPC - H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants} - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3266: Details of drivers for scan electrodes - G09G 2300/0426: Layout of electrodes and connections - H10K 59/1201: {Manufacture or treatment} - H10K 59/873: {Encapsulations} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - 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) ## Abstract A display device includes a display panel including a display area and a non-display area surrounding the display area, an encapsulation substrate disposed on the display panel, a sealing member disposed between the display panel and the encapsulation substrate to bond the display panel and the encapsulation substrate together and a first fusion pattern disposed inside the display panel, the sealing member and the encapsulation substrate, where the display panel comprises a trench formed in the non-display area and recessed into a portion of an upper surface of the display panel, the sealing member is inserted into the trench, and the first fusion pattern is disposed to overlap the trench. ## Claims ### Claim 1 A display device comprising: a display panel comprising a display area and a non-display area surrounding the display area; an encapsulation substrate disposed on the display panel; a sealing member disposed between the display panel and the encapsulation substrate to bond the display panel and the encapsulation substrate together; and a first fusion pattern disposed inside the display panel, the sealing member and the encapsulation substrate, wherein a trench is defined in the non-display area of the display panel and recessed from an upper surface of the display panel, the sealing member is inserted into the trench, and the first fusion pattern is disposed to overlap the trench. ### Claim 2 (depends on 1) The display device of claim 1, wherein the first fusion pattern includes a material of the sealing member, a material of the display panel and a material of the encapsulation substrate, which are mixed with each other. ### Claim 3 (depends on 2) The display device of claim 2, wherein the sealing member includes at least a portion directly contacting the trench and the encapsulation substrate such that a first boundary surface contacting the trench and a second boundary surface contacting the encapsulation substrate are defined, and no physical boundary exists in a portion of the first fusion pattern corresponding to an extension line of each of the first boundary surface and the second boundary surface. ### Claim 4 (depends on 3) The display device of claim 3, wherein the first fusion pattern comprises a first portion overlapping the display panel, a second portion contacting the sealing member and a third portion overlapping the encapsulation substrate, and the first fusion pattern includes a third boundary surface between the second portion and the sealing member, a fourth boundary surface between the first portion and the display panel and a fifth boundary surface between the third portion and the encapsulation substrate. ### Claim 5 (depends on 4) The display device of claim 4, wherein the third portion of the first fusion pattern comprises the material of the sealing member, and the second portion comprises the material of the encapsulation substrate. ### Claim 6 (depends on 2) The display device of claim 2, wherein the first fusion pattern comprises a fusion area, in which the sealing member, the display panel and the encapsulation substrate are partially fused, and a molten area which surrounds the fusion area. ### Claim 7 (depends on 6) The display device of claim 6, wherein the fusion area comprises a portion which becomes wider as being away farther from the display panel toward the encapsulation substrate. ### Claim 8 (depends on 2) The display device of claim 2, wherein the sealing member comprises a frit through which light is transmitted. ### Claim 9 (depends on 8) The display device of claim 8, wherein a side surface of the sealing member are inclined, and an inner wall of the trench is inclined to correspond to the side surface of the sealing member. ### Claim 10 (depends on 8) The display device of claim 8, wherein a maximum width of the sealing member is in a range of about 10 μm to about 100 μm, and a maximum width of the first fusion pattern is in a range of about 8 μm to about 12 μm. ### Claim 11 (depends on 2) The display device of claim 2, further comprising: a second fusion pattern disposed in a periphery of the non-display area between the display panel and the encapsulation substrate, wherein the second fusion pattern includes the material of the display panel and the material of the encapsulation substrate. ### Claim 12 (depends on 11) The display device of claim 11, wherein the second fusion pattern does not overlap the sealing member and the trench in a thickness direction. ### Claim 13 (depends on 11) The display device of claim 11, wherein the first fusion pattern comprises the material of the sealing member, and the second fusion pattern does not comprise the material of the sealing member. ### Claim 14 (depends on 2) The display device of claim 2, wherein the display panel comprises a base substrate and a metal wiring layer disposed on at least a portion of the base substrate, and the metal wiring layer comprises a portion disposed on an upper surface of the base substrate and a bridge portion spaced apart from the trench and disposed inside the base substrate. ### Claim 15 A display device comprising: a first substrate comprising a display area in which a plurality of light emitting elements are disposed and a non-display area surrounding the display area; a second substrate disposed on the first substrate; a sealing member disposed between the first substrate and the second substrate and disposed in the non-display area to surround the display area; and a first fusion pattern disposed between the first substrate and the second substrate to overlap the sealing member, wherein a trench is defined in the non-display area of the first substrate to surround the display area, and the first fusion pattern overlaps the trench to have a closed curve shape surrounding the display area. ### Claim 16 (depends on 15) The display device of claim 15, wherein a maximum width of the trench is smaller than a maximum width of the sealing member, and at least a portion of the sealing member is inserted into the trench. ### Claim 17 (depends on 16) The display device of claim 16, wherein the maximum width of the sealing member is in a range of about 10 μm to about 100 μm, and a maximum width of the first fusion pattern is in a range of about 8 μm to about 12 μm. ### Claim 18 (depends on 15) The display device of claim 15, wherein the first fusion pattern comprises a material of the sealing member, a material of the first substrate and a material of the second substrate, which are mixed with each other. ### Claim 19 (depends on 18) The display device of claim 18, further comprising: a second fusion pattern disposed in a periphery of the non-display area between the first substrate and the second substrate, wherein the second fusion pattern surrounds the sealing member. ### Claim 20 A method of fabricating a display device, the method comprising: preparing a first substrate which comprises a display area and a non-display area surrounding the display area, and forming a trench which is recessed from an upper surface of the first substrate by radiating a first pulsed laser to the non-display area; preparing a second substrate, on which a sealing member is disposed, and attaching the first substrate and the second substrate to each other such that the sealing member is inserted into the trench; and forming a first fusion pattern, in which a material of the sealing member, a material of the first substrate and a material of the second substrate are mixed with each other, by radiating a second pulsed laser to the sealing member disposed between the first substrate and the second substrate. ### Claim 21 (depends on 20) The method of claim 20, wherein the first fusion pattern is formed by mixing the material of the sealing member, the material of the first substrate and the material of the second substrate. ### Claim 22 (depends on 21) The method of claim 21, wherein a focus of the second pulsed laser is set inside the first substrate at a distance from the trench. ### Claim 23 (depends on 21) The method of claim 21, wherein the trench is formed to surround the display area, and the sealing member and the first fusion pattern are provided to surround the display area to have a closed curve shape. ### Claim 24 (depends on 21) The method of claim 21, further comprising: forming a second fusion pattern, in which the material of the first substrate and the material of the second substrate are mixed with each other, by radiating a third pulsed laser along the outside of the sealing member, wherein a focus of the third pulsed laser is set inside the first substrate. ### Claim 25 (depends on 24) The method of claim 24, wherein the second fusion pattern is formed by fusing the first substrate and the second substrate with each other and is formed to surround the sealing member.