# US 11,444,264 B2 · Display apparatus and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,264 B2 - Document ID: US11444264B2 - Status: Granted - Kind: B2 - Application number: 16/929,334 - Filed: 2020-07-15 - Published: 2020-11-05 - Granted: 2022-09-13 - Earliest claimed: 2018-10-26 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hun Kim; Changhyun Ko - Web page: https://patentgrep.com/patent/US11444264B2 ## CPC - H10K 71/70: Testing, e.g. accelerated lifetime tests - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K 77/111: {Flexible substrates} - H10K 59/124: Insulating layers formed between TFT elements and OLED elements - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/8723: {Vertical spacers, e.g. arranged between the sealing arrangement and the OLED} - Y02E 10/549: Organic PV cells - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A display apparatus including a substrate; a display area arranged on the substrate and including a plurality of pixels, and a peripheral area arranged outside the display area; a dam surrounding the display area; a crack detector arranged between the dam and an end of the substrate and electrically connected to at least one of the plurality of pixels; a crack prevention dam arranged between the dam and the end of the substrate; and an encapsulation layer including a first inorganic layer, an organic layer, and a second inorganic layer, each covering the display area and a portion of the peripheral area. The first inorganic layer and the second inorganic layer in the encapsulation layer extend to the end of the substrate. ## Claims ### Claim 1 A display apparatus comprising: a substrate; a display area arranged on the substrate and comprising a plurality of pixels, and a peripheral area arranged outside the display area; a first dam surrounding the display area; a peripheral crack detection circuit arranged between the first dam and an end of the substrate and electrically connected to at least one of the plurality of pixels; a second dam arranged between the first dam and the end of the substrate; and an encapsulation layer comprising a first inorganic layer, an organic layer, and a second inorganic layer, each covering the display area and a portion of the peripheral area, wherein: the first inorganic layer and the second inorganic layer in the encapsulation layer extend to the end of the substrate; and the peripheral crack detection circuit comprises a plurality of crack detection wires arranged on a same layer. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein the second dam is arranged between the peripheral crack detection circuit and the end of the substrate. ### Claim 3 (depends on 1) The display apparatus of claim 1, wherein the second dam is arranged to overlap the peripheral crack detection circuit. ### Claim 4 (depends on 1) The display apparatus of claim 1, wherein the peripheral crack detection circuit is arranged between the second dam and the end of the substrate. ### Claim 5 (depends on 1) The display apparatus of claim 1, further comprising a first insulating layer in the display area and the peripheral area, wherein the peripheral crack detection circuit is arranged over a first insulating layer in the peripheral area. ### Claim 6 (depends on 5) The display apparatus of claim 5, wherein the second dam comprises at least one slit in the first insulating layer, and a cladding covering the at least one slit. ### Claim 7 (depends on 5) The display apparatus of claim 5, further comprising a first barrier layer arranged between the substrate and the first insulating layer. ### Claim 8 (depends on 7) The display apparatus of claim 7, wherein the first barrier layer extends to the end of the substrate. ### Claim 9 (depends on 8) The display apparatus of claim 8, wherein the first inorganic layer in the encapsulation layer is in direct contact with the first barrier layer between the peripheral crack detection circuit and the end of the substrate. ### Claim 10 (depends on 8) The display apparatus of claim 8, wherein the first inorganic layer in the encapsulation layer is in direct contact with the first barrier layer between the second dam and the end of the substrate. ### Claim 11 (depends on 1) The display apparatus of claim 1, further comprising a first insulating layer in the display area and the peripheral area, wherein: at least one slit is arranged in the first insulating layer in the peripheral area; and the peripheral crack detection circuit is arranged in the at least one slit in the first insulating layer. ### Claim 12 (depends on 1) The display apparatus of claim 1, wherein the substrate comprises a flexible material. ### Claim 13 (depends on 12) The display apparatus of claim 12, wherein the substrate further comprises a first layer comprising an organic material, a second layer comprising an organic material, and a second barrier layer disposed between the first layer and the second layer. ### Claim 14 (depends on 1) The display apparatus of claim 1, further comprising: a thin-film transistor arranged on the substrate and comprising an active layer, a gate electrode, a source electrode, and a drain electrode; a first electrode connected to one of the source electrode and the drain electrode; a pixel-defining layer defining the first electrode; a second electrode facing the first electrode; and an intermediate layer arranged between the first electrode and the second electrode and comprising an organic light-emitting layer, wherein: the display apparatus further comprises a first insulating layer in the display area and the peripheral area, and the first insulating layer comprises at least one of insulating layers arranged between the active layer, the gate electrode, the source electrode, and the drain electrode in the thin-film transistor. ### Claim 15 (depends on 14) The display apparatus of claim 14, further comprising a passivation layer on the source electrode and the drain electrode, wherein the second dam comprises at least one slit in the first insulating layer, and a cladding covering the at least one slit, and wherein the cladding includes a same material as a material of the passivation layer. ### Claim 16 (depends on 15) The display apparatus of claim 15, wherein the first dam includes a same material as a material of at least one of the passivation layer and the pixel-defining layer. ### Claim 17 (depends on 16) The display apparatus of claim 16, wherein the first dam comprises a first dam arranged near the display area, and a first second dam arranged between the first dam and the peripheral crack detection circuit. ### Claim 18 (depends on 17) The display apparatus of claim 17, further comprising a spacer on the pixel-defining layer, wherein an uppermost portion of the first second dam includes a same material as a material of the spacer. ### Claim 19 A method of manufacturing a display apparatus by performing a cutting process with reference to a cutting line on a mother substrate to thereby split the mother substrate into a plurality of display apparatuses, the plurality of display apparatuses including a display area comprising a plurality of pixels and a peripheral area outside the display area, the method comprising: forming a first insulating layer on the mother substrate; forming a first dam on the first insulating layer to surround the display area, a peripheral crack detection circuit electrically connected to at least one of the plurality of pixels, and a second dam arranged between the first dam and the cutting line, each in the peripheral area of each of the plurality of display apparatuses; and forming an encapsulation layer comprising a first inorganic layer, an organic layer, and a second inorganic layer in the display area and the peripheral area, wherein: the first inorganic layer and the second inorganic layer are formed on the cutting line of the mother substrate to extend over a peripheral areas of a display apparatus adjacent to the first inorganic layer and the second inorganic layer, and then, the first inorganic layer and the second inorganic layer are cut with reference to the cutting line in a process of cutting the mother substrate; and the peripheral crack detection circuit comprises a plurality of crack detection wires arranged on a same layer. ### Claim 20 (depends on 19) The display apparatus of claim 19, wherein: the organic layer in the encapsulation layer is formed by using a first open mask comprising a plurality of first openings corresponding to the display area and a portion of the peripheral area of each of the display apparatuses; and the first inorganic layer and the second inorganic layer in the encapsulation layer are formed by using a second open mask comprising a second opening corresponding to the mother substrate to thereby connect a peripheral area of each of the plurality of display apparatuses to each other. ### Claim 21 (depends on 19) The display apparatus of claim 19, wherein the peripheral crack detection circuit and the second dam include a same material as a material of an insulating layer in the display area.