# US 2020/0403189 A1 · Display panel 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 2020/0403189 A1 - Document ID: US20200403189A1 - Status: Published application - Kind: A1 - Application number: 16/855,645 - Filed: 2020-04-22 - Published: 2020-12-24 - Earliest claimed: 2019-06-19 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Younghoon LEE; Youngji KIM; Yiseul UM; Wonje JO; Young Seo CHOI; Dongwon HAN - Web page: https://patentgrep.com/patent/US20200403189A1 ## CPC - H10K 77/10: Substrates, e.g. flexible substrates - H10K 59/1201: {Manufacture or treatment} - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K 71/80: using temporary substrates - H05B 33/10: Apparatus or processes specially adapted to the manufacture of electroluminescent light sources - H10K 59/12: Active-matrix OLED [AMOLED] displays - H10K 71/851: {Division of substrate} - 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 - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - 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 method of manufacturing a display panel includes preparing a work substrate that includes a mother substrate that has a plurality of cell areas, a light emitting element layer formed in each of the cell areas, and an encapsulation layer formed on each cell area, disposing a plurality of protective films in the cell areas, respectively, that cover the light emitting element layer and the encapsulation layer, cutting the work substrate along cutting lines at an outer side of the protective films of each cell area to form a preliminary display panel, grinding side surfaces of the preliminary display panel, and removing the protective films from each ground preliminary display panel to form the display panel. ## Claims ### Claim 1 A method of manufacturing a display panel, comprising: preparing a work substrate that includes a mother substrate that includes a plurality of cell areas, a light emitting element layer formed in each of the cell areas, and an encapsulation layer formed on each light emitting area in each cell area; disposing a plurality of protective films in the cell areas, respectively, that cover the light emitting element layer and the encapsulation layer; cutting the work substrate along cutting lines at an outer side of the protective films of at least one cell area wherein a at least one preliminary display panel is formed; grinding side surfaces of the at least one preliminary display panel; and removing the protective film from the at least one ground preliminary display panel wherein at least one display panel is formed. ### Claim 2 (depends on 1) The method of claim 1, wherein the cutting lines are formed along each of the cell areas in the work substrate, and the protective films do not overlap the cutting lines. ### Claim 3 (depends on 1) The method of claim 1, wherein the encapsulation layer includes one or more inorganic layers alternately stacked with one or more organic layers. ### Claim 4 (depends on 1) The method of claim 1, wherein cutting the work substrate along the cutting lines comprises: disposing a cutting device on a first surface of the work substrate on which the light emitting element layer and the encapsulation layer are disposed; and moving the cutting device along the cutting line to cut the work substrate. ### Claim 5 (depends on 1) The method of claim 1, wherein grinding side surfaces of the at least one preliminary display panel comprises: grinding a straight-line-shaped portion of the side surfaces wherein the straight-line-shaped portion has a straight line shape; and grinding a curved surface-shaped portion of the side surfaces wherein the curved-surface-shaped portion has a curved shape. ### Claim 6 (depends on 5) The method of claim 5, wherein grinding the straight-line-shaped portion comprises one or more of grinding a front surface edge or a rear surface edge of the straight-line-shaped portion using an edge grinder. ### Claim 7 (depends on 5) The method of claim 5, wherein, when the grinding of the straight-line-shaped portion comprises grinding the rear surface edge of the straight-line-shaped portion, the grinding of the straight-fine-shaped portion further comprises turning the at least one preliminary display panel upside down before grinding the rear surface edge. ### Claim 8 (depends on 5) The method of claim 5, wherein grinding the straight-line-shaped portion comprises substantially simultaneously grinding a front surface edge and a rear surface edge of the straight-line-shaped portion using a computer numerical control grinding device. ### Claim 9 (depends on 5) The method of claim 5, wherein grinding the curved-surface-shaped portion comprises substantially simultaneously grinding a front surface edge and a rear surface edge of the curved-surface-shaped portion using a computer numerical control grinding device. ### Claim 10 (depends on 9) The method of claim 9, wherein, when the straight-line-shaped portion is ground using the computer numerical control grinding device, the straight-line-shaped portion is ground through a same process as the curved-surface-shaped portion. ### Claim 11 (depends on 5) The method of claim 5, wherein grinding the side surfaces of the at least one preliminary display panel further comprises grinding a pad portion of the side surfaces that is adjacent to a pad area in which a plurality of pads is disposed. ### Claim 12 (depends on 11) The method of claim 11, wherein grinding the pad portion comprises: turning the at least one preliminary display panel upside down; and grinding a rear surface edge of the pad portion using an edge grinder. ### Claim 13 (depends on 5) The method of claim 5, wherein, when the straight-line-shaped portion is ground using an edge grinder, the pad portion is ground through a same process as the straight-line-shaped portion. ### Claim 14 A display panel, comprising: a base substrate; a light emitting element layer disposed on one surface of the base substrate; and an encapsulation layer that covers the light emitting element layer, wherein an edge of the base substrate includes: a straight-line-shaped portion that has a straight line shape; and a shape processing portion that includes at least one curved-surface-shaped portion that has a curved shape, wherein the at least one curved-surface-shaped portion includes: a first curved-line grind surface formed in a front surface edge of the base substrate; and a second curved-line grind surface formed in a rear surface edge of the base substrate. ### Claim 15 (depends on 14) The display panel of claim 14, wherein the straight-line-shaped portion includes a straight-line grind surface formed in at least one of the front surface edge and the rear surface edge of the base substrate, and the straight-line grind surface has a width that is equal to or less than that of the first and second curved-line grind surface of the shape processing portion. ### Claim 16 (depends on 14) The display panel of claim 14, further comprising, a plurality of pads disposed on the base substrate, wherein the edge of the base substrate further includes a pad portion adjacent to the plurality of pads, and the pad portion comprises a pad grinding surface formed in the rear surface edge of the base substrate. ### Claim 17 (depends on 16) The display panel of claim 16, wherein the pad grinding surface has a width that is less than that of the first and second curved-line grind surfaces of the shape processing portion. ### Claim 18 A method of manufacturing a display panel, comprising: providing a plurality of preliminary display panels, wherein each preliminary display panel comprises a cell area and a protective film that covers the cell area, wherein each preliminary display panel includes side surfaces; grinding a straight-line-shaped portion of the side surfaces wherein the straight-line-shaped portion has a straight line shape; grinding a curved-surface-shaped portion of the side surfaces wherein the curved-surface-shaped portion has a curved shape; grinding a pad portion of the side surfaces that is adjacent to a pad area in which a plurality of pads is disposed; and removing the protective films from each ground preliminary display panel wherein a plurality of display panels are formed. ### Claim 19 (depends on 18) The method of claim 18, wherein providing the plurality of preliminary display panels comprises: preparing a work substrate that includes a mother substrate that includes a plurality of the cell areas, a light emitting element layer formed in each of the cell areas, and an encapsulation layer formed on each light emitting area in each cell area; disposing a plurality of the protective films in the cell areas, respectively, that cover the light emitting element layer and the encapsulation layer; and cutting the work substrate along cutting lines at an outer side of the protective films of each cell area wherein a plurality of the preliminary display panels are formed. ### Claim 20 (depends on 18) The method of claim 18, wherein grinding the straight-line-shaped portion comprises one or more of grinding a front surface edge of the straight-line-shaped portion using one of an edge grinder or a computer numerical control grinding device, and grinding a rear surface edge of the straight-line-shaped portion using one of the edge grinder and the computer numerical control grinding device. wherein grinding the curved-surface-shaped portion comprises substantially simultaneously grinding a front surface edge and a rear surface edge of the curved-surface-shaped portion using the computer numerical control grinding device, and wherein grinding the pad portion comprises turning each preliminary display panel upside down; and grinding a rear surface edge of the pad portion using the edge grinder.