# US 12,222,613 B2 · Manufacturing method of display panel and display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,222,613 B2 - Document ID: US12222613B2 - Status: Granted - Kind: B2 - Application number: 17/925,705 - Filed: 2022-04-01 - Published: 2024-07-04 - Granted: 2025-02-11 - Earliest claimed: 2022-03-21 - Assignees: Tcl China Star Optoelectronics Technology Co., Ltd. - Applicants: Tcl China Star Optoelectronics Technology Co., Ltd. - Inventors: Xiuhong Huang - Web page: https://patentgrep.com/patent/US12222613B2 ## CPC - G02F 1/13458: {Terminal pads} - G02F 1/133514: {Colour filters} - G02F 1/1339: Gaskets; Spacers; Sealing of cells - G02F 2201/50: Protective arrangements - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract The present application provides a manufacturing method of a display panel and the display panel. The manufacturing method of the display panel includes following steps: providing a display panel main body, the display panel main body including at least one metal pad located in an outer pin joint area, and a side of the at least one metal pad being exposed to an outside; forming a protective member covering the at least one metal pad on a side of the display panel main body; patterning the protective member to expose the at least one metal pad; forming a conductive layer on an exposed surface of the at least one metal pad; and forming a chip on film on a surface of the conductive layer away from the at least one metal pad. ## Claims ### Claim 1 A manufacturing method of a display panel, comprising following steps: providing a display panel main body, the display panel main body comprising at least one metal pad located in an outer pin joint area, and a side surface of the at least one metal pad being exposed to an outside; forming a protective member covering the side surface of the at least one metal pad on a side surface of the display panel main body; patterning the protective member to expose the side surface of the at least one metal pad; forming a conductive layer on an exposed surface of the at least one metal pad; and forming a chip on film on a surface of the conductive layer away from the at least one metal pad, wherein the protective member comprises an adhesive layer and a protective film, the adhesive layer is attached between the side surface of the display panel main body and the protective film, and the adhesive layer covers the side surface of the at least one metal pad, and wherein a release film is attached to a side of the adhesive layer away from the protective film before forming the protective member, wherein forming the protective member covering the side surface of the at least one metal pad on the side surface of the display panel main body comprising: tearing off the release film and attaching the protective member to the side surface of the display panel main body. ### Claim 2 (depends on 1) The manufacturing method of the display panel according to claim 1, wherein a material of the protective film comprises one or more of a polyethylene terephthalate, a polystyrene, a polycarbonate, a polyvinyl chloride, and a phthalaldehyde. ### Claim 3 (depends on 1) The manufacturing method of the display panel according to claim 1, wherein the step of forming the protective member covering the side surface of the at least one metal pad on the side surface of the display panel main body comprises forming an adhesive protective member by using a coating process, and a material of the protective member is a peelable coating. ### Claim 4 (depends on 3) The manufacturing method of the display panel according to claim 3, wherein the peelable coating comprises one or more of an acrylic resin, a polyurethane, and an epoxy resin. ### Claim 5 (depends on 1) The manufacturing method of the display panel according to claim 1, wherein after the step of patterning the protective member, an opening exposing the side surface of the at least one metal pad is formed on the protective member; and the step of forming the conductive layer on the exposed surface of the at least one metal pad comprises: filling the opening with a conductive material; and curing the conductive material to form the conductive layer, and a thickness of the conductive layer being less than or equal to a thickness of the protective member. ### Claim 6 (depends on 5) The manufacturing method of the display panel according to claim 5, wherein the display panel main body comprises an array substrate and a color film substrate disposed opposite to each other, and a frame glue disposed between the array substrate and the color film substrate; the frame glue is located between the at least one metal pad and the color film substrate, and the frame glue, a part of the array substrate, and a part of the color film substrate are exposed from the opening. ### Claim 7 (depends on 6) The manufacturing method of the display panel according to claim 6, wherein in a direction from the array substrate to the color film substrate, an opening length of the opening ranges from one quarter to one half of a length of the protective member. ### Claim 8 (depends on 5) The manufacturing method of the display panel according to claim 5, wherein the conductive material is a silver paste. ### Claim 9 (depends on 8) The manufacturing method of the display panel according to claim 8, wherein the at least one metal pad is a copper pad. ### Claim 10 (depends on 1) The manufacturing method of the display panel according to claim 1, wherein after the step of patterning the protective member and before the step of forming the conductive layer on the exposed surface of the at least one metal pad, the manufacturing method further comprises cleaning an exposed part of the at least one metal pad. ### Claim 11 (depends on 1) The manufacturing method of the display panel according to claim 1, wherein after the step of forming the conductive layer on the exposed surface of the at least one metal pad and before the step of forming the chip on film on the surface of the conductive layer away from the at least one metal pad, the manufacturing method further comprises removing the protective member after being patterned. ### Claim 12 (depends on 1) The manufacturing method of the display panel according to claim 1, wherein the step of patterning the protective member comprises patterning the protective member by using a laser cutting process to form an opening exposing the side surface of the at least one metal pad on the protective member. ### Claim 13 (depends on 12) The manufacturing method of the display panel according to claim 12, wherein an opening area of the opening is greater than an area of the exposed surface of the at least one metal pad. ### Claim 14 (depends on 13) The manufacturing method of the display panel according to claim 13, wherein the display panel main body comprises an array substrate and a color film substrate disposed opposite to each other, and a frame glue disposed between the array substrate and the color film substrate, and the frame glue is located between the at least one metal pad and the color film substrate; and in a direction parallel to a plane the array substrate is located, an opening width of the opening is equal to a width of the at least one metal pad; and in a direction from the array substrate to the color film substrate, an opening length of the opening is greater than a length of the at least one metal pad. ### Claim 15 (depends on 1) The manufacturing method of the display panel according to claim 1, wherein the step of forming the chip on film on the surface of the conductive layer away from the at least one metal pad comprises: forming an anisotropic conductive adhesive layer on a side of the conductive layer away from the at least one metal pad; and attaching and bonding the chip on film to a surface of the anisotropic conductive adhesive layer. ### Claim 16 (depends on 1) A display panel, wherein the display panel is prepared by the manufacturing method of the display panel according to claim 1.