# US 11,910,522 B2 · Flexible circuit board, method for manufacturing flexible circuit board and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,522 B2 - Document ID: US11910522B2 - Status: Granted - Kind: B2 - Application number: 17/523,495 - Filed: 2021-11-10 - Published: 2022-08-25 - Granted: 2024-02-20 - Earliest claimed: 2021-02-25 - Assignees: Beijing Boe Display Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Beijing BOE Display Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Tingting Wang; Qi Wang; Yan Yan - Web page: https://patentgrep.com/patent/US11910522B2 ## CPC - H05K 1/0213: {Electrical arrangements not otherwise provided for} - H05K 1/0256: {Electrical insulation details, e.g. around high voltage areas} - H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)} - H05K 1/09: Use of materials for the {conductive, e.g. } metallic pattern - H05K 1/189: characterised by the use of flexible or folded printed circuits - H05K 2201/0769: Anti metal-migration, e.g. avoiding tin whisker growth - H05K 2201/10128: Display - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A flexible circuit board, a method for manufacturing the flexible circuit board, and a display device are provided. The flexible circuit board includes: a plurality of driving signal lines arranged with mutually insulate-gates, wherein the driving signal lines comprise at least two voltage signal lines arranged adjacent to each other; at least one isolation protecting line, the isolation protecting line being located between the two voltage signal lines arranged adjacent to each other. ## Claims ### Claim 1 A flexible circuit board, comprising: a plurality of driving signal lines arranged with mutually insulate-gates, wherein the driving signal lines comprise at least two voltage signal lines arranged adjacent to each other; and at least one isolation protecting line located between two voltage signal lines among the at least two voltage signal lines arranged adjacent to each other and configured such that when the flexible circuit board is powered on, an isolation protecting line among the at least one isolation protecting line is not electrically connected or the isolation protecting line is grounded; and a structure of each voltage signal line is same as that of the isolation protecting line; wherein the voltage signal line comprises: a conductive layer and a flat layer; an insulating layer arranged between the conductive layer and the flat layer; and an electrode layer arranged at a side of the flat layer distal to the conductive layer. ### Claim 2 (depends on 1) The flexible circuit board according to claim 1, wherein no voltage signal is inputted into the isolation protecting line. ### Claim 3 (depends on 1) The flexible circuit board according to claim 1, wherein a material of the conductive layer comprises MoNbCu, a material of the insulating layer comprises SiNx, a material of the flat layer comprises SiNx, and a material of the electrode layer comprises In2O3SnO2. ### Claim 4 (depends on 1) The flexible circuit board according to claim 1, wherein the isolation protecting line comprises: a conductive layer and a flat layer; an insulating layer arranged between the conductive layer and the flat layer; and an electrode layer arranged at a side of the flat layer distal to the conductive layer. ### Claim 5 (depends on 4) The flexible circuit board according to claim 4, wherein a material of the conductive layer comprises MoNbCu, a material of the insulating layer comprises SiNx, a material of the flat layer comprises SiNx, and a material of the electrode layer comprises In2O3SnO2. ### Claim 6 (depends on 1) The flexible circuit board according to claim 1, wherein the voltage signal line comprises at least two voltage signal pins; and the isolation protecting line comprises at least one isolation protecting pin. ### Claim 7 (depends on 6) The flexible circuit board according to claim 6, wherein the isolation protecting pin is configured such that when the flexible circuit board is electrically connected to an external power source, the isolation protecting pin is not electrically connected or the isolation protecting pin is grounded. ### Claim 8 A method for manufacturing the flexible circuit board, comprising: forming a plurality of driving signal lines arranged with mutually insulate-gates, wherein the driving signal lines comprise at least two voltage signal lines arranged adjacent to each other; forming an isolation protecting line between two voltage signal lines among the at least two voltage signal lines arranged adjacent to each other, wherein the isolation protecting line is configured such that when the flexible circuit board is powered on, the isolation protecting line is not electrically connected or the isolation protecting line is grounded; each voltage signal line comprises at least two voltage signal pins; the isolation protecting line comprises at least one isolation protecting pin; and the at least two voltage signal pins are formed in a same layer as the at least one isolation protecting pin; wherein the voltage signal line comprises: a conductive layer and a flat layer; an insulating layer arranged between the conductive layer and the flat layer; and an electrode layer arranged at a side of the flat layer distal to the conductive layer. ### Claim 9 A display device comprising a display panel and a flexible circuit board, wherein the flexible circuit board comprises: a plurality of driving signal lines arranged with mutually insulate-gates, wherein the driving signal lines comprise at least two voltage signal lines arranged adjacent to each other; and at least one isolation protecting line located between two voltage signal lines among the at least two voltage signal lines arranged adjacent to each other and configured such that when the flexible circuit board is powered on, an isolation protecting line among the at least one isolation protecting line is not electrically connected or the isolation protecting line is grounded; and a structure of each voltage signal line is same as that of the isolation protecting line; wherein the voltage signal line comprises: a conductive layer and a flat layer; an insulating layer arranged between the conductive layer and the flat layer; and an electrode layer arranged at a side of the flat layer distal to the conductive layer. ### Claim 10 (depends on 9) The display device according to claim 9, wherein no voltage signal is inputted into the isolation protecting line. ### Claim 11 (depends on 9) The display device according to claim 9, wherein a material of the conductive layer comprises MoNbCu, a material of the insulating layer comprises SiNx, a material of the flat layer comprises SiNx, and a material of the electrode layer comprises In2O3SnO2. ### Claim 12 (depends on 9) The display device according to claim 9, wherein the isolation protecting line comprises: a conductive layer and a flat layer; an insulating layer arranged between the conductive layer and the flat layer; and an electrode layer arranged at a side of the flat layer distal to the conductive layer. ### Claim 13 (depends on 12) The display device according to claim 12, wherein a material of the conductive layer comprises MoNbCu, a material of the insulating layer comprises SiNx, a material of the flat layer comprises SiNx, and a material of the electrode layer comprises In2O3SnO2. ### Claim 14 (depends on 9) The display device according to claim 9, wherein the voltage signal line comprises at least two voltage signal pins; the isolation protecting line comprises at least one isolation protecting pin.