# US 2023/0409150 A1 · Touch panel conductive member and method for producing touch panel conductive member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0409150 A1 - Document ID: US20230409150A1 - Status: Published application - Kind: A1 - Application number: 18/461,203 - Filed: 2023-09-05 - Published: 2023-12-21 - Earliest claimed: 2021-03-11 - Assignees: FUJIFILM Corporation - Applicants: FUJIFILM Corporation - Inventors: Shinya KATO - Web page: https://patentgrep.com/patent/US20230409150A1 ## CPC - G06F 3/044: by capacitive means - G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices - G06F 2203/04112: Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Provided are a touch panel conductive member intended to achieve both the reduction in electrical resistance of metal thin wires and bendability, and a method for producing same. The touch panel conductive member includes a transparent insulating substrate, an undercoat layer disposed thereon, first metal thin wires disposed on the undercoat layer, and a transparent insulating layer covering the first metal thin wires. The first metal thin wires have a thickness of 350 to 1000 nm. When a sectional image of the touch panel conductive member in a direction orthogonal to a direction in which the first metal thin wires extend is taken at ten positions and one of the first metal thin wires is observed at each of the ten positions, a void between a side surface of the one of the first metal thin wires and the transparent insulating layer is observed at six or more positions. ## Claims ### Claim 1 A touch panel conductive member comprising: a transparent insulating substrate; an undercoat layer disposed on the transparent insulating substrate; first metal thin wires disposed on the undercoat layer; and a transparent insulating layer covering the first metal thin wires, wherein the first metal thin wires have a thickness of 350 to 1000 nm, and when a sectional image of the touch panel conductive member in a direction orthogonal to a direction in which the first metal thin wires extend is taken at ten positions and one of the first metal thin wires is observed at each of the ten positions, a void between a side surface of the one of the first metal thin wires and the transparent insulating layer is observed at six or more positions. ### Claim 2 (depends on 1) The touch panel conductive member according to claim 1, wherein the first metal thin wires constitute a mesh pattern, and have a width of 1.5 to 4.0 μm. ### Claim 3 (depends on 1) The touch panel conductive member according to claim 1, wherein second metal thin wires are further disposed on the transparent insulating layer, and the transparent insulating layer has a thickness of 1.0 to 5.0 μm. ### Claim 4 (depends on 3) The touch panel conductive member according to claim 3, wherein the second metal thin wires constitute a mesh pattern, and have a width of 1.5 to 4.0 μm. ### Claim 5 (depends on 1) The touch panel conductive member according to claim 1, wherein the first metal thin wires are formed of copper. ### Claim 6 (depends on 3) The touch panel conductive member according to claim 3, wherein the second metal thin wires are formed of copper. ### Claim 7 (depends on 1) The touch panel conductive member according to claim 1, wherein the transparent insulating substrate is a substrate including a polyester resin, and has a thickness of 10 to 60 μm. ### Claim 8 A method for producing a touch panel conductive member, comprising: a first step of forming an undercoat layer on a transparent insulating substrate; a second step of forming first metal thin wires on the undercoat layer; and a third step of forming a transparent insulating layer covering the first metal thin wires, wherein the first metal thin wires have a thickness of 350 to 1000 nm, and the undercoat layer includes a surfactant containing at least one of a fluorine atom or a silicon atom, and a content of the surfactant is 0.01 to 5 mass % relative to a total mass of the undercoat layer. ### Claim 9 (depends on 8) The method for producing a touch panel conductive member according to claim 8, wherein the third step is a step of applying a transparent insulating layer-forming composition onto the first metal thin wires to form the transparent insulating layer. ### Claim 10 (depends on 8) The method for producing a touch panel conductive member according to claim 8, wherein the second step includes a step of forming the first metal thin wires in a mesh pattern. ### Claim 11 (depends on 8) The method for producing a touch panel conductive member according to claim 8, the method further comprising: a fourth step of forming second metal thin wires on the transparent insulating layer. ### Claim 12 (depends on 11) The method for producing a touch panel conductive member according to claim 11, wherein the fourth step includes a step of forming the second metal thin wires in a mesh pattern. ### Claim 13 (depends on 8) The method for producing a touch panel conductive member according to claim 8, wherein the first metal thin wires are formed of copper. ### Claim 14 (depends on 11) The method for producing a touch panel conductive member according to claim 11, wherein the second metal thin wires are formed of copper. ### Claim 15 (depends on 2) The touch panel conductive member according to claim 2, wherein second metal thin wires are further disposed on the transparent insulating layer, and the transparent insulating layer has a thickness of 1.0 to 5.0 μm. ### Claim 16 (depends on 15) The touch panel conductive member according to claim 15, wherein the second metal thin wires constitute a mesh pattern, and have a width of 1.5 to 4.0 μm. ### Claim 17 (depends on 2) The touch panel conductive member according to claim 2, wherein the first metal thin wires are formed of copper. ### Claim 18 (depends on 4) The touch panel conductive member according to claim 4, wherein the second metal thin wires are formed of copper. ### Claim 19 (depends on 2) The touch panel conductive member according to claim 2, wherein the transparent insulating substrate is a substrate including a polyester resin, and has a thickness of 10 to 60 μm. ### Claim 20 (depends on 9) The method for producing a touch panel conductive member according to claim 9, wherein the second step includes a step of forming the first metal thin wires in a mesh pattern.