# US 11,029,791 B2 · Touch panel including a layered structure with first and second mesh terminal layers directly overlaid on each other and touch panel production method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,791 B2 - Document ID: US11029791B2 - Status: Granted - Kind: B2 - Application number: 16/170,526 - Filed: 2018-10-25 - Published: 2019-05-02 - Granted: 2021-06-08 - Earliest claimed: 2017-10-31 - Assignees: Japan Aviation Electronics Industry, Limited - Applicants: Japan Aviation Electronics Industry, Limited - Inventors: Akitoshi Sakaue - Web page: https://patentgrep.com/patent/US11029791B2 ## CPC - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - B41M 3/006: {Patterns of chemical products used for a specific purpose, e.g. pesticides, perfumes, adhesive patterns; use of microencapsulated material; Printing on smoking articles} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - H05K 3/1275: {by other printing techniques, e.g. letterpress printing, intaglio printing, lithographic printing, offset printing} - B41P 2200/13: Offset printing - 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 - H05K 2203/0534: Offset printing, i.e. transfer of a pattern from a carrier onto the substrate by using an intermediate member - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - B41P: INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS ## Abstract A touch panel comprises, a substrate, a layered structure formed in a sensing region defined on one side of the substrate, the layered structure including at least a first conductor layer made of a first hardened conductive ink, a second conductor layer made of a second hardened conductive ink and an insulating layer disposed therebetween, and an external connection terminal formed outside the sensing region on the one side of the substrate, wherein the external connection terminal comprises a first terminal layer made of the first hardened conductive ink and a second terminal layer made of the second hardened conductive ink, such that the first terminal layer and the second terminal layer are directly overlaid on each other. ## Claims ### Claim 1 A touch panel comprising: a substrate; a layered structure formed in a sensing region defined on one side of the substrate, the layered structure including at least a first conductor layer made of a first hardened conductive ink, a second conductor layer made of a second hardened conductive ink and an insulating layer disposed therebetween; and an external connection terminal formed outside the sensing region on the one side of the substrate; wherein the external connection terminal comprises a first terminal layer made of the first hardened conductive ink and a second terminal layer made of the second hardened conductive ink, such that the first terminal layer and the second terminal layer are directly overlaid on each other at a most terminal end of a conductive path of the touch panel; wherein the first terminal layer forms a first mesh of fine lines and the second terminal layer forms a second mesh of fine lines; wherein each of the first mesh of fine lines and the second mesh of fine lines has a grid pattern having a pair of periodicity directions and a pair of grid periods corresponding thereto, such that the first mesh of fine lines and the second mesh of fine lines are identical to each other in terms of the pair of periodicity directions and the pair of grid periods; and the first mesh of fine lines and the second mesh of fine lines are overlaid on each other in such a way that the first mesh of fine lines and the second mesh of fine lines are deviated from each other in both of the pair of periodicity directions, respectively by from ¼ to ¾, inclusive, of the grid period corresponding to the periodicity direction. ### Claim 2 (depends on 1) The touch panel according to claim 1, further comprising an anisotropic conductive film connected to the external connection terminal; wherein the pair of grid periods are equal to each other; and the anisotropic conductive film contains a plurality of conductive particles each having a diameter greater than or equal to ½ of the grid period; whereby the external connection terminal may be connected to an electrode of an external circuit through the anisotropic conductive film. ### Claim 3 (depends on 1) The touch panel according to claim 1, wherein each of the first conductor layer and the second conductor layer forms a mesh of fine lines. ### Claim 4 (depends on 2) The touch panel according to claim 2, wherein each of the first conductor layer and the second conductor layer forms a mesh of fine lines. ### Claim 5 (depends on 1) A touch panel production method for producing the touch panel according to claim 1, the method comprising: simultaneously printing the first conductor layer and the first terminal layer on the one side of the substrate by using a first conductive ink; printing the insulating layer by using an insulating ink; and simultaneously printing the second conductor layer and the second terminal layer by using a second conductive ink. ### Claim 6 (depends on 2) A touch panel production method for producing the touch panel according to claim 2, the method comprising: simultaneously printing the first conductor layer and the first terminal layer on the one side of the substrate by using a first conductive ink; printing the insulating layer by using an insulating ink; and simultaneously printing the second conductor layer and the second terminal layer by using a second conductive ink. ### Claim 7 (depends on 3) A touch panel production method for producing the touch panel according to claim 3, the method comprising: simultaneously printing the first conductor layer and the first terminal layer on the one side of the substrate by using a first conductive ink; printing the insulating layer by using an insulating ink; and simultaneously printing the second conductor layer and the second terminal layer by using a second conductive ink. ### Claim 8 (depends on 4) A touch panel production method for producing the touch panel according to claim 4, the method comprising: simultaneously printing the first conductor layer and the first terminal layer on the one side of the substrate by using a first conductive ink; printing the insulating layer by using an insulating ink; and simultaneously printing the second conductor layer and the second terminal layer by using a second conductive ink. ### Claim 9 (depends on 5) The touch panel production method according to claim 5, wherein the simultaneously printing the first conductor layer and the first terminal layer on the one side of the substrate by using the first conductive ink is a gravure offset printing process using a first blanket; and the simultaneously printing the second conductor layer and the second terminal layer by using the second conductive ink is a gravure offset printing process using a second blanket. ### Claim 10 (depends on 6) The touch panel production method according to claim 6, wherein the simultaneously printing the first conductor layer and the first terminal layer on the one side of the substrate by using the first conductive ink is a gravure offset printing process using a first blanket; and the simultaneously printing the second conductor layer and the second terminal layer by using the second conductive ink is a gravure offset printing process using a second blanket. ### Claim 11 (depends on 7) The touch panel production method according to claim 7, wherein the simultaneously printing the first conductor layer and the first terminal layer on the one side of the substrate by using the first conductive ink is a gravure offset printing process using a first blanket; and the simultaneously printing the second conductor layer and the second terminal layer by using the second conductive ink is a gravure offset process printing using a second blanket. ### Claim 12 (depends on 8) The touch panel production method according to claim 8, wherein the simultaneously printing the first conductor layer and the first terminal layer on the one side of the substrate by using the first conductive ink is a gravure offset printing process using a first blanket; and the simultaneously printing the second conductor layer and the second terminal layer by using the second conductive ink is a gravure offset printing process using a second blanket.