# US 9,040,833 B2 · Capacitive transparent conductive film and preparation method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,040,833 B2 - Document ID: US9040833B2 - Status: Granted - Kind: B2 - Application number: 14/000,200 - Filed: 2013-07-05 - Published: 2015-01-01 - Granted: 2015-05-26 - Earliest claimed: 2013-03-28 - Assignees: Nanchang O-Film Tech. Co., Ltd. - Applicants: Nanchang O-Film Tech. Co., Ltd. - Inventors: Yulong Gao; Ying Gu; Yunhua Zhao; Guanglong Xie - Web page: https://patentgrep.com/patent/US9040833B2 ## CPC - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 3/0443: {using a single layer of sensing electrodes} - H05K 1/0274: {Optical details, e.g. printed circuits comprising integral optical means (H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42)} - H05K 1/0298: {Multilayer circuits} - H05K 1/0353: {consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement} - H05K 1/09: Use of materials for the {conductive, e.g. } metallic pattern - H05K 3/02: in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding - G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices - H05K 2201/09036: Recesses or grooves in insulating substrate - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A capacitive transparent conductive film comprises: a transparent substrate, comprises a first surface and a second surface which is opposite to the first surface; a light-shield layer, formed at the edge of the first surface of the transparent substrate, the light-shield layer forms a non-visible region on the first surface of the transparent substrate; and a polymer layer, formed on the first surface of the transparent substrate, and covering the light-shield layer, the surface of the polymer layer is patterned to form a meshed trench, the trench is filled with conductive material to form a sensing region on the surface of the polymer layer. The capacitive transparent conductive film can effectively protect the conductive material and has low cost and good conductivity. A preparation method of the capacitive transparent conductive film is also provided. ## Claims ### Claim 1 A capacitive transparent conductive film, comprising: a transparent substrate comprising a first surface and a second surface opposite to the first surface; a light-shield layer formed at an edge of the first surface of the transparent substrate, the light-shield layer forming a non-visible region on the first surface of the transparent substrate; and a polymer layer formed on the first surface of the transparent substrate and covering the light-shield layer, a surface of the polymer layer being patterned to form a meshed trench, the trench being filled with a conductive material to form a sensing region on a surface of the polymer layer. ### Claim 2 (depends on 1) The capacitive transparent conductive film according to claim 1, wherein the non-visible region of the capacitive transparent conductive film has traces, conductive materials of the traces are electrically connected to the conductive material in the trench, and the traces are attached to the surface of the polymer layer. ### Claim 3 (depends on 2) The capacitive transparent conductive film according to claim 2, wherein conductive materials of the traces are directly connected to the conductive material in the trench. ### Claim 4 (depends on 2) The capacitive transparent conductive film according to claim 2, wherein the sensing region is provided with a line segment at an edge thereof electrically connected to the conductive material in the trench, the conductive materials of the traces are electrically connected to the conductive material in the trench by the line segment. ### Claim 5 (depends on 2) The capacitive transparent conductive film according to claim 2, wherein the traces are grid lines, the traces are electrically connected to the conductive material in the trench by a node. ### Claim 6 (depends on 2) The capacitive transparent conductive film according to claim 2, wherein the traces are formed on the non-visible region by screen printing or inkjet printing. ### Claim 7 (depends on 2) The capacitive transparent conductive film according to claim 2, wherein the traces are composed of patterned grids or line segments. ### Claim 8 (depends on 7) The capacitive transparent conductive film according to claim 7, wherein a line width of the patterned grid ranges from 2 μm to 50 μm, a height of the patterned grid ranges from 5 μm to 10 μm, length of the patterned grid is less than 100 μm. ### Claim 9 (depends on 7) The capacitive transparent conductive film according to claim 7, wherein a width of the line segment ranges from 50 μm to 200 μm, a height of the line segment ranges from 5 μm to 10 μm. ### Claim 10 (depends on 1) The capacitive transparent conductive film according to claim 1, wherein a width of the light-shield layer ranges from 1 mm to 5 mm. ### Claim 11 (depends on 1) The capacitive transparent conductive film according to claim 1, wherein a width of the trench ranges from 1 μm to 5 μm, a depth of the trench ranges from 2 μm to 6 μm, and a depth to width ratio of the trench is greater than 1. ### Claim 12 (depends on 1) The capacitive transparent conductive film according to claim 1, wherein the sensing region is a visible region, a light transmittance of the visible region is greater than 89%. ### Claim 13 (depends on 1) The capacitive transparent conductive film according to claim 1, wherein a cell of the grid is a regular polygon, a ratio of the area of each cell covered by a conductive material to a total area of each cell is less than 5%. ### Claim 14 (depends on 2) The capacitive transparent conductive film according to claim 2, further comprising a transparent protective layer, wherein the transparent protective layer covers the surface of the polymer layer except for output ends of the trace region. ### Claim 15 (depends on 1) The capacitive transparent conductive film according to claim 1, wherein the polymer layer is made of a material selected from a group consisting of UV curable adhesive, polyethylene terephthalate, polycarbonate, and polymethyl methacrylate. ### Claim 16 (depends on 1) The capacitive transparent conductive film according to claim 1, wherein the transparent substrate is a transparent glass plate. ### Claim 17 (depends on 1) The capacitive transparent conductive film according to claim 1, wherein the conductive material is selected from a group consisting of metal, indium tin oxide, transparent polymer materials, graphene, and carbon nanotubes. ### Claim 18 A method of preparating a capacitive transparent conductive film, comprising the following steps: forming the light-shield layer at an edge of the first surface of the transparent substrate to form the non-visible region; coating the first surface of the transparent substrate to form the polymer layer, patterning the polymer layer to form the trench, then filling the trench with a conductive material to form the sensing region; and printing the traces at an edge of the sensing region of the surface of the polymer layer, and electrically connecting the traces to the conductive material in the trench.