# US 10,768,727 B2 · Touch panel and fabricating method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,768,727 B2 - Document ID: US10768727B2 - Status: Granted - Kind: B2 - Application number: 15/206,316 - Filed: 2016-07-11 - Published: 2017-01-12 - Granted: 2020-09-08 - Earliest claimed: 2015-07-11 - Assignees: TPK Film Solutions (Xiamen) Inc. - Applicants: TPK Film Solutions (Xiamen) Inc. - Inventors: Liang-Yi Chang; Chien-Hung Kuan; Renqing Peng; Jiachun Li - Web page: https://patentgrep.com/patent/US10768727B2 ## CPC - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/044: by capacitive 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 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A touch panel includes a cover plate, a first adhesive component and a second adhesive component. The first adhesive component which is adhered underneath the cover plate, includes a plurality of first pattered sensing lines. The second adhesive component which is adhered underneath the first adhesive component, includes a plurality of second pattered sensing lines. The first pattered sensing lines and second pattered sensing lines are electrically insulated from each other. ## Claims ### Claim 1 A method of fabricating a touch panel, comprising: providing a cover plate; adhering a first adhesive component underneath the cover plate, comprising: removing a first release film from a first adhesive bearing layer to expose a first sticky surface of the first adhesive bearing layer; coating a first conducting layer on the first sticky surface of the first adhesive bearing layer; patterning the first conducting layer to form a plurality of first patterned sensing lines, wherein the patterning the first conducting layer comprises etching the first conducting layer; removing a second release film from the first adhesive bearing layer to expose a second sticky surface of the first adhesive bearing layer; and directly adhering the second sticky surface of the first adhesive bearing layer to the cover plate, and directly adhering a second adhesive component to the first adhesive component, comprising: removing a third release film from a second adhesive bearing layer to expose a first sticky surface of the second adhesive bearing layer and removing a fourth release film from the second adhesive bearing layer to expose a second sticky surface of the second adhesive bearing layer, coating a second conducting layer on the second sticky surface of the second adhesive bearing layer; patterning the second conducting layer to form a plurality of second patterned sensing lines, wherein: the patterning the second conducting layer comprises etching the second conducting layer, and the plurality of first patterned sensing lines are electrically insulated from the plurality of second patterned sensing lines; and directly adhering the first sticky surface of the second adhesive bearing layer to the first sticky surface of the first adhesive bearing layer. ### Claim 2 (depends on 1) The method of claim 1, wherein the etching the first conducting layer comprises performing at least one of laser etching, chemical etching, plasma etching, or photolithography. ### Claim 3 (depends on 1) The method of claim 1, wherein the etching the second conducting layer comprises performing at least one of laser etching, chemical etching, plasma etching, or photolithography. ### Claim 4 (depends on 1) The method of claim 1, wherein the directly adhering the second sticky surface of the first adhesive bearing layer to the cover plate comprises: directly adhering the second sticky surface of the first adhesive bearing layer to the cover plate after the patterning the first conducting layer. ### Claim 5 (depends on 1) The method of claim 1, wherein the first conducting layer comprises silver nanowires. ### Claim 6 (depends on 1) The method of claim 1, wherein the directly adhering the first sticky surface of the second adhesive bearing layer to the first sticky surface of the first adhesive bearing layer comprises: directly adhering the first sticky surface of the second adhesive bearing layer to the first sticky surface of the first adhesive bearing layer after the patterning the second conducting layer. ### Claim 7 (depends on 1) The method of claim 1, wherein a material of the cover plate comprises at least one of glass, polycarbonate (PC), polyethylene terephthalate (PET), polymethylmesacrylate (PMMA), poly vinyl chloride (PVC), polypropylene (PP), polystyrene (PS), polymethyl methacrylate (ASIA), polyethylene (PE), polysulfone (PSU), or a cyclic olefin copolymer (COC). ### Claim 8 (depends on 1) The method of claim 1, wherein a material of the first adhesive bearing layer comprises at least one of unsaturated polyester adhesive, silicone rubber adhesive, acrylic resin adhesive, polyurethane adhesive, or epoxy resin adhesive. ### Claim 9 (depends on 1) The method of claim 1, wherein the coating the first conducting layer comprises: coating the first conducting layer on the first sticky surface of the first adhesive bearing layer using at least one of sputtering, electroplating, printing, spin coating, or wet coating. ### Claim 10 (depends on 1) The method of claim 1, wherein the first conducting layer comprises metal nanostructure. ### Claim 11 (depends on 1) The method of claim 1, wherein a thickness of the first adhesive bearing layer is between 25 μm and 30 μm. ### Claim 12 (depends on 11) The method of claim 11, wherein a thickness of the second adhesive bearing layer is between 40 μm and 60 μm. ### Claim 13 (depends on 1) The method of claim 1, wherein a thickness of the second adhesive bearing layer is between 40 μm and 60 μm. ### Claim 14 (depends on 1) The method of claim 1, wherein a thickness of the first adhesive bearing layer is different than a thickness of the second adhesive bearing layer. ### Claim 15 A method of fabricating a touch panel, comprising: providing a cover plate; adhering a first adhesive component underneath the cover plate, comprising: coating a first conducting layer on a first sticky surface of a first adhesive bearing layer of the first adhesive component; patterning the first conducting layer to form a plurality of first patterned sensing lines; and directly adhering a second sticky surface of the first adhesive bearing layer to the cover plate, and directly adhering a second adhesive component to the first adhesive component, comprising: coating a second conducting layer on a first sticky surface of a second adhesive bearing layer of the second adhesive component; patterning the second conducting layer to form a plurality of second patterned sensing lines; and directly adhering a second sticky surface of the second adhesive bearing layer to the first sticky surface of the first adhesive bearing layer, wherein the plurality of first patterned sensing lines are electrically insulated from the plurality of second patterned sensing lines by the second adhesive bearing layer. ### Claim 16 (depends on 15) The method of claim 15, comprising: removing a first release film from the first adhesive bearing layer to expose the first sticky surface of the first adhesive bearing layer before the coating the first conducting layer on the first sticky surface of the first adhesive bearing layer, and removing a second release film from the first adhesive bearing layer to expose the second sticky surface of the first adhesive bearing layer before the directly adhering the second sticky surface of the first adhesive bearing layer to the cover plate. ### Claim 17 (depends on 15) The method of claim 15, comprising: removing a third release film from the second adhesive bearing layer to expose the first sticky surface of the second adhesive bearing layer before the coating the second conducting layer on the first sticky surface of the second adhesive bearing layer, and removing a fourth release film from the second adhesive bearing layer to expose the second sticky surface of the second adhesive bearing layer before the directly adhering the second sticky surface of the second adhesive bearing layer to the first sticky surface of the first adhesive bearing layer. ### Claim 18 (depends on 15) The method of claim 15, wherein a thickness of the first adhesive bearing layer is different than a thickness of the second adhesive bearing layer. ### Claim 19 (depends on 15) The method of claim 15, wherein the first conducting layer comprises metal nanostructure. ### Claim 20 A method of fabricating a touch panel, comprising: providing a cover plate; adhering a first adhesive component underneath the cover plate, comprising: removing a first release film from a first adhesive bearing layer to expose a first sticky surface of the first adhesive bearing layer; forming a plurality of first sensing lines on the first sticky surface of the first adhesive bearing layer; removing a second release film from the first adhesive bearing layer to expose a second sticky surface of the first adhesive bearing layer; and directly adhering the second sticky surface of the first adhesive bearing layer to the cover plate, and directly adhering a second adhesive component to the first adhesive component, comprising: removing a third release film from a second adhesive bearing layer to expose a first sticky surface of the second adhesive bearing layer and removing a fourth release film from the second adhesive bearing layer to expose a second sticky surface of the second adhesive bearing layer, form a plurality of second sensing lines on the second sticky surface of the second adhesive bearing layer; and directly adhering the first sticky surface of the second adhesive bearing layer to the first sticky surface of the first adhesive bearing layer, wherein the plurality of first sensing lines are electrically insulated from the plurality of second sensing lines by the second adhesive bearing layer.