CN108958561B - Touch panel and manufacturing method thereof - Google Patents
Touch panel and manufacturing method thereof Download PDFInfo
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- CN108958561B CN108958561B CN201810703167.2A CN201810703167A CN108958561B CN 108958561 B CN108958561 B CN 108958561B CN 201810703167 A CN201810703167 A CN 201810703167A CN 108958561 B CN108958561 B CN 108958561B
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- area
- etching line
- virtual wiring
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- functional area
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Abstract
The invention provides a touch panel and a manufacturing method thereof.A conductive layer is arranged on a substrate, and an OCA optical adhesive layer is arranged on the conductive layer; the conducting layer is made of silver-containing materials and comprises a virtual wiring area and a functional area, and a specific graph is arranged at the joint of the virtual wiring area and the functional area to electrically insulate the virtual wiring area from the functional area. According to the invention, the specific pattern is arranged at the joint of the virtual wiring area and the functional area, so that the distance between the virtual wiring area and the functional area is correspondingly increased, and the risk of silver migration of a nano silver layer is effectively reduced. Furthermore, the filling etching lines are arranged in the functional area, so that the visual difference between the functional area and the virtual wiring area is weakened, and the visual effect of weakening the etching marks is further achieved.
Description
Technical Field
The invention relates to the technical field of touch control, in particular to a touch panel and a manufacturing method thereof.
Background
Touch panels (Touch panels) are increasingly used in the display technology fields of tourist guide systems, automatic teller machines, portable electronic products, industrial control systems, etc. due to their convenient usage. The touch panel with the highest utilization rate is mainly a resistive touch panel and a capacitive touch panel, but users mostly select the capacitive touch panel as the best preferred device for the consideration of controllability, usability and surface appearance.
In a capacitive touch panel of a conventional smart phone, a material of a touch electrode is typically Indium Tin Oxide (ITO). The ITO has the characteristics of high light transmittance and good conductivity, but the surface resistance of the ITO is overlarge and the manufacturing cost is high. As a new material, a nano metal wire represented by a nano silver wire (SNW) is beginning to replace ITO. The nano silver wire has excellent conductivity of silver, and has excellent light transmittance and bending resistance due to the size effect of nano level, so that the nano silver wire can be used as a material for preferably replacing ITO as a touch electrode.
However, in the prior art, the silver nanowire conductive layer generally needs to be etched to be in a grid pattern shape, and in order to avoid clear etching traces as much as possible, the GAP (GAP) value of the pattern in the silver nanowire conductive layer is smaller and smaller. In some wet environments with a direct current voltage gradient, water molecules can penetrate into the nano silver wire conducting layer to generate electrolysis, water is electrolyzed into hydrogen ions and hydroxyl ions, at the moment, silver in the nano silver wire conducting layer can be dissociated under the action of an electric field and the hydroxyl ions to generate silver ions, so that under the action of the electric field, the silver ions can migrate from a high potential to a low potential and form flocculent or dendritic expansion, and further form black silver oxide 10 on a boundary connecting the high potential and the low potential, as shown in fig. 1. That is, the migration of silver ions causes a bypass between the conductors without electrical connection, resulting in insulation degradation and even short circuit problems.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a touch panel and a method for manufacturing the same.
The invention provides a touch panel, comprising:
a substrate;
the conducting layer is arranged on the surface of the substrate and is made of a silver-containing conducting material; the conducting layer comprises a virtual wiring area and a functional area, and specific patterns are arranged at the joint of the virtual wiring area and the functional area, so that the virtual wiring area is electrically insulated from the functional area;
an OCA optics glue film, OCA optics glue film covers the conducting layer.
Preferably, the specific figure is a bow shape.
Preferably, a separation etching line is arranged in the virtual wiring area, and the separation etching line separates the virtual wiring area into a plurality of independent floating blocks.
Preferably, a filling etching line is arranged in the functional region, and the filling etching line is matched with the separation etching line.
Preferably, the filling etching line and the separation etching line have the same line width and line interval.
Preferably, the touch panel further includes: and the adhesion promoting layer and the routing layer are arranged on the surface of the conductive layer.
Preferably, the silver-containing conductive material is a nano silver wire.
Further, the present invention provides a method for manufacturing a touch panel, including:
providing a substrate;
forming a conductive layer on the substrate, wherein the conductive layer is made of a silver-containing conductive material; the conducting layer comprises a virtual wiring area and a functional area, and a specific graph is arranged at the joint of the virtual wiring area and the functional area, so that the virtual wiring area is not electrically connected with the functional area;
and forming an OCA optical adhesive layer, wherein the OCA optical adhesive layer covers the conductive layer.
Preferably, an isolation etching line is arranged in the virtual wiring area, a filling etching line is arranged in the functional area, and the filling etching line and the isolation etching line are matched with each other.
Preferably, the filling etch line is formed simultaneously with the separation etch line.
In summary, in the touch panel provided by the present invention, the conductive layer is disposed on the substrate, and the OCA optical adhesive layer is disposed on the conductive layer; the conducting layer is made of silver-containing materials and comprises a virtual wiring area and a functional area, and a specific graph is arranged at the joint of the virtual wiring area and the functional area, so that the distance between the virtual wiring area and the functional area is correspondingly increased, the electrical insulation between the virtual wiring area and the functional area is further enhanced, and the risk of silver migration of a nano-silver layer is effectively reduced.
Furthermore, the filling etching lines are arranged in the functional area, so that the visual difference between the functional area and the virtual wiring area is weakened, and the visual effect of weakening the etching marks is further achieved.
Drawings
FIG. 1 is a cross-sectional view of a prior art conductive layer after silver migration;
FIG. 2 is a top view of a conductive layer of the prior art;
fig. 3 is a schematic structural diagram of a touch panel according to an embodiment of the present invention;
FIG. 4 is a top view of the virtual wiring area and the functional area with specific patterns at their joints according to the embodiment of the present invention;
FIG. 5 is a top view of a functional region of a conductive layer after forming a filled etch line in accordance with an embodiment of the present invention;
FIG. 6 is a top view of a functional region of a conductive layer after another filling etch line is performed thereon according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for manufacturing a touch panel according to an embodiment of the invention.
Detailed Description
As shown in fig. 2, which is a top view of a conductive layer in the prior art, as shown in fig. 2, the conductive layer includes a Dummy wiring region (Dummy Pattern)11 and a functional region 12. The dummy wiring regions 11 are distributed in regions other than the functional regions 12 and are not electrically connected to the functional regions 12.
As shown in fig. 2, a separating etching line 111 is disposed in the dummy wiring region 11, and the separating etching line separates the dummy wiring region 11 into a plurality of independent floating blocks 112. The dummy wiring region 11 and the functional region 12 are isolated from each other by the separation etching line 111'. Under the conditions of high humidity environment and external electric field, water molecules penetrate into the surface of the silver-containing conductor to electrolyze hydrogen ions (H) + ) And hydroxide ion (OH) - ) Silver in the silver-containing conductor is dissociated under the action of hydroxide ions of an electric field to generate silver ions (Ag) + ) So that under the action of the electric field, hydroxyl ions (OH) - ) With silver ions (Ag) + ) An unstable colloidal precipitate (AgOH) is formed, which in turn decomposes into a black silver oxide precipitate (Ag) 2 O). The deposition of black silver oxide precipitates on the separation etching line 111' easily causes the functional region 12 and the dummyThe dummy wiring regions 11 are short-circuited.
In view of the above problems, the present invention provides a touch panel, including: a substrate; the conducting layer is arranged on the surface of the substrate and is made of a silver-containing conducting material; the conducting layer comprises a virtual wiring area and a functional area, and a specific graph is arranged at the joint of the virtual wiring area and the functional area, so that the virtual wiring area is electrically insulated from the functional area; an OCA optics glue film, OCA optics glue film covers the conducting layer.
The invention provides a manufacturing method of a touch panel, which comprises the following steps: providing a substrate; forming a conductive layer on the substrate, wherein the conductive layer is made of a silver-containing conductive material; the conducting layer comprises a virtual wiring area and a functional area, the virtual wiring area is distributed in the area outside the functional area, and a specific graph is arranged at the joint of the virtual wiring area and the functional area, so that the virtual wiring area is electrically insulated from the functional area; and forming an OCA optical adhesive layer, wherein the OCA optical adhesive layer covers the conductive layer.
The invention provides a touch panel and a manufacturing method thereof.A conductive layer is arranged on a substrate, and an OCA optical adhesive layer is arranged on the conductive layer; the conducting layer utilizes and contains silver-colored material to make, including virtual wiring district and functional area, through virtual wiring district with the junction sets up specific figure, makes virtual wiring district with the corresponding increase in distance between the functional area, further strengthen virtual wiring district with electrical insulation between the functional area has effectively reduced the risk of silver migration on nanometer silver layer.
In order to make the contents of the present invention more clearly understood, the contents of the present invention will be further described with reference to the accompanying drawings. The invention is of course not limited to this particular embodiment, and general alternatives known to those skilled in the art are also covered by the scope of the invention.
The present invention is described in detail with reference to the drawings, and for convenience of explanation, the drawings are not enlarged partially according to the general scale, and should not be construed as limiting the present invention.
The present embodiment provides a touch panel, as shown in fig. 3, the touch panel includes: substrate 100, conductive layer 101 and OCA optical cement layer 104.
As shown in fig. 4, the conductive layer 101 includes a Dummy wiring region (Dummy Pattern)11 and a functional region 12, a specific Pattern is disposed at a junction (a separation etching line 111') between the Dummy wiring region 11 and the functional region 12, so that a distance between the functional region 12 and the Dummy wiring region 11 is correspondingly increased, the specific Pattern may be in a zigzag shape, a tooth shape, and the like, preferably, the specific Pattern is in a zigzag shape in this embodiment, and as shown in fig. 4, a side of the separation etching line 111' between the Dummy wiring region 11 and the functional region 12, which is close to the functional region 12, is in a zigzag shape, that is, a distance between the Dummy wiring region 11 and the functional region 12 is increased, thereby further enhancing electrical insulation between the Dummy wiring region 11 and the functional region 12, and effectively reducing a risk of silver migration.
In the conventional touch panel, the virtual wiring area 11 and the functional area 12 have an obvious difference in appearance, because a separation etching line 111 (as shown in fig. 2) is formed inside the virtual wiring area 11, and has a different reflectivity from the functional area 12 (an un-etched area), and meanwhile, the deformation of the virtual wiring area 11 is different from the deformation of the substrate, so that diffuse reflection is formed, which is expressed as an etching mark. In a specific situation of the touch panel, for example, in a strong light environment or under a specific angle, the etching mark affects the visual perception of a user viewing the touch panel.
In view of the above problem, in the present embodiment, a filling etching line 113 is provided inside the functional region 12, as shown in fig. 5. The filling etching line 113 divides the functional region 12 into sub-regions, and leaves sufficient conducting space, so that no open circuit is formed inside the functional region 12, and the integrity of the functional region 12 is ensured. The filling etching line 113 and the separation etching line 111 are matched with each other, even if the appearance of the filling etching line 113 is identical or similar to that of the separation etching line 111, for example, by setting an etching line direction, an etching line width, an etching line pitch, and the like. The filling etching line 113 and the separating etching line 111 maintain the same or similar appearance, so that the touch panel (the virtual wiring area 11 and the functional area 12) has the same etching traces, the visual difference between the functional area 12 and the virtual wiring area 11 caused by etching is weakened, and the visual effect of weakening the etching traces is achieved.
Fig. 6 is a top view of the functional region 12 in the conductive layer 101 of this embodiment after another filling etching line 113 is formed. The design of filling the etching line 113 in the functional region 12 not only leaves a conduction region at the periphery of the filling etching line 113, but also leaves a conduction space inside each region divided by the filling etching line 113, so that the impedance generated by filling the etching line is relatively weakened while the integrity of the functional region 12 is ensured.
In addition, an oca (optically Clear adhesive) optical adhesive layer 104 is disposed on the conductive layer 101, so that the visual effect of the etching mark is further reduced. The optical adhesive layer 104 is mainly made of acrylic resin, unsaturated polyester, organic silicon rubber, polyurethane, epoxy resin, and the like.
The conductive layer 101 is made of silver-containing material, and preferably, the conductive layer 101 is made of nano silver wires in the embodiment. The nano silver wire layer 101 may include a matrix and a plurality of nano silver wires embedded in the matrix, the nano silver wires are connected to each other by molecular force to form a conductive network, and the matrix is used to protect the nano silver wires from external environments such as corrosion and abrasion. The nano-silver wires in the nano-silver wire layer 101 may have a wire length of 10 to 300 micrometers, a wire diameter (or line width) of less than 500 nanometers, and an aspect ratio (ratio of wire length to wire diameter) of more than 400.
The touch panel further comprises an adhesion promoting layer 102 and a wiring layer 103, wherein the adhesion promoting layer 102 and the wiring layer 103 are arranged between the conductive layer 101 and the OCA optical adhesive layer 104. The adhesion promoting layer 102 is in an interactive state (not specifically shown in fig. 3) with the silver nanowire conductive layer 101, and the adhesion promoting layer 102 increases the adhesion between the conductive layer 101 and the substrate 100, and simultaneously ensures the electrical contact between the conductive layer 101 and the routing layer 103.
Further, the present embodiment provides a method for manufacturing a touch panel, including:
s01: providing a substrate 100;
s02: forming a conductive layer 101, wherein the conductive layer 101 is arranged on the surface of the substrate 100, and the conductive layer 101 is made of a silver-containing conductive material; the conductive layer 101 includes a dummy wiring region 11 and a functional region 12, the dummy wiring region 11 is distributed outside the functional region 12, and a specific pattern is disposed at a joint of the dummy wiring region 11 and the functional region 12, so that the dummy wiring region 11 is not electrically connected to the functional region 12;
s03: forming an OCA optical cement layer 104, wherein the OCA optical cement layer 104 covers the conductive layer 101.
The substrate 100 is typically made of a transparent insulating material. Further, the substrate 100 may be made of a flexible material having a certain strength and a certain flexibility in industry, including but not limited to acryl, polymethyl methacrylate (PMMA), polyacrylonitrile-butadiene-styrene (ABS), Polyamide (PA), Polyimide (PI), polybenzimidazole Polybutylene (PB), polybutylene terephthalate (PBT), Polycarbonate (PC), polyether ether ketone (PEEK), Polyetherimide (PEI), polyether sulfone (PES), Polyethylene (PE), polyethylene terephthalate (PET), polyethylene tetrafluoroethylene (ETFE), polyethylene oxide, polyglycolic acid (PGA), polymethylpentene (PMP), Polyoxymethylene (POM), polyphenylene ether (PPE), polypropylene (PP), Polystyrene (PS), Polytetrafluoroethylene (PTFE), or the like, Polyurethane (PU), polyvinyl chloride (PVC), polyvinyl fluoride (PVF), polyvinylidene chloride (PVDC), polyvinylidene fluoride (PVDF), styrene-acrylonitrile (SAN), or the like. The substrate 100 may also be made of a rigid material including, but not limited to, glass, metal, ceramic material, and the like. In this embodiment, the substrate 100 is a flexible substrate made of polyimide.
The conductive layer 101 is made of silver-containing material, and the embodiment is preferably a nano silver wire. First, a nano silver solution is applied on the substrate 100 and cured to form a nano silver wire conductive layer 101. In order to increase the adhesion between the silver nanowire conducting layer 101 and the substrate 100, an adhesion promoting layer 102 is formed on the surface of the silver nanowire conducting layer 101, and the adhesion promoting layer 102 is made of a transparent insulating material, such as silicon dioxide, epoxy resin, acryl polymer, and the like. The adhesion promoting layer 102 may be formed by printing or coating. The adhesion promoting layer 102 is typically between 90nm and 150nm, preferably 100nm thick. The adhesion promoting layer 102 can enhance the adhesion between the nano silver wire layer 101 and the substrate 100, so that the nano silver wires are better attached to the substrate 100, the nano silver wires are not easy to move, the lap joint is firmer, and the conductivity and the sensitivity of the touch panel are improved.
Then, the nano silver wire conductive layer 101 is exposed, developed and etched to form a dummy wiring region 11 and a functional region 12. The design of the specific pattern enables the distance between the virtual wiring area 11 and the functional area 12 to be correspondingly increased, further enhances the electrical insulation between the virtual wiring area 11 and the functional area 12, and effectively reduces the risk of silver migration.
Next, a wiring layer 103 is formed on the nano silver conductive layer 101 (including the adhesion promoting layer 102), and the material of the wiring layer 103 may be gold wire or silver wire. The wiring layer 103 may be formed by printing (e.g., gravure printing, letterpress printing, flexography, transfer printing, etc.), sputtering, evaporation, or the like. The wiring layer 103 is used as an interconnection line of the touch electrode, and an area of the wiring layer 103 corresponds to a frame area of the touch panel.
Finally, an OCA optical adhesive layer is formed on the routing layer 103, so that the visual effect of etching marks is further weakened
In summary, in the touch panel provided by the present invention, the conductive layer is disposed on the substrate, and the OCA optical adhesive layer is disposed on the conductive layer; the conducting layer is made of silver-containing materials and comprises a virtual wiring area and a functional area, and a specific graph is arranged at the joint of the virtual wiring area and the functional area, so that the distance between the virtual wiring area and the functional area is correspondingly increased, the electrical insulation between the virtual wiring area and the functional area is further enhanced, and the risk of silver migration of a nano-silver layer is effectively reduced.
Furthermore, the filling etching lines are arranged in the functional area, so that the visual difference between the functional area and the virtual wiring area is weakened, and the visual effect of weakening the etching marks is further achieved.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (5)
1. A touch panel, comprising:
a substrate;
the conducting layer is arranged on the surface of the substrate and is a nano silver wire layer and comprises a matrix and a plurality of nano silver wires embedded in the matrix; the conductive layer comprises a virtual wiring area and a functional area, wherein a separation etching line is arranged in the virtual wiring area, a filling etching line is arranged in the functional area, the separation etching line divides the virtual wiring area into a plurality of independent suspension blocks, the filling etching line divides the functional area into sub-areas, and enough conduction space is reserved, the filling etching line and the separation etching line are matched with each other, and the separation etching line at the joint of the virtual wiring area and the functional area is arranged in a bow shape or a tooth shape, so that the virtual wiring area is electrically insulated from the functional area;
an OCA optics glue film, OCA optics glue film covers the conducting layer.
2. The touch panel of claim 1, wherein the filling etch lines and the separation etch lines have the same line width and line spacing.
3. The touch panel according to claim 1, further comprising: and the adhesion promoting layer and the routing layer are arranged on the surface of the conductive layer.
4. A method for manufacturing a touch panel comprises the following steps:
providing a substrate;
forming a conducting layer on the substrate, wherein the conducting layer is a nano silver wire layer and comprises a matrix and a plurality of nano silver wires embedded in the matrix; the conductive layer comprises a virtual wiring area and a functional area, wherein a separation etching line is arranged in the virtual wiring area, a filling etching line is arranged in the functional area, the separation etching line divides the virtual wiring area into a plurality of independent suspension blocks, the filling etching line divides the functional area into sub-areas, and enough conduction space is reserved, the filling etching line and the separation etching line are matched with each other, and the separation etching line at the joint of the virtual wiring area and the functional area is arranged in a bow shape or a tooth shape, so that the virtual wiring area is electrically insulated from the functional area;
and forming an OCA optical adhesive layer, wherein the OCA optical adhesive layer covers the conductive layer.
5. The method of claim 4, wherein the filling etching line and the separating etching line are formed simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810703167.2A CN108958561B (en) | 2018-06-30 | 2018-06-30 | Touch panel and manufacturing method thereof |
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| CN201810703167.2A CN108958561B (en) | 2018-06-30 | 2018-06-30 | Touch panel and manufacturing method thereof |
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| CN108958561A CN108958561A (en) | 2018-12-07 |
| CN108958561B true CN108958561B (en) | 2022-08-12 |
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| CN201810703167.2A Active CN108958561B (en) | 2018-06-30 | 2018-06-30 | Touch panel and manufacturing method thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110096178A (en) * | 2019-04-29 | 2019-08-06 | 芜湖伦丰电子科技有限公司 | A kind of touch screen structure reducing silver-colored migration probability |
| CN113835542A (en) * | 2020-06-23 | 2021-12-24 | 宸美（厦门）光电有限公司 | Touch screen panel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105009050A (en) * | 2013-02-27 | 2015-10-28 | 未来奈米科技股份有限公司 | Structure of touch pad using dummy pattern for capacitive type touch screen |
| CN107329614A (en) * | 2017-06-30 | 2017-11-07 | 昆山国显光电有限公司 | A kind of contact panel |
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2018
- 2018-06-30 CN CN201810703167.2A patent/CN108958561B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105009050A (en) * | 2013-02-27 | 2015-10-28 | 未来奈米科技股份有限公司 | Structure of touch pad using dummy pattern for capacitive type touch screen |
| CN107329614A (en) * | 2017-06-30 | 2017-11-07 | 昆山国显光电有限公司 | A kind of contact panel |
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Application publication date: 20181207 Assignee: YUNGU (GU'AN) TECHNOLOGY Co.,Ltd.|BAZHOU YUNGU ELECTRONIC TECHNOLOGY Co.,Ltd.|KUNSHAN NEW FLAT PANEL DISPLAY TECHNOLOGY CENTER Co.,Ltd. Assignor: KUNSHAN GO-VISIONOX OPTO-ELECTRONICS Co.,Ltd. Contract record no.: X2019990000156 Denomination of invention: Touch panel and manufacturing method thereof License type: Common License Record date: 20191030 |
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Effective date of registration: 20191206 Address after: No. 2 Xiangshan Avenue, Yongning Street, Zengcheng District, Guangzhou, Guangdong province (the core of Zengcheng economic and Technological Development Zone) Applicant after: Guangzhou Guoxian Technology Co.,Ltd. Address before: 215300, No. 1, Longteng Road, Kunshan Development Zone, Jiangsu, Suzhou, 4 Applicant before: KUNSHAN GO-VISIONOX OPTO-ELECTRONICS Co.,Ltd. |
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