CN111309176A - Touch panel and preparation method thereof - Google Patents
Touch panel and preparation method thereof Download PDFInfo
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- CN111309176A CN111309176A CN202010063198.3A CN202010063198A CN111309176A CN 111309176 A CN111309176 A CN 111309176A CN 202010063198 A CN202010063198 A CN 202010063198A CN 111309176 A CN111309176 A CN 111309176A
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- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000758 substrate Substances 0.000 claims abstract description 155
- 239000002184 metal Substances 0.000 claims abstract description 52
- 229910052751 metal Inorganic materials 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 25
- 238000007639 printing Methods 0.000 claims description 14
- 238000010146 3D printing Methods 0.000 claims description 10
- 239000002861 polymer material Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920001692 polycarbonate urethane Polymers 0.000 claims description 3
- -1 polyethylene terephthalate Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000007772 electrode material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002834 transmittance Methods 0.000 description 9
- 230000000007 visual effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000010329 laser etching Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides a touch panel and a preparation method thereof, wherein the touch panel comprises: the touch screen comprises a substrate, a touch screen and a touch screen, wherein the substrate comprises a visible touch area and a peripheral circuit area; the touch screen comprises a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes are arranged in a visible touch area of the substrate and extend along a first direction; and a plurality of metal leads disposed in a peripheral circuit region of the substrate, the plurality of first electrodes and the plurality of second electrodes being electrically connected to the plurality of metal leads, respectively, wherein the plurality of first electrodes and the plurality of second electrodes are made of different materials. Through setting up the double-deck electrode into different electrode material, not only can improve touch panel because of impedance too high and can't make the shortcoming of jumbo size touch-sensitive screen, can also avoid appearing shielding the problem that looks effect and luminousness are lower.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch panel and a preparation method thereof.
Background
In the conventional capacitive touch panel technology, generally, the double-layer electrodes are made of transparent conductive materials such as Indium Tin Oxide (ITO), but the resistivity of the transparent conductive materials is still higher than that of the metal conductive materials, which results in poor signals, and thus the capacitive touch panel technology cannot be applied to large-sized touch screens. Meanwhile, the double-layer electrodes can also be formed by metal grids (metal mesh) formed by interweaving metal lines, but the metal lines of the double-layer metal mesh have the problems of visual effect shielding and low light transmittance.
Disclosure of Invention
In view of this, embodiments of the present invention are directed to provide a touch panel and a manufacturing method thereof, in which a double-layer electrode is made of different electrode materials, so that a defect that a large-sized touch screen cannot be manufactured due to too high impedance of the touch panel can be overcome, and problems of low visual shielding effect and low light transmittance can be avoided.
According to an aspect of the embodiments of the present invention, there is provided a touch panel including: the touch screen comprises a substrate, a touch screen and a touch screen, wherein the substrate comprises a visible touch area and a peripheral circuit area; the touch screen comprises a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes are arranged in a visible touch area of the substrate and extend along a first direction; and a plurality of metal leads disposed in the peripheral circuit region of the substrate, wherein the plurality of first electrodes and the plurality of second electrodes are electrically connected to the plurality of metal leads, respectively.
In one embodiment, the plurality of first electrodes and the plurality of second electrodes are composed of different materials.
In one embodiment, the first electrode is comprised of a metal mesh and the second electrode is comprised of indium tin oxide.
In one embodiment, the metal lead is printed from 10nm to 100nm of copper or silver powder by a 3D printing technique, and the width of the metal lead is not more than 15 μm or not more than 10 μm.
In one embodiment, the substrate includes a first substrate, the plurality of first electrodes are disposed on a first surface of the first substrate, and the plurality of second electrodes are disposed on a second surface of the first substrate opposite the first surface.
In one embodiment, the substrate includes a first substrate and a second substrate, the plurality of first electrodes are disposed on the first substrate, and the plurality of second electrodes are disposed on the second substrate.
In one embodiment, the substrate includes a first substrate, and the plurality of first electrodes and the plurality of second electrodes are stacked on any surface of the first substrate by a bridging manner.
In one embodiment, the touch panel further comprises a cover plate attached to the substrate; wherein any one of the substrate and the cover plate is made of a hard material or a polymer material.
In one embodiment, the hard material is selected from glass; the high polymer material is selected from polyimide, polyethylene terephthalate, polycarbonate or polyurethane.
According to another aspect of the embodiments of the present invention, there is provided a method for manufacturing a touch panel, including: preparing a substrate, wherein the substrate comprises a visible touch area and a peripheral circuit area; preparing a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction in a visible touch area of the substrate, wherein the plurality of first electrodes and the plurality of second electrodes are made of different materials; arranging alignment targets at the ends of the first electrodes and the second electrodes; aligning the 3D printer to the alignment target by using an image alignment system; and the 3D printer is used for carrying out spray printing on the peripheral circuit area of the substrate according to the received preset circuit pattern so as to form a plurality of metal leads electrically connected with the end parts of the plurality of first electrodes and the plurality of second electrodes, wherein the width of the plurality of metal leads is not more than 15 mu m or not more than 10 mu m.
In one embodiment, before the 3D printer prints the pattern, the preparation method further includes: loading printing raw materials in the 3D printer; wherein the printing material includes copper powder or silver powder of 10nm to 100 nm.
According to the touch panel provided by the embodiment of the invention, the double-layer electrodes are made of different electrode materials, so that the defect that a large-size touch screen cannot be manufactured due to overhigh impedance of the touch panel can be overcome, and the problems of low visual effect shielding and light transmittance can be avoided.
Drawings
Fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a front view direction of a touch panel according to an embodiment of the invention.
Fig. 3 to 6 are schematic structural diagrams of a touch panel according to another embodiment of the invention in a front view direction.
Fig. 7 and 8 are schematic structural diagrams illustrating a front view direction of a touch panel according to still another embodiment of the invention.
Fig. 9 is a schematic structural diagram of a front view direction of a touch panel according to another embodiment of the invention.
Fig. 10 is a schematic flow chart illustrating a method for manufacturing a touch panel according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the present invention in a top view direction, and as shown in fig. 1, the touch panel includes: the touch screen comprises a substrate 12, wherein the substrate 12 comprises a visible touch area and a peripheral circuit area; a plurality of first electrodes 13 extending in a first direction a and a plurality of second electrodes 14 extending in a second direction B disposed in a visible touch region of the substrate 12; and a plurality of metal leads 15 disposed in the peripheral circuit region of the substrate 12, wherein the plurality of first electrodes 13 and the plurality of second electrodes 14 are electrically connected to the plurality of metal leads 15, respectively.
It should be understood that the first electrode 13 and the second electrode 14 may be any one of a sensing electrode and a driving electrode, and when the first electrode 13 is the sensing electrode, the second electrode 14 is the driving electrode; when the first electrode 13 is a driving electrode, the second electrode 14 is a sensing electrode, which is not limited in the embodiment of the invention. It should be understood that the plurality of first electrodes 13 and the plurality of second electrodes 14 are disposed in a visible touch area of the substrate 12, where the visible touch area refers to a central area of the substrate 12 and is equivalent to a display area of a touch screen; a plurality of metal leads 15 are arranged in a peripheral wiring region of the substrate 12, which is an edge region surrounding a central region of the substrate 12. A first electrode 13 is electrically connected to a metal lead 15, and a second electrode 14 is electrically connected to a metal lead 15, so that the plurality of metal leads 15 are collected at the center of a side surface (which may be the upper side, the lower side, the left side or the right side of the touch panel) of the touch panel to be connected to the touch chip, thereby connecting the first electrode and the second electrode to the touch chip.
In one embodiment, the plurality of first electrodes and the plurality of second electrodes are composed of different materials. Since the plurality of first electrodes and the plurality of second electrodes made of the same material may have disadvantages of too high impedance, poor visual effect shielding, or insufficient light transmittance, the plurality of first electrodes and the plurality of second electrodes may be made of different materials, but it should be noted that the embodiment of the present invention does not limit the material of which each of the plurality of first electrodes and the plurality of second electrodes is specifically made, as long as the above-mentioned disadvantages can be avoided.
It should be understood that the plurality of first electrodes 13 extend along the first direction a, any two adjacent first electrodes 13 are not connected to each other, the plurality of second electrodes 14 extend along the second direction B, and any two adjacent second electrodes 14 are not connected to each other. It should be noted that, the embodiment of the present invention does not limit the actual contour structure of the first electrode 13 and the second electrode 14, and the contour structure may be a strip shape, a diamond shape, or a triangle shape, and those skilled in the art can design the contour structure of the first electrode 13 and the second electrode 14 according to the actual application requirement; meanwhile, the embodiment of the present invention also does not limit the actual internal patterns of the first electrode 13 and the second electrode 14, and the internal patterns may be various types of grids, and those skilled in the art may design the internal patterns of the first electrode 13 and the second electrode 14 according to the actual application requirements.
It should also be understood that the first direction a or the second direction B may be an X-axis direction (transverse direction) or a Y-axis direction (longitudinal direction), i.e., when the first direction a is the X-axis direction (transverse direction), the second direction B refers to the Y-axis direction (longitudinal direction), and when the first direction a is the Y-axis direction (longitudinal direction), the second direction B refers to the X-axis direction (transverse direction). It should be noted that, the embodiment of the present invention does not limit the specific distribution direction of the first electrode 13 and the second electrode 14, and a person skilled in the art may design the extending direction of the first electrode 13 and the second electrode 14 according to the actual application requirement.
It should be noted that, the embodiment of the present invention also does not limit the specific positional relationship between the first electrode 13, the second electrode 14 and the substrate 12, and those skilled in the art can design them according to the actual application requirements. Meanwhile, the embodiment of the present invention does not limit the specific number of the substrates 12, the number of the substrates 12 may be one or two, and a person skilled in the art may set the number of the substrates 12 according to the actual application requirement.
Therefore, the double-layer electrodes are made of different electrode materials, so that the defect that the touch panel cannot be used for manufacturing a large-size touch screen due to overhigh impedance can be overcome, and the problems of low visual effect shielding and light transmittance can be solved
In one embodiment of the invention, the first electrode is comprised of a metal mesh and the second electrode is comprised of indium tin oxide.
It should be understood that the electrodes in the touch panel are composed of two layers of electrodes, which can be divided into an upper layer electrode and a lower layer electrode, the upper layer electrode has a higher requirement on impedance, and the lower layer electrode has a lower requirement on impedance, so that the upper layer electrode can be made of a metal mesh made of a metal material with lower impedance, and the lower layer electrode can be made of indium tin oxide with higher light transmittance, so that the defects of the double layer electrode, such as too high impedance, poor visual shielding effect or poor light transmittance, can be avoided.
It should be noted that the embodiments of the present invention do not limit what kind of specific electrodes are the upper electrode and the lower electrode, for example, the upper electrode is defined as a first electrode, and the lower electrode is defined as a second electrode.
In one embodiment of the present invention, the metal lead is printed from 10nm to 100nm of copper powder or silver powder by a 3D printing technique, and the width of the metal lead is not more than 15 μm or not more than 10 μm.
It is to be understood that the width of the metal leads printed by the 3D printing technique is not more than 15 μm or not more than 10 μm. For example, the metal lead has a width of 8 to 15 μm and a thickness of 3 to 8 μm.
In an embodiment, the metal leads 15 are formed by printing nano-scale metal powder through a 3D printing technology, and the plurality of metal leads 15 obtained through 3D printing can be thinned, so that the frame of the touch panel can be narrowed.
It should be understood that when printing metal leads by 3D printing techniques, the 3D printer will print the metal leads using nanoscale conductor powder, e.g., 10nm to 100nm metal powder, which may be silver or copper, etc.
In one embodiment of the present invention, as shown in fig. 2, the substrate includes a first substrate 121, a plurality of first electrodes 13 disposed on a first surface of the first substrate 121, and a plurality of second electrodes 14 disposed on a second surface of the first substrate 121 opposite to the first surface.
It should be understood that the first surface and the second surface refer to the upper and lower surfaces of the first substrate 121, but the embodiment of the present invention does not limit whether the first surface and the second surface specifically refer to the upper surface or the lower surface of the first substrate 121, and when the first surface refers to the upper surface of the first substrate 121, the second surface refers to the lower surface of the first substrate 121, and when the first surface refers to the lower surface of the first substrate 121, the second surface refers to the upper surface of the first substrate 121. In other words, the first electrode 13 and the second electrode 14 may be arbitrarily disposed on the upper surface of the first substrate 121 or the lower surface of the first substrate 121, which is not limited in the embodiment of the present invention.
It should also be understood that the specific positional relationship among the first electrode 13, the second electrode 14 and the first substrate 121 means that the first electrode 13, the second electrode 14 and the first substrate 121 are stacked, and the first substrate 121 separates the first electrode 13 from the second electrode 14. The plurality of first electrodes 13 may be arranged on the first surface of the first substrate 121 in any profile structure and inner pattern; the plurality of second electrodes 14 may be arranged on the second surface of the first substrate 121 in any profile structure and internal pattern. The first electrode 13 and the second electrode 14 are respectively disposed on the upper surface and the lower surface of the first substrate 121, so that the overall thickness of the touch panel can be reduced, and the touch panel can be thinner.
In one embodiment of the present invention, as shown in fig. 3 to 6, the substrates include a first substrate 121 and a second substrate 122, the plurality of first electrodes 13 are disposed on the first substrate 121, and the plurality of second electrodes 14 are disposed on the second substrate 122.
It should be noted that the embodiment of the invention also does not limit the specific positional relationship among the first electrode 13, the second electrode 14, the first substrate 121, and the second substrate 122, as long as the first electrode 13 is disposed on any surface of the first substrate 121 in any contour structure and internal pattern, and the second electrode 14 is disposed on any surface of the second substrate 122 in any contour structure and internal pattern.
In one embodiment, as shown in fig. 3, the first substrate 121 and the second substrate 122 are disposed together between a plurality of first electrodes 13 and a plurality of second electrodes 14, the plurality of first electrodes 13 are disposed on an upper surface of the first substrate 121, and the plurality of second electrodes 14 are disposed on a lower surface of the second substrate 122.
In an embodiment, as shown in fig. 4 and 5, the second substrate 122 is spaced apart from the first substrate 121 by the plurality of first electrodes 13 or the plurality of second electrodes 14, but it is not limited whether the second substrate 122 is spaced apart from the first substrate 121 by the plurality of first electrodes 13 (e.g., shown in fig. 4) or the plurality of second electrodes 14 (e.g., shown in fig. 5). Specifically, as shown in fig. 4, a plurality of first electrodes 13 are arranged on the lower surface of the first substrate 121, and a plurality of second electrodes 14 are arranged on the lower surface of the second substrate 122; as shown in fig. 5, the plurality of first electrodes 13 are disposed on the upper surface of the first substrate 121, and the plurality of second electrodes 14 are disposed on the upper surface of the second substrate 122.
In one embodiment, as shown in fig. 6, the second substrate 122 is spaced apart from the first substrate 121 by a plurality of first electrodes 13 and a plurality of second electrodes 14, the plurality of first electrodes 13 are disposed on a lower surface of the first substrate 121, and the plurality of second electrodes 14 are disposed on an upper surface of the second substrate 122. Since the plurality of first electrodes 13 and the plurality of second electrodes 14 are disposed opposite to each other, when the first electrodes 13 and the second electrodes 14 are attached to each other, in order to insulate the plurality of first electrodes 13 from the plurality of second electrodes 14, the plurality of first electrodes 13 and the plurality of second electrodes 14 may be insulated from each other by bridging, for example, by disposing an insulating paste.
In summary, the first electrode 121 and the second substrate 122 are disposed such that the plurality of first electrodes 13 and the plurality of second electrodes 14 are disposed on the surfaces of different substrates, so that the plurality of first electrodes 13 and the plurality of second electrodes 14 can be simultaneously prepared on the surfaces of different substrates, thereby reducing the manufacturing time of the touch panel.
In one embodiment of the present invention, as shown in fig. 7 and 8, the substrate includes a first substrate 121, and a plurality of first electrodes 13 and a plurality of second electrodes 14 are stacked on any one surface of the first substrate 121 in a bridging manner.
It should be understood that any surface of the first substrate 121 may refer to an upper surface or a lower surface of the first substrate 121, and the embodiment of the invention does not limit whether the plurality of first electrodes 13 and the plurality of second electrodes 14 are disposed on the upper surface or the lower surface of the first substrate 121. For example, as shown in fig. 7, a plurality of first electrodes 13 and a plurality of second electrodes 14 are arranged on the upper surface of the first substrate 121; as shown in fig. 8, a plurality of first electrodes 13 and a plurality of second electrodes 14 are arranged on the upper surface of the first substrate 121.
It should be noted that the embodiment of the present invention also does not limit the specific method for bridging, and the bridging may be a method of disposing an insulating paste between the plurality of first electrodes 13 and the plurality of second electrodes 14, or may be another method as long as the plurality of first electrodes 13 and the plurality of second electrodes 14 can be insulated from each other.
In one embodiment, the specific positional relationship among the first electrode 13, the second electrode 14 and the first substrate 121 is that the first electrode 13, the second electrode 14 and the first substrate 121 are stacked, and the first electrode 13 and the second electrode 14 are disposed on the surface of the same side of the first substrate 121. The plurality of first electrodes 13 and the plurality of second electrodes 14 may be arranged on the surface of the same side of the first substrate 121 in any contour structure and inner pattern, and an insulating paste is disposed between the plurality of first electrodes 13 and the plurality of second electrodes 14.
In summary, the first electrode 13 and the second electrode 14 are disposed on any surface of the first substrate 121, so that the overall thickness of the touch panel can be reduced, and the touch panel is thinner.
For any of the above embodiments, regardless of the structure of the touch panel, the first electrode and the second electrode are electrically connected to the plurality of metal leads, that is, the metal lead electrically connected to the first electrode and the first electrode are disposed in different areas (i.e., visible touch area and peripheral circuit area) of the same surface of the substrate, the metal lead electrically connected to the second electrode and the second electrode are disposed in different areas (i.e., visible touch area and peripheral circuit area) of the same surface of the substrate, and all the metal leads formed by the preparation are collected in the center of a certain side surface (i.e., upper side, lower side, left side or right side of the touch panel) of the touch panel to be connected to the touch chip, so that the first electrode and the second electrode are connected to the touch chip respectively.
In an embodiment of the invention, as shown in fig. 9, the touch panel further includes a cover plate 11 attached to the substrate 12.
It should be understood that the cover plate 11 is disposed above the substrate 12 of the electrode to improve the impact resistance of the touch panel, thereby protecting the first electrode and the second electrode from being damaged when the touch panel is subjected to an impact force.
In one embodiment of the present invention, either one of the base plate and the cover plate is made of a hard material or a polymer material.
It should be understood that the substrate may be made of a hard material or a polymer material, the cover plate may also be made of a hard material or a polymer material, and the materials used for the substrate and the cover plate may be combined arbitrarily to form a touch panel composed of film layers of different materials.
It should also be understood that when the substrate and cover plate materials are made of hard materials, the overall hardness of the touch panel may be enhanced, thereby improving the impact resistance of the touch panel; when the substrate and the cover plate are made of high polymer materials, the touch panel is lighter and thinner and can be attached more easily.
In one embodiment of the invention, the hard material is selected from glass; the high molecular material is selected from polyimide, polyethylene terephthalate, polycarbonate or polyurethane.
It should be noted that, in the embodiments of the present invention, specific manufacturing components of the hard material and the polymer material are not limited, as long as the light transmittance requirement of the touch panel can be met.
Fig. 10 is a schematic flow chart illustrating a method for manufacturing a touch panel according to an embodiment of the invention. As shown in fig. 10, the preparation method includes:
s101: preparing a substrate, wherein the substrate comprises a visual touch area and a peripheral circuit area.
It should be understood that the visible touch area refers to a central area of the first substrate, which is equivalent to a display area of the touch screen; the peripheral routing area refers to an edge area surrounding a central area of the first substrate.
It should be noted that, in the embodiment of the present invention, the specific number of the substrates to be prepared is not limited, the number of the substrates may be one or two, and a person skilled in the art may prepare the number of the substrates according to actual application requirements, and meanwhile, the embodiment of the present invention does not limit how to prepare the specific implementation process of the substrates.
S102: a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction are prepared in a visible touch area of a substrate, and the first electrodes and the second electrodes are made of different materials.
It should be noted that, the embodiment of the present invention does not limit the preparation sequence of the plurality of first electrodes and the plurality of second electrodes in the visible touch area of the substrate; the embodiment of the present invention also does not limit the actual contour structure of the first electrode and the second electrode, and the contour structure may be a bar shape, a diamond shape or a triangle shape, and those skilled in the art can prepare the contour structure of the first electrode and the second electrode according to the actual application requirement; the embodiment of the present invention also does not limit the actual internal patterns of the first electrode and the second electrode, and the internal patterns thereof may be various types of grids, and those skilled in the art can prepare the internal patterns of the first electrode and the second electrode according to the actual application requirements.
In one embodiment, the plurality of first electrodes and the plurality of second electrodes are composed of different materials. Since the plurality of first electrodes and the plurality of second electrodes made of the same material may have disadvantages of too high impedance, poor visual effect shielding, or insufficient light transmittance, the plurality of first electrodes and the plurality of second electrodes may be made of different materials, but it should be noted that the embodiment of the present invention does not limit the material of which each of the plurality of first electrodes and the plurality of second electrodes is specifically made, as long as the above-mentioned disadvantages can be avoided. For example, when the first electrodes are upper electrodes of the touch panel and the second electrodes are lower electrodes of the touch panel, the first electrodes are made of metal grids, and the second electrodes are made of indium tin oxide.
It should be understood that the specific positional relationship between the first electrode, the second electrode and the substrate can be prepared according to the requirements of practical application. For example, when the substrate includes only the first substrate, the plurality of first electrodes are disposed on a first surface of the first substrate, and the plurality of second electrodes are disposed on a second surface of the first substrate opposite to the first surface; or a plurality of first electrodes and a plurality of second electrodes are stacked on any surface of the first substrate in a bridging manner. For example, when the substrate includes a first substrate and a second substrate, a plurality of first electrodes may be disposed on any surface of the first substrate, and a plurality of second electrodes may be disposed on any surface of the second substrate.
It should be noted that, the embodiment of the present invention does not limit how to prepare the plurality of first electrodes and the plurality of second electrodes in the visible touch area of the substrate.
S103: and arranging alignment targets at the ends of the first electrodes and the second electrodes.
Specifically, after the first electrodes and the second electrodes are prepared on the surface of the substrate, alignment targets are arranged at the ends of the first electrodes and the second electrodes, and the alignment targets are used for accurately finding the positions of the first electrodes and the second electrodes so as to facilitate the subsequent 3D printing process.
In the embodiment of the present invention, a specific implementation process of disposing the alignment targets at the ends of the plurality of first electrodes and the plurality of second electrodes is not limited.
S104: and aligning the 3D printer to the alignment target by using an image alignment system.
The embodiment of the present invention does not limit the specific implementation process of aligning the 3D printer to the alignment target by using the image alignment system.
S105: and the 3D printer performs spray printing on the peripheral circuit area of the first substrate according to the received preset circuit pattern to form a plurality of metal leads which are electrically connected with the end parts of the first electrodes and the second electrodes in an extending way, wherein the width of the metal leads is not more than 15 mu m or not more than 10 mu m.
Specifically, after the 3D printer is aligned with the alignment target, the 3D printer may send a predetermined circuit pattern to the receiving terminal, and the 3D printer may perform a spray printing pattern corresponding to the predetermined circuit pattern on the peripheral circuit region based on programming or modeling, and finally place the peripheral circuit region in an oven for drying, so as to print a plurality of metal leads having a width not greater than 15 μm or not greater than 10 μm, such as a width of 8 μm to 15 μm and a thickness of 3 μm to 8 μm, electrically connected to the end portions of the plurality of first electrodes and the plurality of second electrodes.
Therefore, the 3D printer can print a plurality of metal leads with the width of 8-15 μm and the thickness of 3-8 μm according to the preset circuit pattern by means of programming or modeling and the like. However, the embodiment of the present invention does not limit the specific programming or modeling manner, and does not limit the preset circuit pattern.
In one embodiment, the method further includes preparing a cover plate attached over the substrate on which the first and second electrodes are prepared. However, the embodiment of the present invention is not limited to the specific implementation process of attaching the cover plate on the substrate having the first electrode and the second electrode.
In one embodiment of the present invention, the plurality of first electrodes and the plurality of second electrodes are fabricated by a laser etching and/or photolithography process.
It should be understood that the first electrode layer and the second electrode layer may be first prepared on the surface of the first substrate, and then the plurality of first electrodes and the plurality of second electrodes may be prepared on the surface of the first substrate using a laser etching or/and photolithography process. It should be noted that, in the embodiments of the present invention, the specific implementation process of preparing the first electrode layer and the second electrode layer is not limited, and the first electrode layer and the second electrode layer may be prepared by sputtering or the like.
In one embodiment, the laser etching specifically refers to irradiating a high-energy laser beam on the sensing electrode layer and/or the driving electrode layer according to a preset profile structure and an internal pattern, so as to melt and vaporize the irradiated portion of the laser beam, thereby etching the portion, thereby forming the sensing electrode and the driving electrode in a final permanent pattern. The photolithography process specifically refers to exposing, developing and curing portions of the first electrode layer and/or the second electrode layer according to a predetermined profile structure and an internal pattern, so as to retain the portions, which are the first electrode and the second electrode in a final permanent pattern.
It should be noted that the laser etching or yellow light process and the 3D printing are matched to complete the preparation of the first electrode and the second electrode in the visible touch area and the preparation of the metal lead in the peripheral circuit area. That is, since the positions of the first electrode and the second electrode may affect the placement position of the alignment target, the preparation of the metal lead in the 3D printing may be affected.
In one embodiment of the present invention, before the 3D printer prints the pattern, the preparation method further includes: loading printing raw materials in the 3D printer; wherein the printing material includes copper powder or silver powder of 10nm to 100 nm.
It should be understood that the 3D printer prints the metal wire through the printing raw material loaded therein, and the printing raw material includes copper powder or silver powder of 10nm to 100 nm.
It should be noted that the combination of the features in the present application is not limited to the combination described in the claims or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradictory to each other.
It should be noted that the above-mentioned embodiments are only specific examples of the present invention, and obviously, the present invention is not limited to the above-mentioned embodiments, and many similar variations exist. All modifications which would occur to one skilled in the art and which are, therefore, directly derived or suggested from the disclosure herein are deemed to be within the scope of the present invention.
It should be understood that the terms such as first, second, etc. used in the embodiments of the present invention are only used for clearly describing the technical solutions of the embodiments of the present invention, and are not used to limit the protection scope of the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (10)
1. A touch panel, comprising:
the touch screen comprises a substrate, a touch screen and a touch screen, wherein the substrate comprises a visible touch area and a peripheral circuit area;
the touch screen comprises a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes are arranged in a visible touch area of the substrate and extend along a first direction; and
a plurality of metal leads disposed in a peripheral circuit region of the substrate, the plurality of first electrodes and the plurality of second electrodes being electrically connected to the plurality of metal leads, respectively;
wherein the plurality of first electrodes and the plurality of second electrodes are composed of different materials.
2. The touch panel of claim 1, wherein the first electrode is made of a metal mesh and the second electrode is made of indium tin oxide.
3. The touch panel according to claim 1, wherein the metal lead is printed by a 3D printing technique from 10nm to 100nm of copper powder or silver powder, and a width of the metal lead is not more than 15 μm or not more than 10 μm.
4. The touch panel of claim 1, wherein the substrate comprises a first substrate, the first electrodes are disposed on a first surface of the first substrate, and the second electrodes are disposed on a second surface of the first substrate opposite the first surface.
5. The touch panel of claim 1, wherein the substrate comprises a first substrate and a second substrate, the first electrodes are disposed on the first substrate, and the second electrodes are disposed on the second substrate.
6. The touch panel of claim 1, wherein the substrate comprises a first substrate, and the first electrodes and the second electrodes are stacked on any surface of the first substrate by a bridging manner.
7. The touch panel according to any one of claims 1 to 6, further comprising a cover sheet attached to the substrate; wherein any one of the substrate and the cover plate is made of a hard material or a polymer material.
8. Touch panel according to claim 7, wherein the hard material is selected from glass; the high polymer material is selected from polyimide, polyethylene terephthalate, polycarbonate or polyurethane.
9. A method for manufacturing a touch panel includes:
preparing a substrate, wherein the substrate comprises a visible touch area and a peripheral circuit area;
preparing a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction in a visible touch area of the substrate, wherein the plurality of first electrodes and the plurality of second electrodes are made of different materials;
arranging alignment targets at the ends of the first electrodes and the second electrodes;
aligning the 3D printer to the alignment target by using an image alignment system; and
and the 3D printer is used for carrying out spray printing on the peripheral circuit area of the substrate according to the received preset circuit pattern so as to form a plurality of metal leads electrically connected with the end parts of the plurality of first electrodes and the plurality of second electrodes, wherein the width of each metal lead is not more than 15 mu m or not more than 10 mu m.
10. The method of preparing according to claim 9, wherein before the 3D printer jets the pattern, the method further comprises:
loading printing raw materials in the 3D printer;
wherein the printing material includes copper powder or silver powder of 10nm to 100 nm.
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