CN111651088B - Touch display panel and manufacturing method thereof - Google Patents
Touch display panel and manufacturing method thereof Download PDFInfo
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- CN111651088B CN111651088B CN202010547056.4A CN202010547056A CN111651088B CN 111651088 B CN111651088 B CN 111651088B CN 202010547056 A CN202010547056 A CN 202010547056A CN 111651088 B CN111651088 B CN 111651088B
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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
- G06F3/0412—Digitisers structurally integrated in a display
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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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
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
- H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- Position Input By Displaying (AREA)
Abstract
The application discloses a touch display panel and a manufacturing method thereof, wherein the touch display panel comprises a display area, the touch display panel comprises a display panel and a touch panel, the touch panel comprises a first electrode, the first electrode is arranged in the display area, the first electrode is arranged on the display panel, and the composition material of the first electrode comprises photosensitive silver paste material; according to the scheme, the yield of the touch display panel is improved, and the cost of the touch display panel is reduced.
Description
Technical Field
The application relates to the technical field of display, in particular to the technical field of display panel manufacturing, and particularly relates to a touch display panel and a manufacturing method thereof.
Background
The DOT (Direct On Cell Touch) technology, as a technology integrating an Organic Light-Emitting Diode (OLED) and a Touch structure, has the characteristics of high transmittance, bending resistance, Light weight, thinness and the like, compared with the externally-hung Touch technology, and will lead the development direction of OLED display Touch panels.
In the prior art, a touch structure is formed by using a low-temperature vacuum process, although the problem of poor heat resistance of an OLED device can be considered, the low-temperature vacuum process needs to be performed through processes such as low-temperature PVD (Physical Vapor Deposition), low-temperature CVD (Chemical Vapor Deposition), and low-temperature dry etching, the final film quality characteristics of a formed film are poor due to the low-temperature PVD process or the low-temperature CVD process, plasma in the low-temperature PVD process or the low-temperature CVD process damages an OLED package structure, and the OLED device layer, the package layer, and the touch layer are peeled off due to the complexity of the low-temperature vacuum process, so that the product yield is seriously reduced and the product cost is increased.
In summary, it is desirable to provide a touch display panel and a method for manufacturing the same, which can improve the yield of products and reduce the cost of products.
Disclosure of Invention
The embodiment of the application provides a touch display panel and a manufacturing method thereof, wherein the touch display panel comprises a first electrode positioned in a display area of the touch display panel, and the first electrode is manufactured by adopting photosensitive silver paste; the problems that the existing touch electrode is prepared by adopting a common metal material and a film forming property is poor, the OLED packaging structure is damaged, and the OLED device layer, the packaging layer and the touch layer are peeled off due to the low-temperature vacuum process are solved, so that the problems of low product yield and high product cost caused by the risks are solved.
The embodiment of the present application provides a touch display panel, touch display panel includes the display area, touch display panel includes display panel and touch panel, touch panel includes:
the display panel comprises a display area, a first electrode, a second electrode and a third electrode, wherein the first electrode is arranged in the display area, the first electrode is arranged on the display panel, and the component material of the first electrode comprises a photosensitive silver paste material.
In one embodiment, the photosensitive silver paste material comprises a plurality of silver particles, the silver particles are spherical, the diameter of the silver particles is not more than 1 micron, and the composition material of the silver particles comprises silver phosphate.
In one embodiment, the touch panel further includes:
the interface layer is at least arranged between the display panel and the first electrode, and the composition material of the interface layer comprises silicon oxide or amorphous silicon.
In one embodiment, the touch panel further includes:
the second electrode is arranged on one side, far away from the display panel, of the first electrode, and the composition material of the second electrode is the same as that of the first electrode.
In an embodiment, the second electrode intersects with the first electrode, and the touch panel further includes:
the composite layer is arranged between the first electrode and the second electrode, the composite layer is at least arranged opposite to the intersection of the first electrode and the second electrode, the composite layer comprises an insulating layer, and the insulating layer is made of at least one of silicon nitride and silicon oxynitride.
In an embodiment, the composite layer further includes a first interface layer and a second interface layer, the first interface layer and the second interface layer are disposed on two sides of the insulating layer, and the first interface layer and the second interface layer are made of silicon oxide or amorphous silicon.
In one embodiment, the first electrode comprises:
the two first electrode parts and the second electrode are arranged on the same layer, and the two first electrode parts are arranged on two sides of the second electrode;
a bridge portion disposed opposite an intersection of the first electrode and the second electrode, the bridge portion including:
the bridge body is arranged between the two first electrode parts and arranged on one side of the composite layer close to the display panel,
the two bridge ends are respectively arranged on two sides of the bridge body and are respectively connected with the bridge body and the two first electrode parts.
In one embodiment, the cross-sectional view of the bridge body along the vertical direction is a trapezoid, and the included angles between two oblique sides and the bottom side of the trapezoid are both smaller than 45 °.
In one embodiment, the touch display panel further includes a non-display area disposed around the display area, and the touch panel further includes:
the first electrodes are arranged in parallel;
the first electrode bus is arranged in the non-display area and electrically connected with the plurality of first electrodes, and the composition material of the first electrode bus is the same as that of the first electrodes.
The embodiment of the present application further provides a manufacturing method of a touch display panel, which is used for manufacturing the touch display panel as described in any one of the above paragraphs, where the touch display panel includes a display area, and the method includes:
providing a display panel;
and forming a first electrode in a region corresponding to the display region on the display panel through a photoetching process, wherein the first electrode comprises a photosensitive silver paste material.
The embodiment of the application provides a touch display panel and a manufacturing method thereof, the touch display panel comprises a display panel and a touch panel, the touch panel comprises a first electrode arranged on the display panel and arranged in a display area of the touch display panel, and the composition material of the first electrode comprises photosensitive silver paste material. According to the scheme, the first electrode is made of the photosensitive silver paste material, so that the film quality characteristic of a formed film caused by the use of a common metal material for preparing the first electrode is poor, the OLED packaging structure is damaged, and a series of risks such as peeling of an OLED device layer, an encapsulating layer and a touch layer are avoided.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a structural diagram of a touch display panel according to an embodiment of the present application.
Fig. 2 is a schematic top view of a touch display panel according to an embodiment of the present disclosure.
Fig. 3 is a schematic cross-sectional view of a touch display panel according to an embodiment of the present disclosure.
Fig. 4 is a schematic cross-sectional view of another touch display panel according to an embodiment of the present disclosure.
Fig. 5 is a schematic cross-sectional view of another touch display panel according to an embodiment of the present disclosure.
Fig. 6 is a schematic cross-sectional view of another touch display panel provided in the embodiment of the present application.
Fig. 7 is a flowchart of a method for manufacturing a touch display panel according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and continuously described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 application.
In the description of the present application, it is to be understood that the terms "away from," "close to," "below," "vertical," and the like, indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the drawings, elements having similar structures are denoted by the same reference numerals. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Embodiments of the present application provide a touch display panel, which includes but is not limited to the following embodiments.
In an embodiment, as shown in fig. 1, the touch display panel 00 includes a display area 01, the touch display panel 00 includes a display panel 10 and a touch panel 20, as shown in fig. 2, the touch panel 20 includes a first electrode 201, the first electrode 201 is disposed in the display area 01, the first electrode 201 is disposed on the display panel 10, and a constituent material of the first electrode 201 includes a photosensitive silver paste material.
Wherein, the constitution material of sensitization silver thick liquid material includes a plurality of silver granules, the silver granule is the spheroid, the diameter of silver granule is not more than 1 micron, the constitution material of silver granule includes the phosphate of silver. On one hand, the diameter of the silver particles is not more than 1 micron, so that the line width of the first electrode 201 made of the photosensitive silver paste can be not more than 8 microns, and the requirement of high line width resolution of the first electrode 201 is greatly met; further, the silver particles may have a diameter of 0.2 to 1 micrometer, and may have a line width of 2 to 8 micrometers for the first electrode 201; still further, because the sensitization silver thick liquid belongs to the photoresist, can adopt the lithography process to form, the lithography process has the characteristics that the resolution is high, the linewidth of first electrode 201 can be up to 2 microns, the membrane thickness of first electrode 201 can be 1 micron to 5 microns, because first electrode 201 sets up between adjacent row or row subpixel, consequently, the area of subpixel can effectively be increased to the first electrode 201 of high resolution, improves light utilization ratio. On the other hand, because the constituent material of the silver particles includes silver phosphate, in the process of baking the photosensitive silver paste material, the silver phosphate can penetrate through the photosensitive paste to connect conductive materials such as silver simple substances and the like, so as to form ohmic contact, and reduce the impedance of the first electrode 201.
In one embodiment, the total mass fraction of the plurality of silver particles in the photosensitive silver paste material is 75-85%, and the total mass fraction of the phosphate of silver in the plurality of silver particles is 2-5%, and the phosphate of silver may include, but is not limited to, silver orthophosphate, silver pyrophosphate, and silver metaphosphate.
In an embodiment, the photosensitive silver paste material further includes a conductive colloid, an organic vehicle, a photopolymerization agent, a photoinitiator, an adhesion promoter, a thickening agent and a leveling agent. Specifically, the photosensitive silver paste material is characterized in that the conductive colloid is 4-8% in mass fraction, has a conductive effect, can be electrically connected with a silver simple substance, and increases the conductivity of the photosensitive silver paste material; the mass fraction of the organic carrier in the photosensitive silver paste material is 9% -18%, the organic carrier can be a resin solvent, the resin solvent comprises polyvinyl acetate, polyamide and hydrogenated petroleum resin, and the hydrogenated petroleum resin can enhance the stability of the silver paste material after curing; the adhesion promoter in the photosensitive silver paste material comprises at least one of a phosphorus-containing compound, a chromium complex coupling agent, a titanate coupling agent and an aluminate coupling agent, and can increase the adhesion between the silver paste material and a film layer below the silver paste material.
In an embodiment, as shown in fig. 3, which is a cross-sectional view taken along a line 02 and directed vertically downward in fig. 2, the touch panel 20 further includes an interface layer 202, the interface layer 202 is at least disposed between the display panel 10 and the first electrode 201, and a constituent material of the interface layer 202 includes silicon oxide or amorphous silicon.
It is understood that the display panel 10 may be an OLED display panel, and as shown in fig. 3, the display panel 10 may include an array substrate 101, a light emitting layer 102 disposed on the array substrate 101, and an encapsulation layer 103 disposed on the light emitting layer 102. Specifically, the array substrate 101 may include a base layer, a light shielding layer, a buffer layer, a thin film transistor device layer, a planarization layer, an anode layer, and a pixel defining layer, and the light emitting layer 102 may include a plurality of light emitting device layers and cathode layers that emit light of different colors. When the display panel 10 is a rigid OLED display panel, the substrate layer may be a glass substrate, and the encapsulation layer 103 may also be glass; when the display panel 10 is a flexible OLED display panel, the substrate layer may be a polyimide substrate, and the encapsulation layer 103 is a composite layer formed by laminating an organic layer and an inorganic layer.
In particular, regardless of the specific structure of the encapsulation layer 103, in this embodiment, silicon oxide or amorphous silicon may be used for the encapsulation layer 103, and the interface layer 202 is formed by a low temperature CVD process to serve as a film formation substrate for the first electrode 201, so as to improve the adhesion of the first electrode 201 on the display panel 10.
In an embodiment, as shown in fig. 2 and 4, the touch panel 20 further includes a second electrode 203, the second electrode 203 is disposed in the display area 01, the second electrode 203 is disposed on a side of the first electrode 201 away from the display panel 10, and a composition material of the second electrode 203 is the same as a composition material of the first electrode 201.
It can be understood that the touch panel 20 may include a plurality of first electrodes 201 disposed in parallel in the same layer, and a plurality of first electrodes 203 disposed in parallel in the same layer, and the intersection of each second electrode 203 and each first electrode 201 may form a capacitor, and when a certain position is pressed to change the corresponding capacitance value, the touch display panel 00 may recognize the coordinates of the point to feedback the change.
In one embodiment, as shown in fig. 4, the touch panel 20 further includes a composite layer 204, the composite layer 204 is disposed between the first electrode 201 and the second electrode 204, and the composite layer 204 is disposed opposite to at least the intersection of the first electrode 201 and the second electrode 203.
The composite layer 204 includes an insulating layer, and the constituent material of the insulating layer includes at least one of silicon nitride and silicon oxynitride, and it can be understood that the insulating layer has high insulating property, and can prevent the intersection position of the first electrode 201 and the second electrode 203 from being short-circuited when the touch panel 20 is pressed. The composite layer 204 further comprises a first interface layer and a second interface layer, the first interface layer and the second interface layer are disposed on two sides of the insulating layer, the first interface layer and the second interface layer are made of silicon oxide or amorphous silicon, specifically, the first interface layer and the second interface layer can be referred to the above description related to the interface layer 202, and similarly, the first interface layer and the second interface layer can improve the adhesion between the composite layer 204 and the first electrode 201, and improve the adhesion between the composite layer 204 and the second electrode 203. Wherein the refractive index of the composite layer 204 is in the range of 1.75-1.95.
In an embodiment, as shown in fig. 5, the first electrode 201 includes two first electrode portions 2011, the two first electrode portions 2011 and the second electrode 203 are disposed in the same layer, and the two first electrode portions 2011 are disposed on two sides of the second electrode 203; the bridge portion is arranged opposite to the intersection of the first electrode 2011 and the second electrode 203, the bridge portion comprises a bridge body 2012 and two bridge ends 2013, the bridge body 2012 is arranged between the two first electrode portions 2011, the bridge body 2012 is arranged on one side of the display panel 10 close to the composite layer 204, the two bridge ends 2013 are respectively arranged on two sides of the bridge body 2012, and the two bridge ends 2013 are respectively connected with the bridge body 2012 and the two first electrode portions 2011.
Further, a third interface layer may be disposed between the first electrode 201 and the interface layer 202, and a specific material of the third interface layer may be the same as that of the interface layer 202; or the concrete material and the structure of third interface layer can with the composite bed 204 is the same, and is further, when the preparation is accomplished after the shaft 2012, can be in shaft 2012 with form corresponding rete in proper order on the interface layer 202, then a plurality of form two through-holes through the process of punching on the rete with the third interface layer, and fill in two through-holes sensitization silver thick liquid material forms two bridge ends 2013, wherein, the upper surface and the lower surface of through-hole can be circular or square, can understand, the size of the upper surface of through-hole is greater than the size of its lower surface, the diameter of the lower surface of through-hole is 5 microns, or the diagonal of the lower surface of through-hole is 5 microns.
In one embodiment, as shown in fig. 5, the bridge 2012 has a trapezoidal cross-section along the vertical direction, and the angles between the two oblique sides and the bottom side of the trapezoid are both less than 45 °. It can be understood that, by appropriately reducing the slopes of the two sides of the bridge body 2012, the separation between the bridge body 2012 and the third boundary layer caused by the excessive edge angle of the bridge body 2012 can be avoided, which helps to improve the adhesion between the third boundary layer and the bridge body 2012. Or, convex arc shapes can be set between the two side surfaces of the bridge body 2012 and the upper surface of the bridge body 2012 for transition so as to avoid edges and corners; further, both side surfaces of the bridge body 2012 can also be convex to increase the contact area between the bridge body 2012 and the third interface layer.
In an embodiment, as shown in fig. 2, the touch display panel 00 further includes a non-display area 03, the non-display area 03 is disposed around the display area 01, and the touch panel 00 further includes: a plurality of the first electrodes 201, wherein the plurality of the first electrodes 201 are arranged in parallel; the first electrode bus 205 is disposed in the non-display area 03, the first electrode bus 205 is electrically connected to the plurality of first electrodes 201, and a composition material of the first electrode bus 205 is the same as a composition material of the first electrodes 201.
It is understood that the first electrode bus 205 may be disposed at one side of the plurality of first electrodes 201, and one end of the plurality of first electrodes 201 is connected together to directly transmit signals to the plurality of first electrodes 201 through the first electrode bus 205.
Further, as shown in fig. 6, a first connection end 206 may be further disposed below the first electrode bus 205, the first connection end 206 may be disposed at the same layer as the bridge end 2013, a first fuse 207 may be further disposed below the first connection end 206, and the first fuse 207 is electrically connected to the first electrode bus 205 through the first connection end 206. Specifically, the first electrode bus 205 and the first fuse 207 may be electrically connected to the plurality of first electrodes 201, and transmit the same signal to the plurality of first electrodes 201. On one hand, the first electrode bus 205 and the first fuse 207 connected to each other are advantageous for reducing impedance; on the other hand, the first fuse 207 can prevent the signal from being unable to be transmitted due to the fracture of the first electrode bus 205, thereby improving the reliability of signal transmission.
Similarly, the touch panel 00 further includes a plurality of second electrodes 203, and the plurality of second electrodes 203 are arranged in parallel; and the second electrode bus is arranged in the non-display area 03 and electrically connected with the plurality of second electrodes 203, and the composition material of the second electrode bus is the same as that of the first electrode 201. Further, the touch panel 00 may further include a second connection terminal and a second fuse. Specifically, the second electrode bus may refer to the above-mentioned description related to the first electrode bus 205, and the second connection terminal and the second fuse may refer to the above-mentioned description related to the first connection terminal and the first fuse, respectively.
Embodiments of the present application further provide a method for manufacturing a touch display panel, for manufacturing the touch display panel as described in any of the above, where the touch display panel includes a display area, and the method includes, but is not limited to, the following embodiments.
In one embodiment, as shown in FIG. 7, the method includes the following steps.
S10, providing a display panel.
It is understood that the display panel may be an OLED display panel, and the display panel may include an array substrate, a light emitting layer disposed on the array substrate, and an encapsulation layer disposed on the light emitting layer. Specifically, the array substrate may include a base layer, a light shielding layer, a buffer layer, a thin film transistor device layer, a planarization layer, an anode layer, and a pixel defining layer, and the light emitting layer may include a plurality of light emitting device layers and cathode layers that emit light of different colors. When the display panel is a rigid OLED display panel, the substrate layer can be a glass substrate, and the encapsulation layer can also be glass; when the display panel is a flexible OLED display panel, the substrate layer can be a polyimide substrate, and the encapsulation layer is a composite layer formed by laminating an organic layer and an inorganic layer.
And S20, forming a first electrode in a region corresponding to the display region on the display panel through a photoetching process, wherein the first electrode comprises a photosensitive silver paste material.
Wherein, the constitution material of sensitization silver thick liquid material includes a plurality of silver granules, the silver granule is the spheroid, the diameter of silver granule is not more than 1 micron, the constitution material of silver granule includes the phosphate of silver. On one hand, the diameter of the silver particles is not more than 1 micron, so that the line width of the first electrode made of the photosensitive silver paste can be not more than 8 microns, and the requirement of the first electrode on high line width resolution is greatly met; further, the silver particles may have a diameter of 0.2 to 1 micrometer, and may have a line width of 2 to 8 micrometers for the first electrode; still further, because sensitization silver thick liquid belongs to the photoresist, can adopt the photoetching process to form, and the photoetching process has the characteristics that the resolution is high, the linewidth of first electrode can be up to 2 microns, the membrane thickness of first electrode can be 1 micron to 5 microns, because first electrode sets up between adjacent row or row subpixel, consequently, the area of subpixel can effectively be increased to the first electrode of high resolution, improves light utilization ratio. On the other hand, because the component material of silver granule includes the phosphate of silver, toasting the in-process of sensitization silver thick liquid material, the phosphate of silver can pass sensitization thick liquids, connects conducting material such as silver simple substance to form ohmic contact, reduce the impedance of first electrode.
In one embodiment, the total mass fraction of the plurality of silver particles in the photosensitive silver paste material is 75-85%, and the total mass fraction of the phosphate of silver in the plurality of silver particles is 2-5%, and the phosphate of silver may include, but is not limited to, silver orthophosphate, silver pyrophosphate, and silver metaphosphate.
In an embodiment, the photosensitive silver paste material further includes a conductive colloid, an organic vehicle, a photopolymerization agent, a photoinitiator, an adhesion promoter, a thickening agent and a leveling agent. Specifically, the photosensitive silver paste material is characterized in that the conductive colloid is 4-8% in mass fraction, has a conductive effect, can be electrically connected with a silver simple substance, and increases the conductivity of the photosensitive silver paste material; the mass fraction of the organic carrier in the photosensitive silver paste material is 9% -18%, the organic carrier can be a resin solvent, the resin solvent comprises polyvinyl acetate, polyamide and hydrogenated petroleum resin, and the hydrogenated petroleum resin can enhance the stability of the silver paste material after curing; the adhesion promoter in the photosensitive silver paste material comprises at least one of a phosphorus-containing compound, a chromium complex coupling agent, a titanate coupling agent and an aluminate coupling agent, and can increase the adhesion between the silver paste material and a film layer below the silver paste material.
It should be noted that, since the photosensitive silver paste is a photoresist material, a photolithography process may be used to form the first electrode. Specifically, a photosensitive silver paste layer may be coated on the display panel through a coating process, and then exposed through a photomask to remove or retain the photosensitive silver paste layer in the corresponding region, and cured at a low temperature to form the stable first electrode. It can be understood that the first electrode in the scheme does not need to be subjected to a complex and harsh vacuum metal film forming process, and if the first electrode is abnormal, the first electrode can be removed at any time, so that a rework process is realized, and therefore the scheme can improve the product yield and greatly reduce the product cost.
In other embodiments, the method may further include other steps to form the complete touch display panel, and the specific steps may be set according to the above related structures and their positions.
The embodiment of the application provides a touch display panel and a manufacturing method thereof, the touch display panel comprises a display panel and a touch panel, the touch panel comprises a first electrode arranged on the display panel and arranged in a display area of the touch display panel, and the composition material of the first electrode comprises photosensitive silver paste material. According to the scheme, the first electrode is made of the photosensitive silver paste material, so that the film quality characteristic of a formed film caused by the use of a common metal material for preparing the first electrode is poor, the OLED packaging structure is damaged, and a series of risks such as peeling of an OLED device layer, an encapsulating layer and a touch layer are avoided.
The touch display panel and the manufacturing method thereof provided by the embodiment of the present application are described in detail above, and a specific example is applied to illustrate the principle and the embodiment of the present application, and the description of the embodiment is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (9)
1. A touch display panel, the touch display panel including a display area, the touch display panel including a display panel and a touch panel, the touch panel comprising:
the first electrode is arranged in the display area and arranged on the display panel, and the first electrode is made of photosensitive silver paste materials;
the interface layer is at least arranged between the display panel and the first electrode, and the composition material of the interface layer comprises silicon oxide or amorphous silicon.
2. The touch display panel according to claim 1, wherein the photosensitive silver paste material comprises a plurality of silver particles, the silver particles are spherical, the diameter of the silver particles is not greater than 1 micron, and the silver particles comprise a silver phosphate.
3. The touch display panel according to claim 1, wherein the touch panel further comprises:
the second electrode is arranged on one side, far away from the display panel, of the first electrode, and the composition material of the second electrode is the same as that of the first electrode.
4. The touch display panel according to claim 3, wherein the second electrode intersects with the first electrode, the touch panel further comprising:
the composite layer is arranged between the first electrode and the second electrode, the composite layer is at least arranged opposite to the intersection of the first electrode and the second electrode, the composite layer comprises an insulating layer, and the insulating layer is made of at least one of silicon nitride and silicon oxynitride.
5. The touch display panel according to claim 4, wherein the composite layer further comprises a first interface layer and a second interface layer, the first interface layer and the second interface layer are disposed on both sides of the insulating layer, and the first interface layer and the second interface layer are made of silicon oxide or amorphous silicon.
6. The touch display panel of claim 4, wherein the first electrode comprises:
the two first electrode parts and the second electrode are arranged on the same layer, and the two first electrode parts are arranged on two sides of the second electrode;
a bridge portion disposed opposite an intersection of the first electrode and the second electrode, the bridge portion including:
the bridge body is arranged between the two first electrode parts and arranged on one side of the composite layer close to the display panel,
two bridge ends respectively arranged at two sides of the bridge body and respectively connected with the bridge body
The bridge body and the two first electrode parts are connected.
7. The touch display panel according to claim 6, wherein a cross-sectional view of the bridge body along the vertical direction is a trapezoid, and an included angle between two oblique sides and a bottom side of the trapezoid is less than 45 °.
8. The touch display panel according to claim 1, wherein the touch display panel further includes a non-display area disposed around the display area, the touch panel further comprising:
the first electrodes are arranged in parallel;
the first electrode bus is arranged in the non-display area and electrically connected with the plurality of first electrodes, and the composition material of the first electrode bus is the same as that of the first electrodes.
9. A method for manufacturing a touch display panel according to any one of claims 1 to 8, the touch display panel including a display area, the method comprising:
providing a display panel;
forming an interface layer on one side of the display panel, wherein the interface layer comprises silicon oxide or amorphous silicon;
the display panel with the region that the display area corresponds just in the boundary layer is kept away from one side of display panel forms first electrode through lithography process, the boundary layer is located at least display panel with between the first electrode, the component material of first electrode includes sensitization silver thick liquid material.
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| CN105045429A (en) * | 2015-08-18 | 2015-11-11 | 蓝思科技（长沙）有限公司 | Touch screen with a 3D (Three-dimensional) display function and manufacture method thereof |
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| WO2020111202A1 (en) * | 2018-11-28 | 2020-06-04 | ソニー株式会社 | Display device and electronic device |
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| KR20140054735A (en) * | 2012-10-29 | 2014-05-09 | 삼성전기주식회사 | Touch panel and producing method thereof |
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| JP2016099767A (en) * | 2014-11-20 | 2016-05-30 | 日立化成株式会社 | Capacitive touch panel |
| CN104966544A (en) * | 2015-05-26 | 2015-10-07 | 富泰华工业（深圳）有限公司 | Photosensitive silver paste and touch screen and electronic apparatus employing photosensitive silver paste |
| CN105045429A (en) * | 2015-08-18 | 2015-11-11 | 蓝思科技（长沙）有限公司 | Touch screen with a 3D (Three-dimensional) display function and manufacture method thereof |
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