CN109585502B - Substrate for ink-jet printing and manufacturing method thereof - Google Patents
Substrate for ink-jet printing and manufacturing method thereof Download PDFInfo
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- CN109585502B CN109585502B CN201811250882.1A CN201811250882A CN109585502B CN 109585502 B CN109585502 B CN 109585502B CN 201811250882 A CN201811250882 A CN 201811250882A CN 109585502 B CN109585502 B CN 109585502B
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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
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention provides a substrate for ink-jet printing. The substrate for inkjet printing includes a base plate and a pixel defining layer disposed on the base plate, the pixel defining layer including at least a siloxane-or fluorine-containing oligomer. The pixel defining layer has different hydrophilicity and hydrophobicity from top to bottom, so that the problem of color mixing between adjacent pixels in the ink-jet printing process is solved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a display technology, in particular to a substrate for ink-jet printing and a manufacturing method thereof.
[ background of the invention ]
With the rapid development of display technologies, Quantum Dot (QD) and Organic Light Emitting Diode (OLED) displays each have unique superior performance, and can be used as technologies for next-generation displays. In the manufacturing process of either the quantum dot or the OLED display, an inkjet printing (IJP) technique is generally used to form the light emitting layer. This is because, compared to the conventional Liquid Crystal Display (LCD) manufacturing process which uses a coating method to form the light emitting layer, the inkjet printing can significantly avoid material waste, save material cost and production cost. Therefore, the wide application of inkjet printing technology is undoubtedly a research focus of current display technology.
However, for the fabrication of QD and OLED displays, the process of forming a light emitting layer using inkjet printing is still not fully developed, and there are many problems to be solved, one of which is that a droplet is liable to fall on a pixel defining layer (i.e., bank) between adjacent pixels, which may easily cause confusion of different colored QDs or light emitting materials between adjacent pixels, so that color mixing is liable to be formed, affecting color purity.
Therefore, it is necessary to provide a substrate for inkjet printing and a method for manufacturing the same to solve the problem of color mixing between adjacent pixels in the inkjet printing process in the prior art.
[ summary of the invention ]
The invention aims to provide a substrate for ink-jet printing and a manufacturing method thereof, so as to solve the problem of color mixing between adjacent pixels in the ink-jet printing process.
In order to solve the above technical problems, the present invention provides a substrate for inkjet printing. The substrate for inkjet printing includes:
a base plate; and
a pixel defining layer disposed on the base substrate, the pixel defining layer including at least a siloxane-containing oligomer represented by formula (I), and a concentration of the siloxane-containing oligomer in the pixel defining layer gradually decreasing from a top surface to a bottom surface of the pixel defining layer,
wherein R1 and R2 are one or more of polystyrene, bisphenol A polycarbonate, polymethyl methacrylate, nylon 6 and polyurethane,
r1 and R2 are the same or different,
n is 1 to 30.
In a preferred embodiment of the present invention, the material of the bottom plate is glass or polyethylene terephthalate, or the top of the bottom plate includes a silicon nitride layer.
In a preferred embodiment of the present invention, the pixel defining layer is formed by solution hardening and patterning a photopolymer material.
In a preferred embodiment of the present invention, the polystyrene has a repeating unit represented by chemical formula (II),
the bisphenol A polycarbonate has a repeating unit represented by the chemical structural formula (III),
the polycarbonate has a repeating unit represented by the chemical structural formula (IV),
the polymethyl methacrylate has a repeating unit represented by the chemical structural formula (V),
the nylon 6 has a repeating unit represented by the chemical structural formula (VI),
the polyurethane has a repeating unit represented by the chemical structural formula (VII),
wherein m is a number from 1 to 30,
r is an aliphatic group, an aromatic group, or an aliphatic-aromatic group.
In a preferred embodiment of the present invention, the substrate is used to form an organic light emitting diode display panel, and the pixel defining layer is used to define pixels of the organic light emitting diode display panel.
The present invention also provides a method of making a substrate for ink jet printing. The method for manufacturing the substrate for ink-jet printing comprises the following steps:
providing a bottom plate;
coating a photosensitive polymeric material solution on the bottom plate;
hardening and patterning the photosensitive polymeric material solution to form a pixel defining layer including at least a siloxane-containing oligomer represented by the general formula (I), and after the hardening and patterning step, the concentration of the siloxane-containing oligomer in the pixel defining layer is gradually decreased from the top surface to the bottom surface of the pixel defining layer,
wherein R1 and R2 are one or more of polystyrene, bisphenol A polycarbonate, polymethyl methacrylate, nylon 6 and polyurethane,
r1 and R2 are the same or different,
n is 1 to 30.
In a preferred embodiment of the present invention, the material of the bottom plate is glass or polyethylene terephthalate, or the top of the bottom plate includes a silicon nitride layer.
In a preferred embodiment of the present invention, the hardening and patterning step includes pre-baking, exposing, developing and post-baking the photopolymer material solution.
In a preferred embodiment of the present invention, the polystyrene has a repeating unit represented by chemical formula (II),
the bisphenol A polycarbonate has a repeating unit represented by the chemical structural formula (III),
the polycarbonate has a repeating unit represented by the chemical structural formula (IV),
the polymethyl methacrylate has a repeating unit represented by the chemical structural formula (V),
the nylon 6 has a repeating unit represented by the chemical structural formula (VI),
the polyurethane has a repeating unit represented by the chemical structural formula (VII),
wherein m is a number from 1 to 30,
r is an aliphatic group, an aromatic group, or an aliphatic-aromatic group.
In a preferred embodiment of the present invention, the substrate is used to form an organic light emitting diode display panel, and the pixel defining layer is used to define pixels of the organic light emitting diode display panel.
Compared with the prior art, the substrate for inkjet printing and the manufacturing method thereof provided by the invention have the advantages that the siloxane-containing oligomer is added into the photosensitive polymer material solution for forming the pixel defining layer as a modified material, so that after the pixel defining layer is formed on the substrate, the concentration of the siloxane-containing oligomer in the pixel defining layer is gradually reduced from the top surface to the bottom surface of the pixel defining layer, and therefore, the pixel defining layer has different hydrophilicity and hydrophobicity from top to bottom, and the problem of color mixing between adjacent pixels in the inkjet printing process is solved.
[ description of the drawings ]
Fig. 1 is a schematic flow diagram of a method of making a substrate for inkjet printing according to the present invention.
Fig. 2 is a schematic cross-sectional view of a substrate for inkjet printing according to the present invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
The invention provides a substrate for ink-jet printing and a manufacturing method thereof.A siloxane-containing oligomer is used as a modified material and added into a photosensitive polymer material solution for forming a pixel defining layer, so that after the pixel defining layer is formed on the substrate, the concentration of the siloxane-containing oligomer in the pixel defining layer is gradually reduced from the top surface to the bottom surface of the pixel defining layer, and the pixel defining layer has different hydrophilicity and hydrophobicity from top to bottom, thereby solving the problem of color mixing between adjacent pixels in the ink-jet printing process.
The invention provides a method for manufacturing a substrate for ink-jet printing. Referring to fig. 1, fig. 1 is a flow chart illustrating a method for manufacturing a substrate for inkjet printing according to the present invention. As shown in fig. 1, the method of fabricating a substrate for inkjet printing of the present invention includes the steps of:
in step S21, providing a base plate;
in step S22, a photopolymer solution is coated on the base plate;
hardening and patterning the photosensitive polymeric material solution to form a pixel defining layer including at least a siloxane-containing oligomer represented by the general formula (I), and after the hardening and patterning, a concentration of the siloxane-containing oligomer in the pixel defining layer is gradually decreased from a top surface to a bottom surface of the pixel defining layer in step S23,
wherein R1 and R2 are one or more of polystyrene, bisphenol A polycarbonate, polymethyl methacrylate, nylon 6 and polyurethane,
r1 and R2 are the same or different,
n is 1 to 30.
According to the present invention, the polystyrene has a repeating unit represented by chemical formula (II),
the bisphenol A polycarbonate has a repeating unit represented by the chemical structural formula (III),
the polycarbonate has a repeating unit represented by the chemical structural formula (IV),
the polymethyl methacrylate has a repeating unit represented by the chemical structural formula (V),
the nylon 6 has a repeating unit represented by the chemical structural formula (VI),
the polyurethane has a repeating unit represented by the chemical structural formula (VII),
wherein m is a number from 1 to 30,
r is an aliphatic group, an aromatic group, or an aliphatic-aromatic group.
The substrate may be, for example, for forming an organic light emitting diode display panel. In addition, the pixel defining layer is used for defining pixels of the organic light emitting diode display panel.
Preferably, the material of the bottom plate 11 is glass or polyethylene terephthalate, or the top of the bottom plate 11 includes a silicon nitride layer. However, the present invention is not limited thereto as long as the bottom plate can support the pixel defining layer and can have electronic elements formed thereon.
In accordance with the present invention, the pixel defining layer 12 is formed by hardening and patterning a solution of a photopolymer material.
More specifically, the process of forming the pixel defining layer includes coating a photopolymer solution on the substrate 11, wherein the photopolymer solution includes a siloxane-containing or fluorine-containing oligomer.
The photopolymer solution can, for example, include the following components:
17.8 to 20.7 vol% carbon black;
4.1-3.5 vol% of a dispersant;
5.7-7.3 vol% of a polymer resin (e.g., an acrylic resin);
1.0 to 5.0 vol% of a siloxane-containing or fluorine-containing oligomer;
1.8-2.3 vol% monomer;
0.8-1.1 vol% of a photoinitiator;
2-2.4 vol% of an additive; and
59.9-63.7 vol% of solvent.
Then, the photosensitive polymer material solution is subjected to pre-baking, exposure, development and post-baking to form the pixel defining layer.
Because the siloxane-or fluorine-containing oligomer has a low surface energy before exposure, even at low volume concentrations, the siloxane-or fluorine-containing oligomer tends to distribute over the surface layer due to thermal motion to minimize the overall energy of the system. Thus, when the photopolymer solution is exposed to ultraviolet light, a siloxane-or fluorine-containing oligomer is copolymerized with a polymer such as polystyrene, bisphenol a polycarbonate, polymethyl methacrylate, nylon 6, polyurethane, etc., to obtain a siloxane-based surface.
After exposure, the siloxane-or fluorine-containing oligomer is distributed primarily on the top surface of the film layer, which may be rendered hydrophobic due to the hydrophobic nature of the siloxane. The amount of the siloxane-or fluorine-containing oligomer gradually decreases from the top surface to the bottom surface of the film layer, forming a ladder structure having different affinity from the top to the bottom of the film layer.
After exposure, development is performed, and the portions of the film layer not exposed to the ultraviolet light are removed by development. The amount of the siloxane or fluorine-containing oligomer gradually decreases from the top surface to the bottom surface of the film, and the relative polymer resin content gradually increases from the top surface to the bottom surface of the film; thus, the side surface of the membrane layer is more hydrophobic nearer the top of the membrane layer and more hydrophilic nearer the bottom of the membrane layer.
Finally, the pixel defining layer is formed through post-baking, the top surface of the pixel defining layer has hydrophobicity, and the side surface of the pixel defining layer has hydrophilicity. Therefore, in the ink-jet printing process, due to the hydrophobic effect of the top surface of the pixel defining layer and the hydrophilic property of the side surface of the pixel defining layer, the stagnation of the liquid drops of the QDs or the luminescent materials on the pixel defining layer can be reduced, thereby avoiding the problems of the confusion and the color mixing of the QDs or the luminescent materials with different colors between adjacent pixels.
The invention also provides a substrate for ink-jet printing. Referring to fig. 2, fig. 2 is a schematic cross-sectional view illustrating a substrate for inkjet printing according to the present invention. As shown in fig. 2, the substrate 1 for inkjet printing of the present invention includes:
a base plate 11; and
a pixel defining layer 12 disposed on the base substrate 11, the pixel defining layer 12 including at least a siloxane-containing oligomer represented by the general formula (I), and a concentration of the siloxane-containing oligomer in the pixel defining layer 12 gradually decreasing from a top surface 121 to a bottom surface 122 of the pixel defining layer 12,
wherein R1 and R2 are one or more of polystyrene, bisphenol A polycarbonate, polymethyl methacrylate, nylon 6 and polyurethane,
r1 and R2 are the same or different,
n is 1 to 30.
According to the present invention, the polystyrene has a repeating unit represented by chemical formula (II),
the bisphenol A polycarbonate has a repeating unit represented by the chemical structural formula (III),
the polycarbonate has a repeating unit represented by the chemical structural formula (IV),
the polymethyl methacrylate has a repeating unit represented by the chemical structural formula (V),
the nylon 6 has a repeating unit represented by the chemical structural formula (VI),
the polyurethane has a repeating unit represented by the chemical structural formula (VII),
wherein m is a number from 1 to 30,
r is an aliphatic group, an aromatic group, or an aliphatic-aromatic group.
The substrate may be, for example, for forming an organic light emitting diode display panel. In addition, the pixel defining layer is used for defining pixels of the organic light emitting diode display panel.
Preferably, the material of the bottom plate 11 is glass or polyethylene terephthalate, or the top of the bottom plate 11 includes a silicon nitride layer. However, the present invention is not limited thereto as long as the bottom plate can support the pixel defining layer and can have electronic elements formed thereon.
In accordance with the present invention, the pixel defining layer 12 is formed by hardening and patterning a solution of a photopolymer material. In addition, the concentration of the siloxane-containing oligomer in the pixel defining layer 12 is gradually decreased from the top surface 121 to the bottom surface 122 of the pixel defining layer 12.
More specifically, the process of forming the pixel defining layer includes first coating a photopolymer solution on the substrate 11, wherein the photopolymer solution includes a siloxane-or fluorine-containing polymer segment; then, the photopolymer material solution is pre-baked, exposed, developed, and post-baked. After the pixel defining layer is formed, the concentration of the siloxane-containing oligomer in the pixel defining layer is gradually decreased from the top surface to the bottom surface of the pixel defining layer.
Compared with the prior art, the substrate for inkjet printing and the manufacturing method thereof provided by the invention have the advantages that the siloxane or fluorine-containing oligomer is added into the photosensitive polymer material solution for forming the pixel defining layer as a modified material, so that after the pixel defining layer is formed on the substrate, the concentration of the siloxane or fluorine-containing oligomer in the pixel defining layer is gradually reduced from the top surface to the bottom surface of the pixel defining layer, and the pixel defining layer has different hydrophilicity and hydrophobicity from top to bottom, so that the problem of color mixing between adjacent pixels in the inkjet printing process is solved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A substrate for inkjet printing, comprising:
a base plate; and
a pixel defining layer disposed on the base substrate, the pixel defining layer including at least a siloxane-containing oligomer represented by formula (I), and a concentration of the siloxane-containing oligomer in the pixel defining layer gradually decreasing from a top surface to a bottom surface of the pixel defining layer,
wherein R1 and R2 are one or more of polystyrene, bisphenol A polycarbonate, polymethyl methacrylate, nylon 6 and polyurethane,
r1 and R2 are the same or different,
n is 1 to 30.
2. The substrate for inkjet printing according to claim 1 wherein the material of the base plate is glass or polyethylene terephthalate, or the top of the base plate comprises a silicon nitride layer.
3. The substrate for inkjet printing according to claim 1,
the pixel defining layer is formed by hardening and patterning a solution of a photosensitive polymeric material.
4. The substrate for inkjet printing according to claim 1, wherein the polystyrene has a repeating unit represented by chemical structural formula (II),
the bisphenol A polycarbonate has a repeating unit represented by the chemical structural formula (III),
the polycarbonate has a repeating unit represented by the chemical structural formula (IV),
the polymethyl methacrylate has a repeating unit represented by the chemical structural formula (V),
the nylon 6 has a repeating unit represented by the chemical structural formula (VI),
the polyurethane has a repeating unit represented by the chemical structural formula (VII),
wherein m is a number from 1 to 30,
r is an aliphatic group, an aromatic group, or an aliphatic-aromatic group.
5. The substrate of claim 1, wherein the substrate is configured to form an OLED display panel, and the pixel defining layer is configured to define pixels of the OLED display panel.
6. A method of making a substrate for ink jet printing, comprising the steps of:
providing a bottom plate;
coating a photosensitive polymeric material solution on the bottom plate;
hardening and patterning the photosensitive polymeric material solution to form a pixel defining layer including at least a siloxane-containing oligomer represented by the general formula (I), and after the hardening and patterning step, the concentration of the siloxane-containing oligomer in the pixel defining layer is gradually decreased from the top surface to the bottom surface of the pixel defining layer,
wherein R1 and R2 are one or more of polystyrene, bisphenol A polycarbonate, polymethyl methacrylate, nylon 6 and polyurethane,
r1 and R2 are the same or different,
n is 1 to 30.
7. The method of claim 6, wherein the substrate is made of glass or polyethylene terephthalate, or the top of the substrate comprises a silicon nitride layer.
8. The method of claim 6, wherein the hardening and patterning step comprises pre-baking, exposing, developing, and post-baking the photopolymer solution.
9. The method of making a substrate for inkjet printing according to claim 6, the polystyrene having a repeating unit represented by chemical structural formula (II),
the bisphenol A polycarbonate has a repeating unit represented by the chemical structural formula (III),
the polycarbonate has a repeating unit represented by the chemical structural formula (IV),
the polymethyl methacrylate has a repeating unit represented by the chemical structural formula (V),
the nylon 6 has a repeating unit represented by the chemical structural formula (VI),
the polyurethane has a repeating unit represented by the chemical structural formula (VII),
wherein m is a number from 1 to 30,
r is an aliphatic group, an aromatic group, or an aliphatic-aromatic group.
10. The method of claim 6, wherein the substrate is used to form an OLED display panel, and the pixel defining layer is used to define pixels of the OLED display panel.
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| CN110233170B (en) | 2019-06-21 | 2021-10-12 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
| CN111223901B (en) * | 2019-11-29 | 2022-07-29 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof |
| CN111081745A (en) * | 2019-12-16 | 2020-04-28 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN112209724B (en) * | 2020-09-24 | 2021-07-27 | 西安交通大学 | Shape-preserving drying method for 3D printing direct-writing formed ceramic blank |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |