CN110120470B - Preparation method of flat film and array substrate - Google Patents
Preparation method of flat film and array substrate Download PDFInfo
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- CN110120470B CN110120470B CN201910396263.1A CN201910396263A CN110120470B CN 110120470 B CN110120470 B CN 110120470B CN 201910396263 A CN201910396263 A CN 201910396263A CN 110120470 B CN110120470 B CN 110120470B
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- glue solution
- polymer glue
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Abstract
The invention relates to the technical field of liquid crystal display, in particular to a preparation method of a flat film and an array substrate. The preparation method of the flat film comprises the following steps: coating a first polymer glue solution on a substrate to form a first flat film; coating a second polymer glue solution on the first flat membrane to form a second flat membrane; wherein, the solute in the first polymer glue solution is insoluble or insoluble in the solvent of the second polymer glue solution. In the preparation method of the flat film, when the second polymer glue solution is coated on the first flat film, the second polymer glue solution can not dissolve the solute in the first polymer glue solution, so that the flatness of the first flat film can not be affected or wrinkles can not be caused, the first flat film and the second flat film can form a more flat layer structure so as to meet the requirements of products on the flatness and the requirements of related use functions, and the flat film prepared by the method can be widely applied to the display or high-definition display fields of organic light-emitting diodes, liquid crystal display screens and the like.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a preparation method of a flat film and an array substrate.
Background
In an OLED (Organic light-emitting diode) display, a light-emitting region of a pixel of a bottom-emitting or top-emitting device overlaps with a metal trace on a bottom layer, and a difference in the length of the metal trace easily causes unevenness of a film layer of the light-emitting region, resulting in poor uniformity of light emission in the pixel, thereby affecting the overall efficiency and lifetime. Therefore, it is necessary to develop an ultra-flat film to cover unevenness caused by a step difference, and in actual development, a single-layer film layer SOG (Silicon On Glass, Silicon-Glass bonded structure) often does not achieve flatness required for a product.
Disclosure of Invention
The invention discloses a preparation method of a flat film and an array substrate, which are used for covering an uneven structure of a display device so as to improve the flatness of the display device.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of making a planar film, comprising:
coating a first polymer glue solution on a substrate to form a first flat film;
coating a second polymer glue solution on the first flat membrane to form a second flat membrane;
wherein the solute in the first polymer glue solution is insoluble or insoluble in the solvent of the second polymer glue solution.
In the preparation method of the flat film, as the solute in the first polymer glue solution is insoluble or insoluble in the solvent of the second polymer glue solution, when the second polymer glue solution is coated on the first flat film, the solute in the first polymer glue solution cannot be dissolved by the second polymer glue solution, so that the flatness of the first flat film cannot be influenced or wrinkles cannot be caused, the first flat film and the second flat film can form a more flat layer structure to meet the requirements of products on the flatness and the requirements of related use functions, and the flat film prepared by the preparation method can be widely applied to the display or high-definition display fields of organic light-emitting diodes, liquid crystal display screens and the like.
Optionally, the coating a first polymer glue solution on a substrate to form a first flat film includes:
coating the first polymer glue solution on the substrate base plate;
and drying the first polymer glue solution to form the first flat film.
Optionally, the drying temperature is 100 ℃ and the drying time is 1 h.
Optionally, the coating a second polymer glue solution on the first flat film to form a second flat film comprises:
coating the second polymer glue solution on the first flat membrane;
and drying the second polymer glue solution to form the second flat film.
Optionally, the drying temperature is 100 ℃ and the drying time is 0.5 h.
Optionally, the solute in the first polymer glue solution and the solute in the second polymer glue solution are polymers of the same monomer, and the polymerization degree of the solute in the first polymer glue solution is greater than that of the solute in the second polymer glue solution.
Alternatively, the monomer is dimethylsiloxane, imide, methyl methacrylate, propylene glycol monomethyl ether acetate, butyrolactone, or styrene.
Optionally, the polymerization degree of the solute in the first polymer glue solution is 100000-1000000, and the polymerization degree of the solute in the second polymer glue solution is 1000-20000.
Optionally, the solvent in the first polymer glue solution is chloroform, chlorobenzene, tetrahydrofuran, methyl formate, tributylamine, methyl ethyl ketone, ethyl acetate, trioctylamine, dimethyl carbonate, diethyl ether, isopropyl ether, n-butyl ether, trichloroethylene or diphenyl ether;
the solvent in the second polymer glue solution is ethanol, ethylene glycol, dichloromethane, hexamethylphosphoramide, acetic acid, isopropanol, pyridine, acetone or n-butanol.
An array substrate, comprising: the device comprises a substrate base plate, a plurality of semiconductor chips and a plurality of semiconductor chips, wherein components are arranged on the substrate base plate;
one side of the substrate base plate, on which the component is arranged, is provided with a flat film prepared by any one of the preparation methods of the flat film provided by the technical scheme.
Drawings
FIG. 1 is a schematic flow chart of a method for fabricating a planarization film according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a process for preparing a first planarization film in a planarization film preparation method according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for manufacturing a second flat film according to an embodiment of the present invention;
fig. 4a to 4c are schematic structural changes of the array substrate prepared by the method for preparing a planarization film according to the 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.
As shown in fig. 1 to 3, an embodiment of the present invention provides a method for preparing a planarization film, including the following steps:
step S1: coating a first polymer glue solution on a substrate base plate 1 to form a first flat film 11;
step S2: coating a second polymer glue solution on the first flat membrane 11 to form a second flat membrane 12;
wherein, the solute in the first polymer glue solution is insoluble or insoluble relative to the solvent of the second polymer glue solution.
The first flat film 11 and the second flat film 12 form a two-layer flat structure, and through the formation of the two-layer flat structure, unevenness caused by components on the substrate base plate 1 can be eliminated, and the flatness of the whole structure is further improved.
Taking the preparation of the above-mentioned flat film on the array substrate as an example, the preparation process will be described in detail with reference to the structural changes of the array substrate in the preparation process of fig. 4a to 4 c. As shown in fig. 4a, a substrate 1 is provided; coating a first polymer glue solution on the substrate base plate 1 to form a first flat film 11 to obtain a structure shown in FIG. 4 b; coating a second polymer glue solution on the first flat membrane 11 to form a second flat membrane 12 to obtain a structure shown in FIG. 4 c; and then, carrying out a normal array substrate preparation method to prepare the array substrate meeting the requirement.
It should be noted that, before the preparation method, the first polymer glue solution and the second polymer glue solution need to be prepared, and the order of preparing the first polymer glue solution and the second polymer glue solution is not limited.
Because the solute in the first polymer glue solution is insoluble or insoluble in the solvent of the second polymer glue solution, when the second polymer glue solution is coated on the first flat membrane 11, the second polymer glue solution cannot dissolve the solute in the first polymer glue solution, and cannot influence or cause wrinkles on the flatness of the first flat membrane 11, the first flat membrane 11 and the second flat membrane 12 can form a more flat layer structure so as to meet the requirements of products on the flatness and related use functions, and the flat membrane prepared by the preparation method can be widely applied to the display or high-definition display fields of organic light-emitting diodes, liquid crystal display screens and the like.
Specifically, the solute in the first polymer glue solution and the solute in the second polymer glue solution are polymers of the same monomer, and the polymerization degree of the solute in the first polymer glue solution is greater than that of the solute in the second polymer glue solution.
For polymers, polymers of different molecular weights have different requirements on the solvency of the solvent. In this embodiment, the polymerization degree of the solute in the first polymer glue solution is greater than that of the solute in the second polymer glue solution, the molecular weight of the former is greater than that of the latter, and the solvent dissolving capacity of the first polymer glue solution is greater than that of the solvent of the second polymer glue solution, so that the solvent of the first polymer glue solution can dissolve the solute in the first polymer glue solution and also can dissolve the solute in the second polymer glue solution, but the solvent of the second polymer glue solution can only dissolve the solute in the second polymer glue solution and cannot dissolve the solute in the first polymer glue solution. After the first flat membrane 11 is prepared, the second polymer glue solution is coated on the surface of the first flat membrane 11, and the second polymer glue solution does not dissolve the first flat membrane 11, so that the first flat membrane 11 is not affected.
And the solute of the first polymer glue solution and the solute of the second polymer adopt the same monomer and polymers with different molecular weights, and can be obtained by simply changing the polymerization time when the two polymers are prepared, the preparation method is simple and easy to obtain, and the problem of the difference of the interface physical bonding compatibility between two flat membranes possibly existing in the use of different polymers is avoided.
As a specific embodiment, the first polymer glue solution solute and the second polymer glue solution solute are polymers of the same monomer, and the monomer can be a corresponding type of high molecular material monomer such as dimethyl siloxane, imide, methyl methacrylate, propylene glycol monomethyl ether acetate, butyrolactone, styrene, and the like.
Further, the polymerization degree of the solute in the first polymer glue solution is selected to be 100000-1000000, and the polymerization degree of the solute in the second polymer glue solution is selected to be 1000-20000.
The solvent dissolving capacity of the first polymer glue solution is larger than that of the second polymer glue solution, the solvent in the first polymer glue solution is strong organic solvent such as chloroform, chlorobenzene, tetrahydrofuran, methyl formate, tributylamine, methyl ethyl ketone, ethyl acetate, trioctylamine, dimethyl carbonate, diethyl ether, isopropyl ether, n-butyl ether, trichloroethylene, diphenyl ether and the like, and the solvent in the second polymer glue solution is weak organic solvent such as ethanol, ethylene glycol, dichloromethane, hexamethylphosphoramide, acetic acid, isopropanol, pyridine, acetone, n-butyl alcohol and the like.
On the basis of the above embodiment, as shown in fig. 2, the step of coating the first polymer glue solution on the base substrate 1 to form the first flat film 11 includes the following steps:
step S11: coating a first polymer glue solution on a substrate base plate 1; coating a first polymer glue solution on the surface of the substrate base plate 1 according to requirements, wherein the first polymer glue solution covers the surface of the substrate base plate 1.
Step S12: and drying the first polymer glue solution to form a first flat film 11.
Wherein, the drying temperature in the drying process of the step S12 is 100 ℃, and the drying time is 1 h.
In addition, as shown in fig. 3, the step of applying the second polymer glue solution on the first flat membrane 11 to form the second flat membrane 12 includes the steps of:
step S21: coating a second polymer glue solution on the first flat membrane 11; coating a first polymer glue solution on the surface of the first flat membrane 11 as required, wherein the first polymer glue solution covers the surface of the first flat membrane 11, which is far away from the substrate base plate 1.
Step S22: and drying the second polymer glue solution to form a second flat membrane 12. Wherein the projection of the first flat film 11 on the base substrate 1 covers the projection of the second flat film 12 on the base substrate 1.
Wherein, the drying temperature in the drying process of the step S22 is 100 ℃, and the drying time is 0.5 h.
Based on the same inventive concept, an embodiment of the present invention further provides an array substrate, where the array substrate includes: a substrate base plate 1, wherein components are arranged on the substrate base plate 1; the side of the base substrate 1 provided with the components is provided with a flat film prepared by any of the methods for preparing a flat film as provided in the above embodiments.
The method for preparing the flat film is described in detail above and will not be described herein. The array substrate provided by the embodiment has the flat film, has good flatness, is beneficial to uniformity of light emission in pixels, and improves the working efficiency and the service life of the array substrate.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A method of producing a flat film, comprising:
coating a first polymer glue solution on a substrate to form a first flat film;
coating a second polymer glue solution on the first flat membrane to form a second flat membrane;
wherein, the solute in the first polymer glue solution is insoluble or insoluble in the solvent of the second polymer glue solution;
the solute in the first polymer glue solution and the solute in the second polymer glue solution are polymers of the same monomer, and the polymerization degree of the solute in the first polymer glue solution is greater than that of the solute in the second polymer glue solution.
2. The method for preparing a flat film according to claim 1, wherein the step of coating a first polymer glue solution on a substrate to form a first flat film comprises:
coating the first polymer glue solution on the substrate base plate;
and drying the first polymer glue solution to form the first flat film.
3. The method of claim 2, wherein the baking temperature is 100 ℃ and the baking time is 1 hour.
4. The method for preparing a flat film according to claim 1, wherein the step of applying a second polymer glue solution on the first flat film to form a second flat film comprises:
coating the second polymer glue solution on the first flat membrane;
and drying the second polymer glue solution to form the second flat film.
5. The method of claim 4, wherein the baking temperature is 100 ℃ and the baking time is 0.5 h.
6. The method of claim 1, wherein the monomer is dimethylsiloxane, imide, methyl methacrylate, propylene glycol monomethyl ether acetate, butyrolactone, or styrene.
7. The method as claimed in claim 1, wherein the polymerization degree of the solute in the first polymer glue solution is 100000-1000000, and the polymerization degree of the solute in the second polymer glue solution is 1000-20000.
8. The method for preparing a planarization film according to any one of claims 1-7, wherein the solvent in the first polymer glue solution is chloroform, chlorobenzene, tetrahydrofuran, methyl formate, tributylamine, methyl ethyl ketone, ethyl acetate, trioctylamine, dimethyl carbonate, diethyl ether, isopropyl ether, n-butyl ether, trichloroethylene, or diphenyl ether;
the solvent in the second polymer glue solution is ethanol, ethylene glycol, dichloromethane, hexamethylphosphoramide, acetic acid, isopropanol, pyridine, acetone or n-butanol.
9. An array substrate, comprising: the device comprises a substrate base plate, a plurality of semiconductor chips and a plurality of semiconductor chips, wherein components are arranged on the substrate base plate;
the side of the base substrate on which the components are provided is provided with a planarization film produced by the method for producing a planarization film according to any one of claims 1 to 8.
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| KR100343080B1 (en) * | 1990-06-20 | 2002-12-28 | 다이니폰 인사츠 가부시키가이샤 | Color filter and its manufacturing method |
| CN1153277C (en) * | 2001-05-22 | 2004-06-09 | 华邦电子股份有限公司 | Grinding-flatening method for IC |
| CN101048884B (en) * | 2004-10-28 | 2010-12-15 | 皇家飞利浦电子股份有限公司 | Copolymer for charge transport layer in opto-electronic device |
| KR102135275B1 (en) * | 2013-07-29 | 2020-07-20 | 삼성디스플레이 주식회사 | Thin film transistor substrate, method of manufacturing the same and display device comprising the same |
| JP2017185724A (en) * | 2016-04-07 | 2017-10-12 | 凸版印刷株式会社 | Gas barrier film and organic electroluminescent device |
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