CN116390610A - Ink-jet printing display substrate and preparation method thereof - Google Patents
Ink-jet printing display substrate and preparation method thereof Download PDFInfo
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- CN116390610A CN116390610A CN202310578577.XA CN202310578577A CN116390610A CN 116390610 A CN116390610 A CN 116390610A CN 202310578577 A CN202310578577 A CN 202310578577A CN 116390610 A CN116390610 A CN 116390610A
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- 239000000758 substrate Substances 0.000 title claims abstract description 114
- 238000007641 inkjet printing Methods 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000002904 solvent Substances 0.000 claims abstract description 32
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 12
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 24
- 239000011521 glass Substances 0.000 claims description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- XSIFPSYPOVKYCO-UHFFFAOYSA-N butyl benzoate Chemical compound CCCCOC(=O)C1=CC=CC=C1 XSIFPSYPOVKYCO-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 claims description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 2
- 238000007639 printing Methods 0.000 abstract description 11
- 238000003892 spreading Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000000976 ink Substances 0.000 description 36
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 7
- BTVWZWFKMIUSGS-UHFFFAOYSA-N dimethylethyleneglycol Natural products CC(C)(O)CO BTVWZWFKMIUSGS-UHFFFAOYSA-N 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 239000011787 zinc oxide Substances 0.000 description 6
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
- H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing
-
- 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
-
- 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
-
- 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
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/15—Deposition of organic active material using liquid deposition, e.g. spin coating characterised by the solvent used
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides an ink-jet printing display substrate and a preparation method thereof, wherein the preparation method comprises the steps of (1) cooling the substrate; (2) Standing the cooled substrate in the chamber for a period of time; (3) Performing ink-jet printing on the substrate after standing to obtain the ink-jet printing display substrate; the chamber in the step (2) is filled with saturated steam of ink solvent for ink-jet printing; according to the preparation method, the substrate is cooled, and the cooled substrate is placed in the chamber filled with saturated steam of the ink solvent for ink jet printing for a period of time, so that the ink solvent for ink jet printing can form a liquid film on the substrate in advance before printing, ink can be uniformly spread on the substrate in the subsequent ink jet printing process, and the problems of uneven ink spreading and poor film forming quality in the ink jet printing process are solved.
Description
Technical Field
The invention belongs to the technical field of ink-jet printing, and particularly relates to an ink-jet printing display substrate and a preparation method thereof.
Background
The ink jet printing is a film forming mode of spraying ink containing functional materials on corresponding positions of a substrate drop by drop as required under the control of a computer and forming patterns, has the advantages of simplicity in operation, non-contact, no mask, low equipment cost, high material utilization rate and the like, and is considered to be an effective way for realizing the preparation of the flexible large-area OLED/QLED display substrate.
In recent years, the preparation of display screens by ink-jet printing has been widely concerned and developed, but the uniformity of the printed film is still a key issue. In the inkjet printing process, particularly in printing large-size substrates, the inkjet printhead needs to reciprocate for a plurality of times along the printing direction to fully spread ink in pixels on the whole substrate, so that the drying time and the drying atmosphere of the ink printed successively have great difference, and the drying of the ink on the substrate is uneven. Further, the printed ink often accompanies the coffee ring phenomenon during the drying process, forming uneven films with thick sides and thin middle, and the uneven printed films and coffee ring phenomenon during the printing process and the drying process seriously reduce the performance and display effect of the display. The method comprises the following steps: (1) Regulating the chemical and composition of the ink, such as adding surfactant, dodecyl mercaptan, high boiling point low surface tension solvent, polymer gel and even changing the shape of solute; (2) Substrate treatment, such as surface hydrophobicity, substrate cooling, pre-patterning, and electrowetting; (3) Auxiliary devices such as capillary tips incorporating evaporation shields with micro-holes and dipping into droplets; (4) Fast curing, such as controlling the curing time to the millisecond or even microsecond level by photon sintering techniques.
CN108944103a discloses an inkjet printing method comprising the steps of: cooling the substrate to T1; printing functional ink on the cooled substrate in an inkjet mode to form an ink film; placing the printed substrate at the temperature of T2, vacuumizing and drying to obtain a solid film; carrying out heat treatment on the solid film to finish crosslinking and curing; wherein, the melting point of the ink is less than T1 and less than T2 and less than room temperature. The ink-jet printing method reduces the phenomenon of uneven film formation in the printing process, reduces the generation of coffee rings, and improves the uniformity of film formation of pixels in each pixel. The ink-jet printing method provided by the invention can reduce the phenomenon of uneven film formation in the printing process; however, the inkjet printing method provided by the invention needs to strictly control the temperature of T1 and T2, has a complex process, and is not suitable for industrial production.
Therefore, developing a preparation method of an ink-jet printing display substrate with uniform ink spreading and good film forming property is a technical problem which needs to be solved in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an ink-jet printing display substrate and a preparation method thereof, wherein the preparation method ensures that solvent vapor of ink used for ink-jet printing can be condensed on the substrate to form a liquid film, so that the ink in the ink-jet printing process can be uniformly spread on the display substrate, and the film forming property is good.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for preparing an inkjet printed display substrate, the method comprising the steps of:
(1) Cooling the substrate;
(2) Standing the cooled substrate in the chamber for a period of time, and taking out;
(3) Performing ink-jet printing on the substrate after standing to obtain the ink-jet printing display substrate;
and (3) filling the chamber in the step (2) with saturated steam of an ink solvent for ink-jet printing.
According to the preparation method of the ink-jet printing display substrate, firstly, the substrate is cooled, the cooled substrate is placed in the cavity for a period of time, saturated steam of ink solvent for ink-jet printing is filled in the cavity, the solvent steam can be condensed on the cooled substrate, so that a liquid film can be formed on the substrate in advance by the solvent of the ink for ink-jet printing before printing, even spreading of the ink on the substrate in the ink-jet printing process is facilitated, and the ink-jet printing display substrate with good film forming quality is obtained.
The filling method of the saturated steam filled in the chamber is not particularly limited, and the filling may be performed by a pipe as an example.
Preferably, the temperature of the cooled substrate of step (1) is not higher than 0 ℃, e.g. -1 ℃, -2 ℃, -3 ℃, -4 ℃, -5 ℃, -6 ℃, -7 ℃, -8 ℃ or-9 ℃ and the like.
Preferably, the substrate comprises a flexible substrate or a rigid substrate.
Preferably, the rigid substrate comprises glass.
Preferably, the time of the standing in the step (2) is 1 to 30s, for example, 2s, 4s, 6s, 8s, 10s, 12s, 14s, 16s, 18s, 20s, 22s, 24s, 26s or 28s, etc.
As a preferable technical scheme of the invention, the solvent can form a liquid film on the substrate in advance in the standing time, and the formed liquid film cannot be too thick to influence the printing effect if the standing time is too long.
Preferably, the solvent includes any one or a combination of at least two of an alcohol solvent, an ester solvent and an ether solvent.
Preferably, the solvent comprises any one or a combination of at least two of ethylene glycol, isopropanol, butyl benzoate, ethyl acetate, ethylene glycol monoethyl ether or ethylene glycol monomethyl ether.
Preferably, the method of inkjet printing in step (2) is piezo inkjet printing, electrostatic inkjet printing or thermal bubble inkjet printing.
As a preferable technical scheme, the preparation method specifically comprises the following steps:
(1) Cooling the substrate to not higher than 0 ℃;
(2) Standing the substrate at the temperature of not higher than 0 ℃ in a chamber for 1-30 seconds, and filling saturated steam of a solvent in ink used for ink-jet printing in the chamber;
(3) And performing ink-jet printing on the substrate after standing to obtain the ink-jet printing display substrate.
In a second aspect, the present invention provides an inkjet printed display substrate prepared by the preparation method according to the first aspect.
Compared with the prior art, the invention has the following beneficial effects:
the preparation method of the ink-jet printing display substrate provided by the invention comprises the following steps: (1) cooling the substrate; (2) Standing the cooled substrate in the chamber for a period of time; (3) Performing ink-jet printing on the substrate after standing to obtain the ink-jet printing display substrate; the chamber in the step (2) is filled with saturated steam of ink solvent for ink-jet printing; according to the preparation method, the substrate is cooled, and the cooled substrate is placed in the chamber filled with saturated steam of the ink solvent for ink jet printing for a period of time, so that the ink solvent for ink jet printing can form a liquid film on the substrate in advance before printing, ink can be uniformly spread on the substrate in the subsequent ink jet printing process, and the problems of uneven ink spreading and poor film forming quality in the ink jet printing process are solved.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
Example 1
A method of preparing an inkjet printed display substrate comprising the steps of:
(1) Cooling the common glass substrate to 0 ℃;
(2) Standing the common glass substrate cooled to 0 ℃ in a chamber for 15 seconds, wherein saturated steam of isopropanol is filled in the chamber;
(3) And (3) performing ink-jet printing (the solvent of the ink used for ink-jet printing is isopropanol, dimethyl sulfoxide and ethylene glycol with the volume ratio of 6:2:2, and zinc oxide with the concentration of 30 mg/mL) on the ordinary glass substrate after standing to obtain the ink-jet printing display substrate.
Example 2
A method of preparing an inkjet printed display substrate comprising the steps of:
(1) Cooling the common glass substrate to-5 ℃;
(2) Standing the common glass substrate cooled to the temperature of minus 5 ℃ in a chamber for 20 seconds, wherein the chamber is filled with saturated steam of isopropanol;
(3) And performing ink-jet printing on the ordinary glass substrate after standing (the solvent of the ink used for ink-jet printing is isopropanol, dimethyl sulfoxide and ethylene glycol with the volume ratio of 6:2:2, and zinc oxide with the concentration of 30mg/mL is also included), so as to obtain the ink-jet printing display substrate.
Example 3
A method of preparing an inkjet printed display substrate comprising the steps of:
(1) Cooling the common glass substrate to-10 ℃;
(2) Standing the common glass substrate cooled to the temperature of minus 5 ℃ for 30 seconds in a chamber, wherein saturated steam of isopropanol is filled in the chamber;
(3) And (3) performing ink-jet printing on the ordinary glass substrate after standing (the solvent of the ink used for ink-jet printing is isopropanol, dimethyl sulfoxide and ethylene glycol with the volume ratio of 6:2:2, and zinc oxide with the concentration of 30 mg/mL) to obtain the ink-jet printing display substrate.
Example 4
The preparation method of the ink-jet printing display substrate is different from example 1 only in that the standing time of step (2) is 1s, and other conditions, parameters and steps are the same as those of example 1.
Example 5
The preparation method of the ink-jet printing display substrate is different from example 1 only in that the standing time of step (2) is 30s, and other conditions, parameters and steps are the same as those of example 1.
Example 6
The preparation method of the ink-jet printing display substrate is different from example 1 only in that the standing time of step (2) is 40s, and other conditions, parameters and steps are the same as those of example 1.
Example 7
The preparation method of the ink-jet printing display substrate is different from the preparation method of the embodiment 1 only in that the temperature of the common glass substrate after the temperature is reduced in the step (1) is 5 ℃, and other conditions, parameters and steps are the same as those of the embodiment 1.
Comparative example 1
A method of preparing an inkjet printed display substrate comprising the steps of:
(1) Standing a common glass substrate in a chamber for 15s, wherein the chamber is filled with saturated steam of isopropanol;
(2) And (3) performing ink-jet printing on the ordinary glass substrate after standing (the solvent of the ink used for ink-jet printing is isopropanol, dimethyl sulfoxide and ethylene glycol with the volume ratio of 6:2:2, and zinc oxide with the concentration of 30 mg/mL) to obtain the ink-jet printing display substrate.
Comparative example 2
The preparation method of the ink-jet printing display substrate specifically comprises the following steps:
(1) Cooling the common glass substrate to 0 ℃;
(2) And (3) performing ink-jet printing (the solvent of the ink used for the ink-jet printing is isopropanol, dimethyl sulfoxide and ethylene glycol with the volume ratio of 6:2:2, and zinc oxide with the concentration of 30 mg/mL) on the common glass substrate cooled to 0 ℃ to obtain the ink-jet printing display substrate.
Comparative example 3
The process for preparing an ink-jet printed display substrate differs from example 1 only in that the chamber of step (2) is filled with saturated vapor of chlorobenzene, and other conditions and parameters are the same as in example 1.
Comparative example 4
A method of preparing an inkjet printed display substrate, the method comprising: and (3) performing ink-jet printing directly on a common glass substrate (the solvent of the ink used for the ink-jet printing is isopropanol, dimethyl sulfoxide and ethylene glycol with the volume ratio of 6:2:2, and zinc oxide with the concentration of 30 mg/mL) to obtain the ink-jet printing display substrate.
Performance test:
(1) Spreading uniformity: a visual printing device CCD is adopted to observe whether the ink on the common glass substrate spreads uniformly;
(2) Film formation uniformity: measuring the film thickness of a film layer formed after the ink on the common glass substrate is dried, and judging whether the dried film is uniform or not; the judgment criteria are as follows: film forming is considered to be quite uniform when the deviation of film thickness at different positions is less than or equal to 10%, film forming is considered to be relatively uniform when the deviation is more than 10% and less than or equal to 20%, and film forming is considered to be nonuniform when the deviation is more than 20%.
The inkjet printed display substrates finally obtained in examples 1 to 7 and comparative examples 1 to 4 were tested according to the above test methods, and the test results are shown in table 1:
TABLE 1
From the data in table 1, it can be seen that:
the ink on the ink-jet printing display substrate prepared by the preparation methods provided in examples 1 to 5 is well spread, and the uniformity of the ink after film formation is also good.
As can be seen from comparative example 1 and comparative examples 1 to 2, 4, the inks on the display substrates prepared without the step of lowering the temperature (comparative example 1), without the step of standing (comparative example 2), or without the step of lowering the temperature and without the step of standing (comparative example 4) were not only poor in uniformity of spreading but also poor in uniformity after film formation.
Further, it was found that the saturated vapor filled with other solvents (solvents other than those used for the inkjet printing ink) did not contribute to the uniformity of spreading of the ink on the resulting display substrate and the uniformity after film formation as well as in comparative example 1 and comparative example 3.
Finally, it was also found that the temperature of the reduced temperature and the time of the standing also affect the spreading and filming of the ink on the final inkjet printed substrate as compared with examples 1 and 6 to 7.
The applicant states that the present invention is described by way of the above embodiments as an inkjet printing display substrate and a method of manufacturing the same, but the present invention is not limited to the above embodiments, i.e., it is not meant that the present invention must be practiced in dependence upon the above embodiments. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of raw materials for the product of the present invention, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present invention and the scope of disclosure.
Claims (10)
1. A method of preparing an ink jet printed display substrate, the method comprising the steps of:
(1) Cooling the substrate;
(2) Standing the cooled substrate in the chamber for a period of time, and taking out;
(3) Performing ink-jet printing on the substrate after standing to obtain the ink-jet printing display substrate;
wherein the chamber of step (2) is filled with saturated vapor of a solvent of an ink for inkjet printing.
2. The method of claim 1, wherein the temperature of the cooled substrate in step (1) is not higher than 0 ℃.
3. The method of manufacturing according to claim 1 or 2, wherein the substrate comprises a flexible substrate or a rigid substrate.
4. The method of manufacturing according to claim 3, wherein the rigid substrate comprises glass.
5. The method according to any one of claims 1 to 4, wherein the time for the standing in the step (2) is 1 to 30 seconds.
6. The method according to any one of claims 1 to 5, wherein the solvent comprises any one or a combination of at least two of an alcohol solvent, an ester solvent and an ether solvent.
7. The method according to claim 6, wherein the solvent comprises any one or a combination of at least two of ethylene glycol, isopropanol, butyl benzoate, ethyl acetate, ethylene glycol monoethyl ether, and ethylene glycol monomethyl ether.
8. The method according to any one of claims 1 to 7, wherein the method of inkjet printing in step (3) is piezo inkjet printing, electrostatic inkjet printing or thermal bubble inkjet printing.
9. The preparation method according to any one of claims 1 to 8, characterized in that it comprises in particular the following steps:
(1) Cooling the substrate to not higher than 0 ℃;
(2) Standing the substrate at the temperature of not higher than 0 ℃ in a chamber for 1-30 seconds, and filling saturated steam of a solvent in ink used for ink-jet printing in the chamber;
(3) And performing ink-jet printing on the substrate after standing to obtain the ink-jet printing display substrate.
10. An inkjet printing display substrate, characterized in that the inkjet printing display substrate is prepared by the preparation method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310578577.XA CN116390610A (en) | 2023-05-22 | 2023-05-22 | Ink-jet printing display substrate and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310578577.XA CN116390610A (en) | 2023-05-22 | 2023-05-22 | Ink-jet printing display substrate and preparation method thereof |
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| CN116390610A true CN116390610A (en) | 2023-07-04 |
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| CN202310578577.XA Pending CN116390610A (en) | 2023-05-22 | 2023-05-22 | Ink-jet printing display substrate and preparation method thereof |
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| Country | Link |
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| CN (1) | CN116390610A (en) |
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