CN115078398A - Method for detecting surface defects of electronic display screen - Google Patents
Method for detecting surface defects of electronic display screen Download PDFInfo
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- CN115078398A CN115078398A CN202210655861.8A CN202210655861A CN115078398A CN 115078398 A CN115078398 A CN 115078398A CN 202210655861 A CN202210655861 A CN 202210655861A CN 115078398 A CN115078398 A CN 115078398A
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- 230000007547 defect Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000003851 corona treatment Methods 0.000 claims abstract description 35
- 238000002791 soaking Methods 0.000 claims abstract description 22
- 239000003960 organic solvent Substances 0.000 claims description 24
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- GNBHRKFJIUUOQI-UHFFFAOYSA-N fluorescein Chemical compound O1C(=O)C2=CC=CC=C2C21C1=CC=C(O)C=C1OC1=CC(O)=CC=C21 GNBHRKFJIUUOQI-UHFFFAOYSA-N 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 claims description 6
- 229940043267 rhodamine b Drugs 0.000 claims description 6
- VYXSBFYARXAAKO-WTKGSRSZSA-N chembl402140 Chemical compound Cl.C1=2C=C(C)C(NCC)=CC=2OC2=C\C(=N/CC)C(C)=CC2=C1C1=CC=CC=C1C(=O)OCC VYXSBFYARXAAKO-WTKGSRSZSA-N 0.000 claims description 4
- 238000003556 assay Methods 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000001917 fluorescence detection Methods 0.000 description 2
- 230000009916 joint effect Effects 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/91—Investigating the presence of flaws or contamination using penetration of dyes, e.g. fluorescent ink
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention provides a method for detecting surface defects of an electronic display screen, which comprises the following steps: sequentially carrying out corona treatment and fluorescent liquid soaking on the electronic display screen sample to obtain a pretreated electronic display screen sample; and then detecting the surface cracks of the pretreated electronic display screen sample by using a fluorescence microscope. The method for detecting the surface defect of the electronic display screen provided by the invention obviously improves the adhesiveness of the surface of the sample of the electronic display screen, and achieves the purpose of increasing the wettability and the adhesive force of the surface of the electronic display screen, so that the fluorescent liquid can be very easily infiltrated into the defect position to achieve the purpose of fluorescent positioning.
Description
Technical Field
The invention belongs to the technical field of semiconductor packaging, and particularly relates to a method for detecting surface defects of an electronic display screen.
Background
In the packaging process of electronic display screens, in order to improve the electrical properties and reliability of the electronic display screens, materials such as epoxy resin, organosilicon material and glass are generally adopted to package core components, so that the core components are isolated from the outside air and water vapor.
The choice of packaging process and material often causes defects in the packaging layer, which act as fast paths for moisture and corrosive ions to enter, resulting in display anomalies. Therefore, how to locate defects in electronic display packages is a focus of attention in the industry.
Currently, there are about 2 methods for preparing fluorescence detection samples of electronic display screens:
the first method is to directly perform a fluorescent liquid immersion on the sample and then observe the sample under a fluorescent microscope. The electronic display screen sample to be detected is soaked in the fluorescent liquid, the fluorescent liquid is made to penetrate into a crack, then the electronic display screen sample is placed under a fluorescent microscope for observation, but due to the fact that the surface wettability and the adhesive force of the organic electronic display screen sample are low, the fluorescent liquid is difficult to attach, pollutants such as oil stains, dust stains and the like are prone to being on the surface of the electronic display screen sample, the contact angle between the surface of the electronic display screen sample and the fluorescent liquid is large, and the fluorescent liquid is difficult to attach. Due to the difficulties, the fluorescent method is difficult to be applied to the surface defect location of the organic electronic display screen sample.
The second method is to simultaneously evacuate the sample and the fluorescent liquid immersed in the fluorescent liquid. However, because the sample is soaked in the fluorescent liquid, the sample gas soaked in the liquid cannot be well pumped out even though the vacuum pumping is carried out; meanwhile, some oil stains, pollutants and the like on the surface of the sample cannot be cleaned in the vacuum-pumping process. These results in difficulty in penetrating the fluorescent liquid to attach to the crack, making fluorescent localization of the sample surface defects difficult.
In view of the above problems, how to provide a method for detecting surface defects of an electronic display screen, which can improve the adhesion capability of a fluorescent liquid on the surface of a sample of the electronic display screen, so that the adhesion and positioning of the fluorescent liquid become a problem to be solved urgently at present.
Disclosure of Invention
In view of the defects of the prior art, the present invention provides a method for detecting surface defects of an electronic display screen. The method for detecting the surface defects of the electronic display screen has the characteristics of simplicity and rapidness, and effectively solves the problem that in the fluorescence detection process of the surface defects of the conventional electronic display screen, due to low wettability and adhesion of the surface of a sample and substances such as oil stains, dust and dirt on the surface of the sample, fluorescent liquid is difficult to permeate and adhere, and the defects cannot be positioned at the positions of the defects.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for detecting surface defects of an electronic display screen, which is characterized by comprising the following steps of:
sequentially carrying out corona treatment and fluorescent liquid soaking on the electronic display screen sample to obtain a pretreated electronic display screen sample; and then detecting the surface cracks of the pretreated electronic display screen sample by using a fluorescence microscope.
In the present invention, the pressure of the corona treatment is 2 to 100kV (for example, 2kV, 10kV, 15kV, 20kV, 25kV, 30kV, 35kV, 40kV, 45kV, 50kV, 55kV, 60kV, 65kV, 70kV, 75kV, 80kV, 85kV, 90kV, 95kV, 100kV, etc.).
In the present invention, the frequency of the corona treatment is 2 to 10kHz (for example, 2kHz, 2.5kHz, 3kHz, 3.5kHz, 4kHz, 4.5kHz, 5kHz, 5.5kHz, 6kHz, 6.5kHz, 7kHz, 7.5kHz, 8kHz, 8.5kHz, 9kHz, 9.5kHz, 10kHz, etc.) may be mentioned.
High voltage and high frequency are applied to a discharge electrode of a corona device. Thereby generating a large amount of plasma gas ozone, and the plasma gas directly or indirectly acts with the surface molecules of the sample to be detected, so that polar groups such as carbonyl, nitrogen-containing groups and the like are generated on the molecular chains on the surface of the sample, and the surface tension is improved. Meanwhile, the strong ion impact can coarsen the surface of the sample and remove substances such as greasy dirt, water vapor, dust and the like. The joint action results in obviously improved adhesion of the surface of the sample, and the purposes of increasing the wettability and adhesion of the surface of the electronic display screen are achieved, so that the fluorescent liquid can be very easily infiltrated into the defect position to achieve the purpose of fluorescent positioning.
In the present invention, the fluorescent liquid includes any one of fluorescein, rhodamine B, or rhodamine 6G, or a combination of at least two of them.
In the present invention, the concentration of the fluorescent liquid is 80 to 120ppm (for example, 80ppm, 85ppm, 90ppm, 95ppm, 100ppm, 105ppm, 110ppm, 115ppm, 120ppm, etc.).
In the present invention, the temperature of the soaking is 20 to 30 ℃ (for example, 20 ℃, 22 ℃, 24 ℃, 26 ℃, 28 ℃, 30 ℃ and the like can be used).
In the present invention, the soaking time is 22-26h (for example, 22h, 23h, 24h, 25h, 26h, etc.).
In the present invention, the electronic display sample needs to be wiped with an organic solvent before the corona treatment.
In the present invention, the organic solvent includes any one of methanol, ethanol, or acetone, or a combination of at least two thereof.
And the electronic display screen is wiped by using an organic solvent, so that visible pollutants and dust and dirt on the surface of the sample can be removed.
As a preferable technical scheme of the invention, the method for detecting the surface defects of the electronic display screen comprises the following steps:
(1) wiping the electronic display screen sample by using an organic solvent to obtain the electronic display screen sample wiped by the organic solvent;
wherein the organic solvent comprises any one or a combination of at least two of methanol, ethanol or acetone;
(2) carrying out corona treatment on the electronic display screen sample wiped by the organic solvent to obtain the corona-treated electronic display screen sample;
wherein the pressure of the corona treatment is 2-100kV, and the frequency of the corona treatment is 2-10 kHz;
(3) soaking the electronic display screen sample subjected to corona treatment obtained in the step (2) with a fluorescent solution to obtain a fluorescent solution soaked electronic display screen sample;
the fluorescent liquid comprises any one or the combination of at least two of fluorescein, rhodamine B and rhodamine 6G, and the concentration of the fluorescent liquid is 80-120 ppm; the soaking temperature is 20-30 ℃, and the soaking time is 22-26 h;
(4) and (4) detecting cracks of the electronic display screen sample soaked in the fluorescent liquid obtained in the step (3) by using a fluorescent microscope.
Compared with the prior art, the invention has the following beneficial effects:
in the method for detecting the surface defects of the electronic display screen, a sample of the electronic display screen is subjected to corona discharge treatment, so that a large amount of plasma gas ozone is generated, and the plasma gas directly or indirectly acts with surface molecules of the sample to be detected, so that polar groups such as carbonyl groups, nitrogen-containing groups and the like are generated on molecular chains on the surface of the sample, and the surface tension is improved. Meanwhile, the strong ion impact can coarsen the surface of the sample and remove substances such as greasy dirt, water vapor, dust and the like. The joint action results in obviously improved adhesion of the surface of the sample, and the purposes of increasing the wettability and adhesion of the surface of the electronic display screen are achieved, so that the fluorescent liquid can be very easily infiltrated into the defect position to achieve the purpose of fluorescent positioning.
Drawings
Fig. 1 is a flowchart of a defect detection method for an electronic display packaging material according to embodiment 1.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
The sources of the raw materials used in the following examples are as follows:
rhodamine B, tianjin guang.
Fluorescein, sigma-aldrich, cat # 46955, CAS # 2321-07-5.
Example 1
The present embodiment provides a method for detecting surface defects of an electronic display screen, as shown in fig. 1, the method for detecting surface defects of an electronic display screen includes the following steps:
(1) wiping the electronic display screen sample by using an organic solvent methanol to obtain the electronic display screen sample wiped by the organic solvent;
(2) carrying out corona treatment on the electronic display screen sample wiped by the organic solvent to obtain the corona-treated electronic display screen sample;
wherein the pressure of the corona treatment is 50kV, and the frequency of the corona treatment is 5 kHz;
(3) soaking the electronic display screen sample subjected to corona treatment obtained in the step (2) with a fluorescent solution to obtain a fluorescent solution soaked electronic display screen sample;
wherein the fluorescent liquid comprises fluorescein; the soaking temperature is 25 ℃, and the soaking time is 24 hours;
(4) and (4) detecting cracks of the electronic display screen sample soaked in the fluorescent liquid obtained in the step (3) by using a fluorescent microscope.
Example 2
The implementation provides a method for detecting surface defects of an electronic display screen, which comprises the following steps:
(1) wiping the electronic display screen sample by using an organic solvent ethanol to obtain the electronic display screen sample wiped by the organic solvent;
(2) carrying out corona treatment on the electronic display screen sample wiped by the organic solvent to obtain the corona-treated electronic display screen sample;
wherein the pressure of the corona treatment is 80kV, and the frequency of the corona treatment is 3 kHz;
(3) soaking the electronic display screen sample subjected to corona treatment obtained in the step (2) with a fluorescent solution to obtain a fluorescent solution soaked electronic display screen sample;
wherein the fluorescent liquid comprises rhodamine B; the soaking temperature is 26 ℃, and the soaking time is 23 hours;
(4) and (4) detecting cracks of the electronic display screen sample soaked in the fluorescent liquid obtained in the step (3) by using a fluorescence microscope.
Example 3
The implementation provides a method for detecting surface defects of an electronic display screen, which comprises the following steps:
(1) wiping the electronic display screen sample by using an organic solvent acetone to obtain the electronic display screen sample wiped by the organic solvent;
(2) carrying out corona treatment on the electronic display screen sample wiped by the organic solvent to obtain the corona-treated electronic display screen sample;
wherein the pressure of the corona treatment is 30kV, and the frequency of the corona treatment is 8 kHz;
(3) soaking the electronic display screen sample subjected to corona treatment obtained in the step (2) with a fluorescent solution to obtain a fluorescent solution soaked electronic display screen sample;
wherein the fluorescent liquid comprises fluorescein; the soaking temperature is 24 ℃, and the soaking time is 25 hours;
(4) and (4) detecting cracks of the electronic display screen sample soaked in the fluorescent liquid obtained in the step (3) by using a fluorescent microscope.
Example 4
The implementation provides a method for detecting surface defects of an electronic display screen, which is different from the method in example 1 only in that in the step (2), the pressure of the corona treatment is 1kV, and the frequency of the corona treatment is 20 kHz; the other steps are the same as in example 1.
Example 5
The implementation provides a method for detecting surface defects of an electronic display screen, which is different from the method in example 1 only in that in the step (2), the pressure of the corona treatment is 110kV, and the frequency of the corona treatment is 1 kHz; the other steps are the same as in example 1.
Comparative example 1
The comparison example provides a method for detecting surface defects of an electronic display screen, which is different from the method in the example 1 only in that the step (2) is omitted, the electronic display screen sample obtained in the step (1) after being wiped by the organic solvent is directly soaked in the fluorescent liquid, and other steps are the same as the step (1).
Test example
Contact Angle testing
Testing a sample: the electronic display screen samples after corona treatment obtained in the step (2) in the test examples 1 to 5 and the electronic display screen samples after wiping with the organic solvent obtained in the step (1) in the comparative example 1.
The test method comprises the following steps: the static contact angle of the fluorescent solution (fluorescein) on the electronic display screen was measured using Drop-Master, the same sample was measured 8 times at different positions, the average was taken, and the test results are shown in table 1.
TABLE 1
| Sample(s) | Contact angle (°) |
| Example 1 | 3 |
| Example 2 | 4 |
| Example 3 | 3 |
| Example 4 | 8 |
| Example 5 | 9 |
| Comparative example 1 | 15 |
As can be seen from the data in Table 1, the method for detecting the defects of the electronic display screen provided by the invention enables the contact angle between the surface of the sample of the electronic display screen and the fluorescent liquid to be reduced, and the fluorescent liquid is easy to adhere to the sample. However, when the pressure and frequency of the corona are too high or too low, or the corona is not used, the contact angle between the surface of the sample of the electronic display screen and the fluorescent liquid is increased, and the fluorescent liquid is difficult to adhere to the surface of the sample of the electronic display screen.
The applicant states that the present invention is illustrated by the above examples of the process of the present invention, but the present invention is not limited to the above process steps, i.e. it is not meant that the present invention must rely on the above process steps to be carried out. It will be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific modes and the like, which are within the scope and disclosure of the present invention, are contemplated by the present invention.
Claims (10)
1. A detection method for surface defects of an electronic display screen is characterized by comprising the following steps:
sequentially carrying out corona treatment and fluorescent liquid soaking on the electronic display screen sample to obtain a pretreated electronic display screen sample; and then detecting the surface cracks of the pretreated electronic display screen sample by using a fluorescence microscope.
2. The detection method according to claim 1, wherein the pressure of the corona treatment is 2-100 kV.
3. The detection method according to claim 1 or 2, wherein the frequency of the corona treatment is 2-10 kHz.
4. The detection method according to any one of claims 1 to 3, wherein the fluorescent liquid comprises any one of fluorescein, rhodamine B or rhodamine 6G, or a combination of at least two of them.
5. The detection method according to any one of claims 1 to 4, wherein the concentration of the fluorescent liquid is 80 to 120 ppm.
6. The method for detecting according to any one of claims 1 to 5, wherein the temperature of the soaking is 20 to 30 ℃.
7. The assay of any one of claims 1 to 6 wherein the soaking time is 22 to 26 hours.
8. The detection method according to any one of claims 1 to 7, wherein the electronic display sample is wiped with an organic solvent before the corona treatment.
9. The detection method according to claim 8, wherein the organic solvent comprises any one of methanol, ethanol, or acetone, or a combination of at least two thereof.
10. The method for detecting the surface defects of the electronic display screen according to any one of claims 1 to 9, wherein the method for detecting the surface defects of the electronic display screen comprises the following steps:
(1) wiping the electronic display screen sample by using an organic solvent to obtain the electronic display screen sample wiped by the organic solvent;
wherein the organic solvent comprises any one or a combination of at least two of methanol, ethanol or acetone;
(2) carrying out corona treatment on the electronic display screen sample wiped by the organic solvent to obtain the corona-treated electronic display screen sample;
wherein the pressure of the corona treatment is 2-100kV, and the frequency of the corona treatment is 2-10 kHz;
(3) soaking the electronic display screen sample subjected to corona treatment obtained in the step (2) with a fluorescent solution to obtain a fluorescent solution soaked electronic display screen sample;
the fluorescent liquid comprises any one or the combination of at least two of fluorescein, rhodamine B and rhodamine 6G, and the concentration of the fluorescent liquid is 80-120 ppm; the soaking temperature is 20-30 ℃, and the soaking time is 22-26 h;
(4) and (4) detecting cracks of the electronic display screen sample soaked in the fluorescent liquid obtained in the step (3) by using a fluorescent microscope.
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| CN202210655861.8A CN115078398A (en) | 2022-06-10 | 2022-06-10 | Method for detecting surface defects of electronic display screen |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060134606A1 (en) * | 2002-08-16 | 2006-06-22 | Montagu Jean I | Substrates for isolating reacting and microscopically analiyzing materials |
| CN109211930A (en) * | 2018-08-31 | 2019-01-15 | 胜科纳米（苏州）有限公司 | The defect inspection method of electronic display encapsulating material |
| CN109211929A (en) * | 2018-08-31 | 2019-01-15 | 胜科纳米（苏州）有限公司 | The detection method of electronic apparatus encapsulation defect |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060134606A1 (en) * | 2002-08-16 | 2006-06-22 | Montagu Jean I | Substrates for isolating reacting and microscopically analiyzing materials |
| CN109211930A (en) * | 2018-08-31 | 2019-01-15 | 胜科纳米（苏州）有限公司 | The defect inspection method of electronic display encapsulating material |
| CN109211929A (en) * | 2018-08-31 | 2019-01-15 | 胜科纳米（苏州）有限公司 | The detection method of electronic apparatus encapsulation defect |
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| Title |
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| 周起钏: "用放电处理的方法来改善聚对苯二甲酸乙二醇酯的表面性能" * |
| 章益焱,周晓东,戴干策: "聚丙烯材料粘结和涂装性能的改善方法" * |
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