A carrier regeneration method for cutting OLED display screens

Abstract

The present invention relates to the technical field of OLED display screen preparation and discloses a carrier regeneration technology for OLED display screen cutting, comprising disassembling the carrier; soaking the disassembled carrier in an acetone bath; ultrasonically cleaning the carrier; soaking the carrier again in acetone; then rinsing the carrier with pure water; then soaking the carrier in a 50g / L sodium hydroxide solution; then rinsing the carrier with pure water; then soaking the carrier in 80g / L nitric acid; then rinsing the carrier with pure water; then oxidizing the carrier at a current density of 1.5A and 10°C using 150g / L sulfuric acid as an electrolyte; then washing the carrier with water, sealing the pores; then high-pressure and ultrasonic cleaning, and finally assembling the carrier. The carrier regenerated by this technology has a pore pass rate of over 90% and a service life of 6 months, which is close to the service life of a new carrier. At the same time, the oxidation tank used in this technology is used to oxidize the carrier, and the current distribution in the oxidation tank is uniform, and the thickness difference of the generated oxide film is extremely small, with good quality.

Description

Technical Field

[0001] The present invention relates to the technical field of OLED display screen preparation, and in particular to a carrier stage regeneration method for cutting an OLED display screen. Background Art

[0002] During the preparation process, OLED panels need to go through processes such as film formation, vacuum evaporation, spin coating, inkjet printing, and packaging. After packaging is completed, the basic functions of the panel are complete, but the packaged panel still needs to be cut into the actual product size. The carrier platform used for cutting OLED display screens adsorbs the OLED screen on the carrier through the pores on the component, and then the screen is precisely cut. Since there is a large amount of photoresist on the screen, the photoresist will be adsorbed into the pores and grooves during the cutting process. After long-term use, the photoresist will clog the pores and grooves, resulting in a decrease in the adsorption capacity of the carrier. The cost of replacing a new carrier is high, so regenerating the carrier is a very economical option.

[0003] At present, the traditional regeneration method uses organic solvent immersion treatment. Since the carrier has tens of thousands of pores and many grooves, photoresist will remain in it during the regeneration process of the carrier. The pore patency rate is usually between 60% and 70%. After regeneration, the adsorption efficiency of the panel is low and the service life is about 4 months, which is far shorter than the service life of a new carrier. Therefore, a carrier regeneration method for OLED display cutting is proposed. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a carrier regeneration method for cutting OLED display screens, which has the advantages of achieving a pore pass rate of more than 90% and a service life of 6 months, which is close to the service life of a new carrier, and effectively reducing corporate costs. It solves the problem that the traditional regeneration method uses organic solvent immersion treatment. Since the carrier has tens of thousands of pores and many grooves, photoresist will remain in it during the regeneration process of the carrier, and the pore pass rate is usually between 60% and 70%. The adsorption efficiency of the panel after regeneration is low and the service life is about 4 months, which is far lower than the service life of a new carrier.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose of achieving a pore pass rate of over 90% for the carrier, a service life of 6 months, which is close to the service life of a new carrier, and effectively reducing enterprise costs, the present invention provides the following technical solution: A carrier regeneration method for cutting OLED display screens, comprising the following steps:

[0008] S1. Disassembly: disassemble and separate the carrier;

[0009] S2, soaking in the chemical solution: Place the carrier disassembled in step S1 into an acetone bath and soak for 12 hours, passing compressed air during the soaking process;

[0010] S3, ultrasonic cleaning: ultrasonically clean the carrier after soaking in S2 using an ultrasonic cleaning device for 30 minutes;

[0011] S4, chemical solution soaking: Soak the carrier after washing in S3 in acetone again for 12 hours;

[0012] S5, pure water cleaning: Use pure water to overflow the carrier in S4 through the water washing equipment, and the overflow time is 2 hours;

[0013] S6, stripping: soaking the carrier after washing in step S5 in 50g / L sodium hydroxide solution at a temperature of 45°C for 3 minutes;

[0014] S7, pure water rinsing: rinsing the carrier in step S6 with pure water using a rinsing device;

[0015] S8, neutralization: at room temperature, soak the carrier in step S7 in 80g / L nitric acid for 8 minutes;

[0016] S9, pure water rinsing: rinse the carrier in step S8 again with pure water through the rinsing equipment;

[0017] S10, oxidation: placing the carrier in step S9 into an oxidation tank, using 150 g / L sulfuric acid as an electrolyte, and oxidizing the carrier at a current density of 1.5 A and a temperature of 10°C;

[0018] S11, ultrasonic cleaning: ultrasonically clean the carrier in step S10 with an ultrasonic cleaning device for 15 minutes;

[0019] S12, sealing: Under high temperature environment, immerse the carrier in S11 in pure water with a pH value of 5.5 for 4 hours;

[0020] S13, high-pressure water washing: using a high-pressure water washing device to wash the front and back surfaces of the carrier in step S12 at a pressure of 150 bar;

[0021] S14, ultrasonic cleaning: again use the ultrasonic cleaning equipment to clean the carrier in step S13 with pure water, and the washing time is 15 minutes;

[0022] S15, assembly: reassemble the carrier in step S14.

[0023] In the above-mentioned carrier regeneration method for cutting OLED display screens, the oxidation tank in the S10 step includes an oxidation tank main body, and two baffles are integrally provided in the two opposite side walls of the oxidation tank main body. The two baffles on the same side form a placement groove with the oxidation tank main body, and lead plates are placed inside the two placement grooves. The other two side walls of the oxidation tank main body are provided with a group of through holes, and the two groups of through holes are respectively provided on one side of the two lead plates, and lead electrodes are welded on the side walls of the two lead plates through the two groups of through holes.

[0024] In the above-mentioned carrier regeneration method for cutting an OLED display screen, the high temperature in step S12 is set to 98°C.

[0025] In the above-mentioned carrier stage regeneration method for cutting an OLED display screen, in the step S15, before assembling the carrier stage, each component of the carrier stage is air-dried by an air-drying device and then assembled.

[0026] In the above-mentioned carrier regeneration method for cutting an OLED display screen, in step S10, the oxidation overflow time of the carrier is 2 hours.

[0027] In the above-mentioned carrier regeneration method for cutting an OLED display screen, the oxidation tank body and the two lead plates are sealed and filled with green glue to ensure that the electrolyte cannot penetrate and leak.

[0028] In the above-mentioned carrier regeneration method for cutting an OLED display screen, the oxidation tank body is made of PP material.

[0029] In the above-mentioned carrier regeneration method for cutting an OLED display screen, the number of the through holes in each group is set to 9.

[0030] (3) Beneficial effects

[0031] Compared with the prior art, the present invention provides a stage regeneration method for cutting OLED display screens, which has the following beneficial effects:

[0032] 1. This method for regenerating a carrier used for cutting OLED display screens first involves two acetone soakings to remove most of the photoresist in the carrier's pores and grooves. It then soaks the carrier in a high-concentration sodium hydroxide solution, which can remove the photoresist on the one hand and react with the carrier to cause the photoresist to fall off on the other. Therefore, the photoresist is fully removed with significant results. The degree of corrosion can be effectively controlled by controlling the alkaline etching time, and re-oxidation can ensure that dimensional changes are within an acceptable range. The carrier's pore pass rate regenerated by this technology reaches over 90%, and its service life reaches 6 months, which is close to that of a new carrier, effectively reducing enterprise costs.

[0033] 2. The carrier regeneration method for cutting OLED display screens oxidizes the carrier through the oxidation tank through the cooperation of the oxidation tank main body, four baffles, two lead plates, two groups of through holes and two groups of lead electrodes. The current in the oxidation tank is evenly distributed, and the thickness difference of the generated oxide film is extremely small and the quality is good. This changes the traditional oxidation method using an ordinary oxidation tank, which will cause large thickness differences in different areas of the generated oxide film due to uneven current, and the large thickness difference is also prone to cracks in the generated oxide film. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural schematic diagram of a carrier regeneration method for cutting an OLED display screen proposed by the present invention;

[0035] Figure 2 The present invention proposes Figure 1 Schematic diagram of the top view structure.

[0036] In the figure: 1 oxidation tank body, 2 baffle, 3 lead plate, 4 through hole, 5 lead electrode. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0038] A method for regenerating a carrier for cutting an OLED display screen comprises the following steps:

[0039] S1. Disassembly: disassemble and separate the carrier;

[0040] S2, soaking in the chemical solution: Place the carrier disassembled in step S1 into an acetone bath and soak for 12 hours, passing compressed air during the soaking process;

[0041] S3, ultrasonic cleaning: ultrasonically clean the carrier after soaking in S2 using an ultrasonic cleaning device for 30 minutes;

[0042] S4, chemical solution soaking: Soak the carrier after washing in S3 in acetone again for 12 hours;

[0043] S5, pure water cleaning: Use pure water to overflow the carrier in S4 through the water washing equipment, and the overflow time is 2 hours;

[0044] S6, stripping: soaking the carrier after washing in step S5 in 50g / L sodium hydroxide solution at a temperature of 45°C for 3 minutes;

[0045] S7, pure water rinsing: rinsing the carrier in step S6 with pure water using a rinsing device;

[0046] S8, neutralization: at room temperature, soak the carrier in step S7 in 80g / L nitric acid for 8 minutes;

[0047] S9, pure water rinsing: rinse the carrier in step S8 again with pure water through the rinsing equipment;

[0048] S10, oxidation: placing the carrier from step S9 into an oxidation tank, using 150 g / L sulfuric acid as an electrolyte, oxidizing the carrier at a current density of 1.5 A and a temperature of 10° C., wherein the oxidation overflow time of the carrier is 2 h;

[0049] S11, ultrasonic cleaning: ultrasonically clean the carrier in step S10 with an ultrasonic cleaning device for 15 minutes;

[0050] S12, sealing: Under high temperature environment, the carrier in S11 is immersed in pure water with a pH value of 5.5 for 4 hours, and the high temperature is set to 98 ° C;

[0051] S13, high-pressure water washing: using a high-pressure water washing device to wash the front and back surfaces of the carrier in step S12 at a pressure of 150 bar;

[0052] S14, ultrasonic cleaning: again use the ultrasonic cleaning equipment to clean the carrier in step S13 with pure water, and the washing time is 15 minutes;

[0053] S15, assembly: reassemble the carrier in step S14. Before assembling, each component of the carrier needs to be air-dried, and then assemble after drying.

[0054] Example 2 is based on Example 1, as Figure 1-2 Show:

[0055] The oxidation tank in step S10 includes an oxidation tank main body 1, and two baffles 2 are integrally arranged in the two opposite side walls of the oxidation tank main body 1. The two baffles 2 on the same side form a placement groove with the oxidation tank main body 1, and lead plates 3 are placed inside the two placement grooves. A group of through holes 4 are opened on the other two side walls of the oxidation tank main body 1, and the two groups of through holes 4 are respectively arranged on one side of the two lead plates 3. Lead electrodes 5 are welded on the side walls of the two lead plates 3 through the two groups of through holes 4.

[0056] The oxidation tank body 1 and the two lead plates 3 are sealed and filled with green glue to ensure that the electrolyte cannot penetrate or leak.

[0057] The oxidation tank body 1 is made of PP material.

[0058] The number of through holes 4 in each group is 9.

[0059] To sum up, when using this technology, steps S1 to S15 are carried out in sequence. Most of the photoresist can be removed by double acetone soaking in steps S2 and S4. Then, the photoresist is soaked in 50g / L sodium hydroxide solution in step S6 for 3 minutes. On the one hand, the photoresist can be removed, and on the other hand, it reacts with the carrier to cause the photoresist to fall off. Therefore, the photoresist is fully removed and the effect is obvious. Combined with steps S8 and S10, the degree of corrosion can be effectively controlled by controlling the alkaline etching time. In addition, re-oxidation can ensure that the dimensional change is within an acceptable range. The pore pass rate of the carrier regenerated by this technology reaches more than 90%, and the service life reaches 6 months, which is close to the service life of a new carrier, effectively reducing enterprise costs.

[0060] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0061] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for regenerating a carrier for cutting an OLED display screen, characterized in that: The method comprises the following steps: S1. Disassembly: disassemble and separate the carrier; S2, soaking in the chemical solution: Place the carrier disassembled in step S1 into an acetone bath and soak for 12 hours, passing compressed air during the soaking process; S3, ultrasonic cleaning: ultrasonically clean the carrier after soaking in S2 using an ultrasonic cleaning device for 30 minutes; S4, chemical solution soaking: Soak the carrier after washing in S3 in acetone again for 12 hours; S5, pure water cleaning: Use pure water to overflow the carrier in S4 through the water washing equipment, and the overflow time is 2 hours; S6, stripping: soaking the carrier after washing in step S5 in 50g / L sodium hydroxide solution at a temperature of 45°C for 3 minutes; S7, pure water rinsing: rinse the carrier in step S6 with pure water using a rinsing device; S8, neutralization: at room temperature, soak the carrier in step S7 in 80 g / L nitric acid for 8 minutes; S9, pure water rinsing: rinse the carrier in step S8 again with pure water through the rinsing equipment; S10, oxidation: placing the carrier in step S9 into an oxidation tank, using 150 g / L sulfuric acid as an electrolyte, and oxidizing the carrier at a current density of 1.5 A and a temperature of 10°C; S11, ultrasonic cleaning: ultrasonically clean the carrier in step S10 using an ultrasonic cleaning device for 15 minutes; S12, sealing: Under high temperature environment, immerse the carrier in S11 in pure water with a pH value of 5.5 for 4 hours; S13, high-pressure water washing: using a high-pressure water washing device to wash the front and back surfaces of the carrier in step S12 at a pressure of 150 bar; S14, ultrasonic cleaning: using pure water to clean the carrier in step S13 again through the ultrasonic cleaning equipment, the washing time is 15 minutes; S15, assembly: reassemble the carrier in step S14.

2. The method for regenerating a carrier for cutting an OLED display screen according to claim 1, wherein: The oxidation tank in step S10 comprises an oxidation tank body (1), two baffles (2) are integrally provided in two opposite side walls of the oxidation tank body (1), the two baffles (2) on the same side form a placement groove with the oxidation tank body (1), lead plates (3) are placed inside the two placement grooves, and the other two side walls of the oxidation tank body (1) are each provided with a group of through holes (4), the two groups of through holes (4) are respectively arranged on one side of the two lead plates (3), and lead electrodes (5) are welded on the side walls of the two lead plates (3) through the two groups of through holes (4).

3. The method for regenerating a carrier for cutting an OLED display screen according to claim 1, wherein: The high temperature in the step S12 is set to 98°C.

4. The method for regenerating a carrier for cutting an OLED display screen according to claim 1, wherein: In the step S15, before assembling the carrier, each component of the carrier is air-dried by an air-drying device before being assembled.

5. The method for regenerating a carrier for cutting an OLED display screen according to claim 1, wherein: In the step S10, the oxidation overflow time of the carrier is 2 hours.

6. The method for regenerating a carrier for cutting an OLED display screen according to claim 2, wherein: The oxidation tank body (1) and the two lead plates (3) are sealed and filled with green glue to ensure that the electrolyte cannot penetrate or leak.

7. The method for regenerating a carrier for cutting an OLED display screen according to claim 2, wherein: The oxidation tank body (1) is made of PP material.

8. The method for regenerating a carrier for cutting an OLED display screen according to claim 2, wherein: The number of through holes (4) in each group is 9.

Images