Laser coating method

Abstract

The invention provides a laser coating method, and relates to the technical field of laser application. The laser coating method comprises the following steps: step 1, acquiring demand parameters of a substrate material needing to be coated, and setting coating working parameters according to the demand parameters; 2, cleaning the transparent material substrate, and ensuring that the surface of the transparent material substrate is free of oil stains and impurities; 3, the linear laser beam is divided into a cleaning laser beam and a coating laser beam through a spectroscope; step 4, carrying out laser cleaning on the surface of a substrate to be coated through a cleaning total reflection mirror by utilizing the cleaning laser beam; and step 5, performing hot melting on the target material in contact with the surface of the cleaned substrate in the step 4 by utilizing the film coating laser beam through a film coating total reflective mirror. According to the method, laser cleaning and film coating are integrated, the surface of the substrate does not need to be independently cleaned before film coating, the whole working process is smoother, large-scale production is facilitated, and laser cleaning objects are wider.

Description

Technical Field

[0001] The present invention relates to the technical field of laser applications, and particularly to a method for laser coating. Background Art

[0002] Electroplating is a process of plating a thin layer of other metals or alloys on the surface of certain metals by using the principle of electrolysis. During electroplating, the coating metal serves as the anode and is oxidized into cations and enters the electroplating solution; the metal product to be plated serves as the cathode, and the cations of the coating metal are reduced on the metal surface to form a coating.

[0003] Laser electroplating is a newly emerging high-energy beam electroplating technology, which is of great significance for the production and repair of microelectronic devices and large-scale integrated circuits. As a new type of coating equipment, laser coating equipment has a wide range of applications and can be used to prepare thin films of various substances such as metals, semiconductors, oxides, nitrides, carbides, borides, silicides, sulfides, and fluorides. In a laser coating equipment, the laser emitted from the laser passes through the laser window part and enters the coating chamber, and bombards the target material, so that the target material evaporates or even ionizes and moves towards the substrate, thereby forming a thin film material.

[0004] With the development of laser technology, laser plastic coating has been widely used in fields such as automobiles, medicine, and electronics. Currently, laser plastic coating is mainly carried out on the surface of plastics. For most existing laser coating equipment, the surface of the substrate needs to be cleaned before coating. However, general cleaning methods, such as ultrasonic cleaning, require the addition of corresponding equipment and also a separate cleaning process, which is not advisable in terms of cost and the process itself. At the same time, ordinary cleaning methods are all for cleaning the entire surface of the substrate, and there is a long time interval between cleaning and actual coating. During this period, the surface of the substrate is very likely to be covered with some dust again, which has a negative impact on the subsequent plastic coating, and after coating the substrate, there may be some cracks in the film layer, resulting in many unqualified products.

[0005] Therefore, those skilled in the art have provided a method for laser coating to solve the problems raised in the above background art. Summary of the Invention

[0006] (1) Technical Problems to be Solved

[0007] Aiming at the deficiencies of the prior art, the present invention provides a method for laser coating, which solves the problem that ordinary cleaning methods are all for cleaning the entire surface of the substrate, and there is a long time interval between cleaning and actual coating. During this period, the surface of the substrate is very likely to be covered with some dust again, which has a negative impact on the subsequent plastic coating, and after coating the substrate, there may be some cracks in the film layer, resulting in many unqualified products.

[0008] (2) Technical Solution

[0009] To achieve the above object, the present invention is realized through the following technical solutions:

[0010] A method for laser coating, comprising the following steps:

[0011] Step 1: Obtain the required parameters of the substrate material to be coated, and set the working parameters of the coating according to the required parameters;

[0012] Step 2: Clean the transparent material substrate, and ensure that its surface has no oil stains and impurities;

[0013] Step 3: Divide a linear laser beam into a cleaning laser beam and a coating laser beam by a beam splitter;

[0014] Step 4: Use the above-mentioned cleaning laser beam to perform laser cleaning on the surface of the substrate to be coated through a cleaning total reflection mirror;

[0015] Step 5: Use the above-mentioned coating laser beam to melt the target material in contact with the surface of the substrate cleaned in Step 4 through a coating total reflection mirror;

[0016] Step 6: The coating laser beam passes through from above the transparent material substrate and irradiates on the target material, causing the target material to heat up and melt and sputter onto the surface of the transparent material substrate to form a coating layer;

[0017] Step 7: Use another laser beam to heat the second surface of the coating layer pressed on the substrate and condense the formed coating layer to complete the laser coating.

[0018] Further, before using the cleaning laser beam to clean the transparent material substrate, it also includes using a preheating laser beam to perform preheating treatment on the surface of the transparent material substrate, and the laser intensity of the preheating laser beam is less than the laser intensity of the cleaning laser beam.

[0019] Further, after Step 7, it also includes further processing the coated transparent material, such as annealing and polishing, to improve the quality and performance of the coating layer.

[0020] Further, both the linear laser beam and the other laser beam are generated by a semiconductor laser, and their wavelength ranges are 800μm - 1200μm, and the power density ranges of the cleaning laser beam and the coating laser beam generated by the beam splitter are 100W / cm - 110W / cm.

[0021] Further, the material of the target material is a thermoplastic or resin, and the substrate material is a crystal substrate, a glass plate, a crystal plate or a polymer transparent material plate.

[0022] Further, the linear laser beam is a uniform strip-shaped laser beam.

[0023] Further, the other laser beam is perpendicularly irradiated on the second surface of the coating layer.

[0024] Further, the preheating laser beam is a continuous linear or strip-shaped laser spot.

[0025] Further, the target and the transparent material substrate are placed in air, vacuum, argon, or nitrogen.

[0026] (III) Beneficial Effects

[0027] The present invention provides a method for laser coating. It has the following beneficial effects:

[0028] 1. The present invention provides a method for laser coating. Before coating, the surface of the substrate material is cleaned by laser, effectively removing dirt such as dust and grease, avoiding its influence on the coating quality, and immediately performing the coating operation after cleaning, without the situation that the surface of the substrate is redeposited with dirt and affects the coating quality again. Before cleaning the substrate, the surface of the substrate is preheated by a preheating laser beam, which can make the temperature of the substrate surface reach a certain preset value before cleaning to reduce the adhesion of dust and grease on the substrate and further improve the subsequent cleaning effect of the substrate.

[0029] 2. The present invention provides a method for laser coating. After the coating layer is formed, it is heated and pressed on the substrate by another laser beam to achieve secondary pressing of the coating layer, strengthening the coating layer produced in the first process, and thus increasing the yield rate of the product.

[0030] 3. The present invention provides a method for laser coating. This method integrates laser cleaning and coating, and does not require separate cleaning of the substrate surface before coating, making the entire working process smoother, facilitating large-scale production, and the object of laser cleaning is also more extensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a process flow chart of the laser coating method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will clearly and completely describe the technical solutions in the specific embodiments of the present invention with reference to the drawings in the specific embodiments of the present invention. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, rather than all of the specific embodiments. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Specific implementation manner:

[0034] As Figure 1 shown, the specific implementation manner of the present invention provides a method for laser coating, including the following steps:

[0035] Step 1, obtain the required parameters of the substrate material to be coated, and set the working parameters of the coating according to the required parameters;

[0036] Step 2, clean the transparent material substrate, and ensure that its surface has no oil stains and impurities;

[0037] Step 3, divide a linear laser beam into a cleaning laser beam and a coating laser beam by using a beam splitter;

[0038] Step 4, use the above-mentioned cleaning laser beam to perform laser cleaning on the surface of the substrate to be coated through a cleaning total reflection mirror;

[0039] Step 5, use the above-mentioned coating laser beam to perform heat melting on the target material in contact with the surface of the substrate cleaned in Step 4 through a coating total reflection mirror;

[0040] Step 6, the coating laser beam passes through from above the transparent material substrate and irradiates on the target material, so that the target material is heated and melted and sputtered onto the surface of the transparent material substrate to form a coating layer;

[0041] Step 7, use another laser beam to heat the second surface of the coating layer pressed on the substrate, and condense the formed coating layer to complete the laser coating.

[0042] Before using the cleaning laser beam to clean the transparent material substrate, it also includes using a preheating laser beam to perform preheating treatment on the surface of the transparent material substrate, and the laser intensity of the preheating laser beam is less than the laser intensity of the cleaning laser beam.

[0043] The laser coating method provided by the embodiment of the present invention uses a laser to clean the surface of the substrate material before coating, effectively removing dirt such as dust and grease, avoiding its influence on the coating quality, and immediately performing the coating operation after cleaning, without the situation that the surface of the substrate is redeposited with dirt again to affect the coating quality. And before cleaning the substrate, using a preheating laser beam to perform preheating treatment on the surface of the substrate can make the temperature of the substrate surface reach a certain preset value before cleaning, so as to reduce the adhesion of dust and grease on the substrate and further improve the subsequent cleaning effect of the substrate.

[0044] In an alternative embodiment, after Step 7, it also includes further processing the coated transparent material, such as annealing and polishing, to improve the quality and performance of the coating layer.

[0045] In an alternative embodiment, both the linear laser beam and the other laser beam are generated by a semiconductor laser, and their wavelength ranges from 800 μm to 1200 μm. The power density ranges of the cleaning laser beam and the coating laser beam generated by the beam splitter are from 100 W / cm to 110 W / cm.

[0046] In an alternative embodiment, the material of the target is thermoplastic or resin, and the substrate material is a crystal substrate, a glass plate, a crystal plate or a polymer transparent material plate.

[0047] In an alternative embodiment, the linear laser beam is a uniform long-strip laser beam.

[0048] In an alternative embodiment, the other laser beam is perpendicularly irradiated on the second surface of the coating layer.

[0049] In the laser coating method provided by the embodiment of the present invention, after the coating layer is formed, it is heated and pressed on the substrate by the other laser beam to achieve secondary pressing of the coating layer, strengthen the coating layer generated in the first process, and thus increase the yield rate of the product.

[0050] In an alternative embodiment, the preheating laser beam is a continuous linear or long-strip laser spot.

[0051] In an alternative embodiment, the target and the transparent material substrate are placed in air, vacuum, argon or nitrogen.

[0052] The laser coating method provided by the embodiment of the present invention integrates laser cleaning and coating, and does not require separate cleaning of the substrate surface before coating, making the entire working process smoother, facilitating large-scale production, and also having a wider range of objects for laser cleaning.

[0053] Although specific embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these specific embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for laser coating, characterized in that, It includes the following steps: Step 1: Obtain the required parameters of the substrate material to be coated, and set the working parameters of coating according to the required parameters. Step 2: Clean the transparent material substrate and ensure that its surface has no oil stains and impurities. Step 3: Divide a linear laser beam into a cleaning laser beam and a coating laser beam by a beam splitter. Step 4: Use the above-mentioned cleaning laser beam to perform laser cleaning on the surface of the substrate to be coated through a cleaning total reflector. Step 5: Use the above-mentioned coating laser beam to melt the target material in contact with the surface of the substrate cleaned in Step 4 through a coating total reflector. Step 6: The coating laser beam passes through from above the transparent material substrate and irradiates on the target material, causing the target material to heat up and melt and sputter onto the surface of the transparent material substrate to form a coating layer. Step 7: Use another laser beam to heat the second surface of the coating layer pressed on the substrate and condense the formed coating layer to complete laser coating.

2. The method of laser coating according to claim 1, wherein Before using the cleaning laser beam to clean the transparent material substrate, it also includes using a preheating laser beam to perform preheating treatment on the surface of the transparent material substrate, and the laser intensity of the preheating laser beam is less than that of the cleaning laser beam.

3. A method for laser coating according to claim 1, characterized in that, After Step 7, it also includes further processing the coated transparent material, such as annealing and polishing, to improve the quality and performance of the coating layer.

4. A method for laser coating according to claim 1, characterized in that, Both the linear laser beam and the other laser beam are generated by a semiconductor laser, and their wavelength range is 800μm - 1200μm. The power density range of the cleaning laser beam and the coating laser beam generated by the beam splitter is 100W / cm - 110W / cm.

5. A method for laser coating according to claim 1, characterized in that, The material of the target is thermoplastic or resin, and the substrate material is a crystal substrate, a glass plate, a crystal plate or a polymer transparent material plate.

6. A method for laser coating according to claim 1, characterized in that, The linear laser beam is a uniform long-strip laser beam.

7. A method for laser coating according to claim 1, characterized in that, The other laser beam irradiates perpendicularly on the second surface of the coating layer.

8. A method for laser coating according to claim 1, characterized in that, The preheating laser beam is a continuous linear or long-strip laser spot.

9. A method for laser coating according to claim 1, characterized in that, The target and the transparent material substrate are placed in air, vacuum, argon or nitrogen.

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