Brown coating method and vehicle lamp decoration part based on magnetron sputtering coating process

Abstract

The present invention provides a coffee-colored coating method and vehicle lamp decorative part based on a magnetron sputtering coating process. The coffee-colored coating method based on the magnetron sputtering coating process comprises the following steps: providing a substrate; forming a bonding layer on one side of the substrate; magnetron sputtering the silicon-based alloy target material on the side of the bonding layer facing away from the substrate to form a color layer of a first target thickness, wherein the color layer displays an intrinsic color; and forming a color adjustment layer of a second target thickness on the side of the color layer facing away from the bonding layer. The color layer prepared based on the silicon-based alloy target material is designed to display an intrinsic color in combination with its thickness, with an L value of approximately 64, an a value of approximately 0.17, and a b value of approximately 4.65 in CIE-Lab. The thickness of the color adjustment layer is then controlled to the second target thickness to further adjust the a and b values to achieve the production of a coffee-colored thin film.

Description

Technical Field

[0001] The present invention relates to the field of coating technology, and more particularly to a coffee-colored coating method and a vehicle lamp decorative part based on a magnetron sputtering coating process. Background Art

[0002] The colors of some decorative parts of traditional car lights can be achieved through processes such as evaporation, injection molding, spraying and water electroplating, but different processes have certain bottlenecks or defects, or are not conducive to environmental protection.

[0003] According to the analysis of some of the latest released car headlight decorative parts, some headlight decorative parts have begun to be coated based on the magnetron sputtering coating process, such as dark chrome plating to achieve smoky gray decorative parts.

[0004] However, currently no other colors of headlight decorations have been developed, and the colors are relatively single and traditional. Summary of the Invention

[0005] In view of this, in order to solve the above problems, the present invention provides a brown coating method and a vehicle lamp decorative part based on a magnetron sputtering coating process, and the technical solution is as follows:

[0006] A coffee-colored coating method based on a magnetron sputtering coating process, the coffee-colored coating method comprising:

[0007] providing a substrate;

[0008] forming a bonding layer on one side of the substrate;

[0009] Based on a silicon-based alloy target, magnetron sputtering the silicon-based alloy target to form a color layer of a first target thickness on a side of the bonding layer facing away from the substrate, wherein the color layer displays an intrinsic color;

[0010] A tinting layer with a second target thickness is formed on a side of the color layer facing away from the adhesive layer.

[0011] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, before forming the bonding layer, the coffee-colored coating method further comprises:

[0012] The substrate is subjected to a plasma cleaning process.

[0013] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, the plasma cleaning treatment of the substrate includes:

[0014] The parameters of the vacuum chamber are adjusted, argon gas is introduced and ionized into an ion state, and the substrate is subjected to plasma cleaning treatment.

[0015] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, the bonding layer is a first silicone oil layer, and the bonding layer is formed on one side of the substrate, comprising:

[0016] The parameters of the vacuum chamber are adjusted, and argon, nitrogen, oxygen and silicone oil vapor are introduced to form the first silicone oil layer on one side of the substrate.

[0017] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, the method is based on a silicon-based alloy target, and magnetron sputtering the silicon-based alloy target to form a color layer of a first target thickness on the side of the bonding layer away from the substrate includes:

[0018] The parameters of the vacuum chamber are adjusted, argon gas is introduced, and the silicon-based alloy target material is magnetron sputtered to form a color layer of a first target thickness on a side of the bonding layer away from the substrate.

[0019] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, the color-adjusting layer is a second silicone oil layer, and the step of forming the color-adjusting layer with a second target thickness on a side of the color layer away from the bonding layer includes:

[0020] The parameters of the vacuum chamber are adjusted, and argon, nitrogen, oxygen and silicone oil vapor are introduced to form a second silicone oil layer of a second target thickness on the side of the color layer away from the bonding layer.

[0021] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, the silicon-based alloy target is an alloy target of nickel and silicon, an alloy target of chromium and silicon, or an alloy target of titanium and silicon.

[0022] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, when the silicon-based alloy target is an alloy target of nickel and silicon, the proportion of nickel is 10%-50%.

[0023] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, when the silicon-based alloy target is an alloy target of nickel and silicon, the mass percentage of nickel to silicon is 50:50.

[0024] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, when the silicon-based alloy target is an alloy target of nickel and silicon, the first target thickness of the color layer is greater than or equal to 100 nm.

[0025] Preferably, in the above-mentioned coffee-colored coating method based on the magnetron sputtering coating process, when the silicon-based alloy target is an alloy target of nickel and silicon, the second target thickness of the color adjustment layer is 10 nm-60 nm.

[0026] The present application also provides a headlight decoration, which includes a brown film layer, and the brown film layer is prepared based on any of the above-mentioned brown coating methods.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention provides a method for producing a brown film using a magnetron sputtering coating process. The method comprises providing a substrate; forming a bonding layer on one side of the substrate; magnetron sputtering a silicon-based alloy target material onto the bonding layer facing away from the substrate to form a color layer of a first target thickness, wherein the color layer exhibits an intrinsic color; and forming a tinting layer of a second target thickness onto the color layer facing away from the bonding layer. The tinting layer produced using the silicon-based alloy target material is designed to exhibit an intrinsic color, with an L value of approximately 64, an a value of approximately 0.17, and a b value of approximately 4.65 in CIE-Lab. The thickness of the tinting layer is then controlled to the second target thickness to further adjust the a and b values to produce a brown film. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1 A schematic flow chart of a method for producing a brown film by magnetron sputtering coating process according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 A schematic diagram of a portion of the structure corresponding to the coffee-colored coating method shown;

[0032] Figure 3 A schematic flow chart of another method for producing a brown coating based on a magnetron sputtering coating process according to an embodiment of the present invention;

[0033] Figure 4-Figure 5 for Figure 1 A schematic diagram of a portion of the structure corresponding to the coffee-colored coating method shown;

[0034] Figure 6 A schematic diagram of a CIE-Lab color measurement system provided in an embodiment of the present invention;

[0035] Figure 7 for Figure 1 Schematic diagram of part of the structure corresponding to the coffee-colored coating method shown. DETAILED DESCRIPTION

[0036] 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.

[0037] Based on the contents recorded in the background technology, it was found during the invention process of the present invention that the metallic color of existing car lamp decorative parts is generally achieved by evaporation process, injection molding process, electroplating process and spraying process; among them, the traditional evaporation process cannot currently achieve brown coating, and the tooling is not suitable for the production of car lamp parts; the color achieved by the injection molding process has a weak metallic color; the electroplating process and the spraying process have an adverse effect on environmental protection and sustainable development.

[0038] Furthermore, although the traditional magnetron sputtering coating process can achieve coating of some colors, the color of the formed film layer is relatively single, and there is currently no technology that can achieve brown coating based on the magnetron sputtering coating process.

[0039] Although the reactive magnetron sputtering process can achieve brown series coating, it is greatly affected by the film thickness. When the film thickness deviation is large, obvious color difference will appear. Therefore, the reactive magnetron sputtering process is not suitable for coating uneven car lamp parts.

[0040] Based on this, an embodiment of the present invention provides a coffee-colored coating method and vehicle lamp decorative part based on a magnetron sputtering coating process. The coffee-colored coating method based on a magnetron sputtering coating process comprises the following steps: providing a substrate; forming a bonding layer on one side of the substrate; magnetron sputtering the silicon-based alloy target material on the side of the bonding layer facing away from the substrate to form a color layer of a first target thickness, wherein the color layer displays an intrinsic color; and forming a color adjustment layer of a second target thickness on the side of the color layer facing away from the bonding layer. The color layer prepared based on the silicon-based alloy target material is designed to display an intrinsic color in combination with its thickness, with an L value of approximately 64, an a value of approximately 0.17, and a b value of approximately 4.65 in CIE-Lab. The thickness of the color adjustment layer is then controlled to the second target thickness to further adjust the a and b values to achieve the preparation of a coffee-colored thin film.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] refer to Figure 1 , Figure 1A schematic flow chart of a method for producing a brown film based on a magnetron sputtering coating process according to an embodiment of the present invention is provided. The method for producing a brown film based on a magnetron sputtering coating process includes:

[0043] S101: If Figure 2 As shown, a substrate 11 is provided.

[0044] Specifically, in this step, the substrate 11 includes but is not limited to a PC substrate. In the embodiment of the present invention, the PC substrate is taken as an example for description.

[0045] It should be noted that before coating and installing the substrate 11, the surface of the substrate 11 is cleaned by using an electrostatic air gun, but not limited to, and the installation tool is designed so that the vertical distance between the surface of the substrate 11 on which the film layer is to be formed and the surface of the target material is set to 120mm-300mm after the installation of the substrate 11 is completed, so as to ensure the integrity and uniformity of the subsequent film formation.

[0046] For further reference, Figure 3 , Figure 3 A schematic flow chart of another method for producing a brown coating based on a magnetron sputtering coating process according to an embodiment of the present invention is provided. Before forming the bonding layer in step S102, the brown coating method further comprises:

[0047] S105 : performing plasma cleaning on the substrate 11 .

[0048] Specifically, the parameters of the vacuum chamber are adjusted, argon gas is introduced and ionized into an ionic state, and the substrate 11 is subjected to plasma cleaning. Optionally, the vacuum chamber is evacuated to a vacuum environment that meets 0.5*10 -2 mbar-1.5*10 -2 mbar, 150 SCCM-250 SCCM of argon is introduced, the power is set to 3.5 kW-6.5 kW, the processing time is 45 s-90 s, and the discharge between the bombardment plates in the vacuum chamber ionizes the argon into an ionic state to achieve plasma cleaning treatment of the substrate 11 to improve the stability of subsequent film formation.

[0049] S102: Figure 4 As shown, a bonding layer 12 is formed on one side of the substrate 11 .

[0050] Specifically, in this step, the bonding layer 12 includes but is not limited to the first silicone oil layer. In the embodiment of the present invention, the bonding layer 12 is taken as the first silicone oil layer as an example for explanation. The bonding layer 12 mainly plays a primer role to improve the bonding stability between the substrate 11 and the subsequent film layer.

[0051] Optionally, the thickness of the bonding layer 12 is 10nm-35nm, for example, the thickness of the bonding layer 12 is 10nm or 12.5nm or 14.2nm or 15nm or 21nm or 35nm, etc. That is to say, the specific thickness of the bonding layer 12 can be reasonably selected within the range of 10nm-35nm according to actual needs, and it can also play a good bonding role while ensuring that the overall film layer is thin.

[0052] Among them, one possible way to form the bonding layer 12 of the first silicone oil layer is:

[0053] The parameters of the vacuum chamber are adjusted, and argon, nitrogen, oxygen and silicone oil vapor are introduced to form the first silicone oil layer on one side of the substrate 11. Optionally, the vacuum chamber is evacuated to a vacuum environment of 0.5*10 - 2 mbar-1.5*10 -2 mbar, 200 SCCM-230 SCCM of argon, 100 SCCM-130 SCCM of nitrogen and oxygen, 100 SCCM-130 SCCM of silicone oil vapor, the bombardment power is 4 kW-6.5 kW, the voltage between the bombardment plates in the vacuum chamber is 500 V-670 V, the processing time is about 45 s, and the preferred processing time is 45 s, thereby generating a Si / N / O compound, which is deposited on one side of the substrate 11 to form a base layer of the first silicone oil layer, which serves as the bonding layer 12.

[0054] It should be noted that the silicone oil vapor includes but is not limited to hexamethyldisiloxane vapor or tetramethyldisiloxane vapor.

[0055] S103: If Figure 5 As shown, based on a silicon-based alloy target, magnetron sputtering is performed on the silicon-based alloy target to form a color layer 13 of a first target thickness on the side of the bonding layer 12 away from the substrate 11 , and the color layer 13 displays an intrinsic color.

[0056] Specifically, in this step, the silicon-based alloy target is an alloy target of nickel and silicon, an alloy target of chromium and silicon, or an alloy target of titanium and silicon. It can be understood that in the embodiment of the present invention, the silicon-based alloy target can be an alloy target of silvery-white metal and silicon. It should be noted that in the embodiment of the present invention, the alloy target of nickel and silicon is described as the most core embodiment.

[0057] When the silicon-based alloy target is an alloy target of nickel and silicon, the proportion of nickel is 10%-50%.

[0058] When the silicon-based alloy target is an alloy target of nickel and silicon, the mass percentage of nickel and silicon is 50:50. It should be noted that the brown film layer finally prepared by the nickel and silicon alloy target in this ratio has the best effect.

[0059] Among them, based on the silicon-based alloy target material, a magnetron sputtering process is used to form a color layer 13 of a first target thickness on the side of the bonding layer 12 away from the substrate 11. One possible implementation method is:

[0060] Adjust the parameters of the vacuum chamber, introduce argon gas, and magnetron sputter the silicon-based alloy target to form a color layer 13 of a first target thickness on the side of the bonding layer 12 away from the substrate 11. Optionally, evacuate the vacuum chamber to a vacuum environment of 5*10 -5 mbar-8*10 -5 mbar, introduce about 500 SCCM of argon, set the power to about 30 kW-40 kW, preferably 30 kW, and the processing time to about 200 s, preferably 200 s, to complete the preparation of the color layer 13. When the silicon-based alloy target is an alloy target of nickel and silicon, the color layer 13 is a NiSi film layer.

[0061] Optionally, when the silicon-based alloy target is an alloy target of nickel and silicon, the first target thickness of the color layer 13 is greater than or equal to 100 nm.

[0062] It should be noted that the reference Figure 6 , Figure 6 This is a schematic diagram of a CIE-Lab color measurement system provided in an embodiment of the present invention. When the color layer 13 is a NiSi film layer, its thickness must be greater than or equal to 100 nm so that the NiSi film layer can display the intrinsic color of the material. The L value in CIE-Lab is approximately 64, the a value is approximately 0.17, and the b value is approximately 4.65. For example, the L value in CIE-Lab is 54-74, the a value is 0.07-0.27, and the b value is 2.65-6.65. In the embodiment of the present invention, the intrinsic color displayed by the NiSi film layer having a thickness greater than or equal to 100 nm is tested to have an L value of 64, an a value of 0.17, and a b value of 4.65 in CIE-Lab.

[0063] When the NiSi film is less than 100 nm thick, it is semi-transparent, and the displayed color is not the NiSi film's intrinsic color. In other words, in the embodiments of the present invention, color layer 13 serves as the primary color. Regardless of the silicon-based alloy target material used, the CIE-Lab L value of the intrinsic color displayed by color layer 13 must be approximately 64, the a value approximately 0.17, and the b value approximately 4.65.

[0064] S104: Figure 7 As shown, a tinting layer 14 with a second target thickness is formed on the side of the color layer 13 facing away from the bonding layer 12 .

[0065] Specifically, in this step, the color adjustment layer 14 includes but is not limited to the second silicone oil layer. In the embodiment of the present invention, the color adjustment layer 14 is taken as the second silicone oil layer as an example for description. The color adjustment layer 14 includes but is not limited to adjusting its own refractive index and other parameters through the design of its thickness to achieve color adjustment, for example, to achieve adjustment of the a value and b value in CIE-Lab. When the thickness of the color adjustment layer 14 increases, the a value and b value in CIE-Lab will also increase.

[0066] Optionally, when the silicon-based alloy target is an alloy target of nickel and silicon, the second target thickness of the color adjustment layer 14 is 10nm-60nm. For example, the thickness of the color adjustment layer 14 is 10nm or 20nm or 33.5nm or 48nm or 52.6nm or 60nm, etc., that is to say, the specific thickness of the adjustment layer can be reasonably selected within the range of 10nm-60nm according to actual needs, to ensure that the overall film layer can display a better coffee color with the cooperation of the color layer 13 and the color adjustment layer 14.

[0067] After multiple verifications, when a NiSi film layer with a first target thickness greater than or equal to 100 nm is used as the color layer 13, when the thickness of the color adjustment layer 14 is about 15 nm, the overall film layer can display a better coffee color, with an L value of 60.73, an a value of 2.15, and a b value of 9.25 in CIE-Lab.

[0068] One possible way to form the second silicone oil layer of the toning layer 14 is as follows:

[0069] The parameters of the vacuum chamber are adjusted, and argon, nitrogen, oxygen and silicone oil vapor are introduced to form a second silicone oil layer of a second target thickness on the side of the color layer 13 away from the adhesive layer 12. Optionally, the vacuum chamber is evacuated to a vacuum environment of 0.5*10 -2 mbar-1.5*10 -2 mbar, introduce 200 SCCM-230 SCCM of argon, 100 SCCM-130 SCCM of nitrogen and oxygen, and 100 SCCM-130 SCCM of silicone oil vapor, with a bombardment power of about 6.5 kW, preferably 6.5 kW, a voltage between bombardment plates in the vacuum chamber of 500 V-670 V, and a processing time of about 45 s, preferably 45 s, thereby generating a Si / N / O compound, which is deposited on one side of the substrate 11 to form a toning layer 14 of the second silicone oil layer.

[0070] Since the toning layer 14 also serves as the outermost layer of the entire film layer, the toning layer 14 also has the function of a protective layer, and its surface may also be hydrophobic.

[0071] It should be noted that the silicone oil vapor includes but is not limited to hexamethyldisiloxane vapor or tetramethyldisiloxane vapor.

[0072] As can be seen from the above description, the technical solution of this application has developed a novel brown magnetron sputtering coating process that can replace traditional processes such as injection molding, electroplating, and spraying; its vacuum coating method is also relatively environmentally friendly. Furthermore, the independently developed magnetron sputtering target material formula ratio is suitable for the production of large-scale coating equipment. Its nickel-silicon alloy target material is used for the first time in the field of automotive lamp sputtering coating. The target material can be sputtered to form a film in an environment that only requires argon gas, and the decorative color is achieved by the intrinsic color of the material. To a certain extent, it is less affected by the film thickness, which enriches the decorative color of the decorative parts of the automotive lamp and gives them a more visually appealing metallic texture.

[0073] Optionally, based on the above embodiments of the present application, a headlight decoration is provided in another embodiment of the present application, wherein the headlight decoration includes a coffee-colored film layer, and the coffee-colored film layer is prepared based on the coffee-colored coating method described in the above embodiments.

[0074] The above is a detailed introduction to the coffee-colored coating method and car lamp decorative parts based on the magnetron sputtering coating process provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

[0075] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0076] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that the process, method, article, or apparatus comprising a series of elements inherent to the elements, or also including elements inherent to these processes, methods, articles, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0077] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A brown coating method based on magnetron sputtering coating process, characterized in that: The coffee-colored coating method comprises: providing a substrate; forming a bonding layer on one side of the substrate, wherein the bonding layer is a first silicone oil layer; Based on a silicon-based alloy target, magnetron sputtering the silicon-based alloy target to form a color layer of a first target thickness on a side of the bonding layer facing away from the substrate, the color layer exhibiting an intrinsic color; wherein the silicon-based alloy target is an alloy target of nickel and silicon, the nickel ratio is 10%-50%, and the first target thickness of the color layer is greater than or equal to 100 nm; A color adjustment layer of a second target thickness is formed on a side of the color layer away from the bonding layer, wherein the color adjustment layer is a second silicone oil layer. The method of forming the color adjustment layer of the second target thickness on the side of the color layer away from the bonding layer includes: adjusting parameters of a vacuum chamber, introducing argon, nitrogen, oxygen and silicone oil vapor, and forming the second silicone oil layer of the second target thickness on the side of the color layer away from the bonding layer, wherein the second target thickness of the color adjustment layer is 10nm-60nm.

2. The brown coating method according to claim 1, characterized in that: Before forming the bonding layer, the brown coating method further comprises: The substrate is subjected to a plasma cleaning process.

3. The brown coating method according to claim 2, characterized in that: The plasma cleaning process of the substrate comprises: The parameters of the vacuum chamber are adjusted, argon gas is introduced and ionized into an ion state, and the substrate is subjected to plasma cleaning treatment.

4. The brown coating method according to claim 1, characterized in that: The step of forming a bonding layer on one side of the substrate comprises: The parameters of the vacuum chamber are adjusted, and argon, nitrogen, oxygen and silicone oil vapor are introduced to form the first silicone oil layer on one side of the substrate.

5. The brown coating method according to claim 1, characterized in that: The method of magnetron sputtering the silicon-based alloy target material to form a color layer of a first target thickness on a side of the bonding layer facing away from the substrate comprises: The parameters of the vacuum chamber are adjusted, argon gas is introduced, and the silicon-based alloy target material is magnetron sputtered to form a color layer of a first target thickness on a side of the bonding layer away from the substrate.

6. The brown coating method according to claim 1, characterized in that: The mass percentage of nickel and silicon is 50:

50.

7. A vehicle lamp decoration, characterized in that: The headlight decoration part includes a brown film layer, and the brown film layer is prepared based on the brown coating method according to any one of claims 1 to 6.

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