CN115209656A - Shell assembly, preparation method thereof and electronic equipment - Google Patents

Shell assembly, preparation method thereof and electronic equipment Download PDF

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Publication number
CN115209656A
CN115209656A CN202210786494.5A CN202210786494A CN115209656A CN 115209656 A CN115209656 A CN 115209656A CN 202210786494 A CN202210786494 A CN 202210786494A CN 115209656 A CN115209656 A CN 115209656A
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China
Prior art keywords
sub
coating layer
coating
layer
substrate
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Pending
Application number
CN202210786494.5A
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Chinese (zh)
Inventor
卢湘武
赵荣琦
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN202210786494.5A priority Critical patent/CN115209656A/en
Publication of CN115209656A publication Critical patent/CN115209656A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0217—Mechanical details of casings
    • H05K5/0243—Mechanical details of casings for decorative purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/095—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin

Abstract

The application provides a shell assembly, a preparation method thereof and an electronic device. The housing assembly includes: a substrate; the UV texture layer is arranged on one side of the base material; the optical coating layer is arranged on the surface of the UV texture layer far away from the base material and comprises at least one first sub coating layer and at least one second sub coating layer, the first sub coating layer and the second sub coating layer are alternately arranged, the refractive index of the first sub coating layer is smaller than that of the second sub coating layer, and the refractive index of the second sub coating layer is larger than or equal to 3.0. Through setting up the sub-coating film layer of second of higher refracting index, when can realizing the hi-lite, can also reduce the thickness on the sub-coating film layer of second greatly to with the whole thickness attenuate on optics coating film layer, avoided the problem of the rete fracture because of thickness is too thick and leads to, improve the product yield, shorten the time of coating film in addition in technology, improved the utilization ratio of equipment, reduced manufacturing cost.

Description

Shell assembly, preparation method thereof and electronic equipment
Technical Field
The application relates to the technical field of electronic equipment, in particular to a shell assembly, a preparation method of the shell assembly and the electronic equipment.
Background
In current housing assemblies, the coating process for the membrane generally includes two types: one is plated with film layer structures such as silicon oxide, indium tin, niobium oxide, titanium oxide, silicon oxide and the like, so that the shell is brightened, and the appearance effect of high brightness and silver color is obtained; the other is an optical film with high and low refractive indexes such as niobium oxide, titanium oxide, silicon oxide and the like, so that the high-brightness texture is obtained, and various colors are realized. However, in the above two coating schemes, in order to make the appearance of the housing assembly have higher brightness, the coating thickness is relatively thick, which results in long coating time and low efficiency.
Disclosure of Invention
The present application is directed to solving, at least in part, one of the technical problems in the related art. Therefore, an object of the present application is to provide a housing assembly, which has good appearance brightness and is not easy to crack an optical coating.
In one aspect of the present application, a housing assembly is provided. According to an embodiment of the application, the housing assembly comprises: a substrate; a UV texture layer disposed on one side of the substrate; the optical coating layer is arranged on the surface of the substrate far away from the UV texture layer and comprises at least one first sub coating layer and at least one second sub coating layer, the first sub coating layer and the second sub coating layer are alternately arranged, the refractive index of the first sub coating layer is smaller than that of the second sub coating layer, and the refractive index of the second sub coating layer is larger than or equal to 3.0. As can be seen from the fresnel principle, a thinner thickness is required for higher index materials to achieve the same reflectivity (brightness). In this application, through setting up the sub-coating film layer of second of higher refracting index, when can realizing the hi-lite, can also reduce the thickness on the sub-coating film layer of second greatly to with the whole thickness attenuate on optics coating film layer, avoided the problem of the rete fracture because of thickness is too thick and leads to, improve the product yield, shorten the time of coating film moreover in the technology, improved the utilization ratio of equipment, reduced manufacturing cost.
In another aspect of the present application, a method of making a housing assembly is provided. According to an embodiment of the application, a method of preparing a housing assembly comprises: providing a substrate; forming a UV texture layer on one side of the substrate; and sputtering and depositing optical coating layers on the surfaces of the UV texture layers far away from the base material, wherein the optical coating layers comprise at least one first sub coating layer and at least one second sub coating layer, the first sub coating layers and the second sub coating layers are alternately formed, the refractive index of the first sub coating layer is smaller than that of the second sub coating layer, and the refractive index of the second sub coating layer is larger than or equal to 3.0. Therefore, in the preparation method, the second sub-coating layer with higher refractive index is formed, the thickness of the second sub-coating layer can be greatly reduced while high brightness is achieved, the whole thickness of the optical coating layer is reduced, the problem of film cracking caused by over-thick thickness is avoided, the product yield is improved, the coating time is shortened technically, the utilization rate of equipment is improved, and the production cost is reduced.
In yet another aspect of the present application, an electronic device is provided. According to an embodiment of the present application, an electronic device includes: the housing assembly as described above; the display screen assembly is connected with the shell assembly, and an installation space is defined between the display screen assembly and the shell assembly; and the mainboard is arranged in the mounting space and is electrically connected with the display screen assembly. Therefore, the appearance of the shell of the electronic equipment has high brightness, the metal texture of the appearance of the electronic equipment is improved, and the thickness of the shell assembly of the electronic equipment is thin. Those skilled in the art will appreciate that the electronic device has all of the features and advantages of the housing assembly previously described and will not be described in any greater detail herein.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a housing assembly according to an embodiment of the present application;
FIG. 2 is a schematic structural view of a housing assembly according to another embodiment of the present application;
FIG. 3 is a schematic structural view of a housing assembly according to yet another embodiment of the present application;
FIG. 4 is a flow chart of preparing a housing assembly in yet another embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device in another embodiment of the present application.
Detailed Description
The scheme of the present application will be explained with reference to examples. It will be understood by those skilled in the art that the following examples are illustrative of the present application only and should not be taken as limiting the scope of the present application. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
The present application is described below with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
In one aspect of the present application, a housing assembly is provided. According to an embodiment of the present application, referring to fig. 1, a housing assembly includes: a substrate 10; the UV texture layer 20 and the UV texture layer 20 are arranged on one side of the substrate 10; optical coating layer 30, optical coating layer 30 is disposed on the surface of UV texture layer 20 far away from substrate 10, optical coating layer 30 includes at least one first sub-coating layer 31 and at least one second sub-coating layer 32 (only optical coating layer 30 includes two first sub-coating layers 31 and one second sub-coating layer 32 in fig. 1 as an example), first sub-coating layers 31 and second sub-coating layers 32 are alternately disposed, the refractive index of first sub-coating layer 31 is smaller than that of second sub-coating layer 32, and the refractive index of second sub-coating layer 32 is greater than or equal to 3.0. As can be seen from the fresnel principle, the thickness required for a higher index material is thinner to achieve the same reflectance (brightness) as the appearance of the housing assembly. In this application, through setting up the sub-coating film layer of higher refracting index, can realize hi-lite, strong metal feel while, can also reduce the thickness on the sub-coating film layer of second greatly to with the whole thickness attenuate of optics coating film layer, avoided the problem of the rete fracture because of the thickness is too thick leads to, improve the product yield, shorten the coating film time moreover in the technology, improved the utilization ratio of equipment, reduced manufacturing cost.
According to the embodiment of the application, the refractive index of the first sub-coating layer is less than or equal to 2.0, and the refractive index of the second sub-coating layer is greater than or equal to 4.0. From this, the sub-coating film layer of second has better refracting index, and the difference of the refracting index between first sub-coating film layer and the sub-coating film layer of second is great, improvement casing subassembly that can be better metal feel reduces the thickness on the sub-coating film layer of second greatly to with the whole thickness attenuate of optics coating film layer.
According to the embodiments of the present application, the specific type of the substrate has no special requirement, and those skilled in the art can flexibly select the substrate according to actual requirements, for example, the substrate may be a glass substrate, a plastic substrate, a ceramic substrate, or a metal substrate. The thickness of the base material has no special requirements, and those skilled in the art can flexibly select the base material according to actual conditions such as specific materials of the base material.
Furthermore, the thickness of the UV texture layer and the texture pattern have no special requirements, and those skilled in the art can flexibly select the thickness and the texture pattern according to actual requirements. In some embodiments, the UV texturing layer may have a thickness of 6 to 15 microns.
According to the embodiment of the application, the sub-coating layer in contact with the surface of the UV texture layer may be a first sub-coating layer or a second sub-coating layer, and there is no special requirement here, and those skilled in the art can flexibly set the sub-coating layer. Wherein, the sub-coating layer that sets up with UV texture layer contact still has the linking effect between the layer structure, and then improves the adhesive force of optical coating layer on UV texture layer, improves housing assembly's structural stability, and wherein, the thickness that sets up with UV texture layer contact can be thinner than the thickness on other sub-coating layers relatively. In addition, the sub-coating layer farthest from the substrate may be the first sub-coating layer or the second sub-coating layer, and there is no special requirement here, and those skilled in the art can make flexible settings. The sub-coating layer farthest away from the base material has a connection effect between layer structures, so that the adhesive force of the optical coating layer is improved, and the structural stability of the shell assembly is improved, wherein the thickness of the sub-coating layer farthest away from the base material can be thinner than the thicknesses of other sub-coating layers. In some embodiments, the substrate may be disposed adjacent to a first sub-coating layer, which may better provide brightness and metal texture of the housing assembly.
According to the embodiment of the application, the total thickness of the optical coating layer is less than 800nm, and the brightness L value of the outer surface of the shell assembly is greater than or equal to 80. Therefore, the optical film layer can provide good brightness for the shell assembly, the appearance effect of the shell assembly is improved, the thickness of the optical film layer is small, and the optical film layer is not prone to cracking when being attached to a base material and under a high-temperature environment.
Furthermore, the total thickness of the optical coating layer is less than or equal to 500nm, and the brightness L value of the outer surface of the shell component is greater than or equal to 90. From this, the optical film layer of this application not only can provide better luminance for casing subassembly, improves casing subassembly's outward appearance effect, and the thickness that further makes optical coating layer simultaneously is thinner, and is all difficult for cracking when laminating and under high temperature environment with the substrate.
According to the embodiment of the application, the material of the second sub-coating layer is amorphous silicon or a mixture containing amorphous silicon, wherein the content of silicon in the mixture containing amorphous silicon is more than or equal to 70%. Therefore, the second sub-coating layer of the material has higher refractive index, such as 4.0-4.5, so that the higher brightness of the appearance surface of the shell component can be effectively ensured, the total thickness of the optical coating layer can be greatly reduced, in some embodiments, the brightness L value of the shell component can be up to 90 or more, the strong metal texture of the shell component can be effectively realized, and the total thickness of the optical coating layer can be controlled within 500nm. Further, the amorphous silicon-containing mixture is at least one of Si-C (i.e., amorphous silicon mixture doped with carbon), si-Ge (i.e., amorphous silicon mixture doped with germanium), si-Al (i.e., amorphous silicon mixture doped with aluminum), si-Zr (i.e., amorphous silicon mixture doped with zirconium), and Si-Nb (i.e., amorphous silicon mixture doped with niobium). Therefore, the material still has higher refractive index, ensures higher brightness of the appearance of the shell assembly, and has wide source and proper cost.
In the existing coating process, a coating target material is usually made of materials such as silicon dioxide, niobium oxide, titanium oxide, zirconium oxide and the like, but the refractive index of the materials is generally about 2.4 and far lower than the refractive index of amorphous silicon and a mixture containing amorphous silicon, if the brightness L value of the appearance surface of the shell assembly is higher than 90, the thickness of an optical coating is generally required to be more than 1200nm, so that the thickness of the optical coating layer is thicker, the coating time is longer, the production efficiency and the product yield are lower, the cost is higher, the thicker optical coating layer can cause the optical coating layer to crack when the optical coating layer is attached to a base material, the reliability is lower, and meanwhile, in a high-temperature environment, the optical coating layer also can crack due to the expansion of OCA glue between the base material and the optical coating layer in the shell assembly. Compared with the coating materials such as silicon dioxide, niobium oxide, titanium oxide, zirconium oxide and the like which are commonly used at present, the amorphous silicon or the mixture containing the amorphous silicon has higher refractive index, the same brightness can be realized, simultaneously, the total thickness of the optical coating layer can be greatly reduced, the utilization rate of equipment is improved for batch production, and the batch production can be led into a winding coating process.
According to the embodiment of the application, the material of the first sub-coating layer is at least one of silicon dioxide, zirconium dioxide, aluminum oxide and magnesium fluoride. Therefore, the first sub-coating layer made of the materials is matched with the second sub-coating layer with high refractive index, and the light is reflected after passing through the optical coating layer in an alternate arrangement mode, so that the shell assembly has high brightness, and the metal texture of the appearance of the shell assembly is improved.
According to the embodiment of the application, the total number of the first sub-coating layer and the second sub-coating layer is 2-9, and the base material is adjacent to one first sub-coating layer. Therefore, the skilled in the art can flexibly set the number of the sub-coating layers according to the requirements on the appearance color of the shell assembly, the thickness of the optical coating layer and the brightness of the shell assembly so as to meet the performance requirement; and the substrate is adjacent to the first sub-coating layer, so that the brightness and the metal texture of the shell assembly can be better provided.
According to the embodiment of the application, referring to fig. 2, the optical coating layers comprise four first sub-coating layers 31 and four second sub-coating layers 32, the material of the second sub-coating layer 31 is amorphous silicon, the material of the first sub-coating layer 32 is silicon dioxide, the first sub-coating layer 31 is closest to the substrate 10, the second sub-coating layer 32 is farthest from the substrate, wherein the thicknesses of the four first sub-coating layers are respectively 5nm to 15nm, 50nm to 100nm and 50nm to 100nm, and the thicknesses of the four second sub-coating layers are respectively 10nm to 20nm, 20nm to 80nm, 30nm to 60nm and 5nm to 15nm in the direction far away from the substrate 10. Therefore, the total thickness of the optical coating layer with the structure can be as small as 500nm, even can be smaller than 400nm, and meanwhile, the brightness L value of the appearance surface of the shell assembly can reach more than 90.
According to the embodiment of this application, referring to fig. 3, the housing assembly further includes diaphragm 40 and cover primer film layer 50, and diaphragm 40 is located between UV texture layer and the substrate, and diaphragm 40 laminates through OCA optical cement 41 with substrate 10, and cover primer film layer 50 sets up the one side of keeping away from substrate 10 at optical coating layer 30. Wherein, the membrane can be a PET membrane and a PUT membrane, and the membrane also has an explosion-proof function and avoids the base material (especially the glass base material) from being burst; the color of the bottom oil film layer 50 can be white or black, so that protection can be provided for the optical coating layer, the effects of color and texture can be realized, the bottom oil film layer also plays a role in connection of shading and bonding auxiliary materials, water and oxygen in the environment are well separated, the stability of the optical coating layer is ensured, and the number of layers of the bottom oil film layer can be 2-5.
According to the embodiment of the present application, the specific shape of the housing assembly has no special requirement, and those skilled in the art can flexibly set the specific shape according to the actual situation of the housing assembly, for example, the specific shape of the housing assembly may be 2D, 2.5D, or 3D. When the shell assembly is of a 3D structure, the substrate is generally of a 3D structure, and as described above, the optical coating layer of the present application has a relatively small thickness, so that when the optical coating layer is attached to the substrate of the 3D structure, the possibility of attaching the optical coating to the 3D substrate can be better achieved, and the possibility of wrinkles and coating cracks is reduced.
In another aspect of the present application, a method of making a housing assembly is provided. According to an embodiment of the present application, referring to fig. 4, a method of preparing a housing assembly includes:
s100: a substrate 10 is provided.
According to the embodiments of the present application, the specific type of the substrate has no special requirement, and those skilled in the art can flexibly select the substrate according to actual requirements, for example, the substrate may be a glass substrate, a plastic substrate, a ceramic substrate, or a metal substrate. The thickness of the base material has no special requirement, and those skilled in the art can flexibly select the base material according to the actual conditions such as the specific material of the base material.
S200: a UV texture layer 20 is formed on one side of the substrate 101.
Specifically, a film 40 may be provided in advance, the UV texture layer 20 may be formed on one surface of the film 40 by stamping, and then the other surface of the film 40 is attached to the substrate through an optical adhesive 41 (the schematic structural diagram is shown in fig. 3). In the process of forming the UV texture layer 20 by imprinting, the UV glue needs to be cured by photo-curing, and the curing energy may be 800mj/cm 2 Light intensity of 100mw/cm 2～ 150mw/cm 2 。
S300: the optical coating layers 30 are sputtered and deposited on the surfaces, far away from the base material, of the UV texture layers 20, the optical coating layers 30 comprise at least one first sub-coating layer 31 and at least one second sub-coating layer 32, the first sub-coating layers 31 and the second sub-coating layers 32 are formed alternately, the refractive index of the first sub-coating layers 31 is smaller than that of the second sub-coating layers 32, the refractive index of the second sub-coating layers 32 is larger than or equal to 3.0, and the structural schematic diagrams can refer to fig. 1-3.
According to the embodiment of the application, the refractive index of the first sub-coating layer is less than or equal to 2.0, and the refractive index of the second sub-coating layer is greater than or equal to 4.0. From this, the sub-coating film layer of second has better refracting index, and the difference of the refracting index between the sub-coating film layer of first sub-coating film layer and second is great, improvement casing subassembly that can be better the metal feel reduces the thickness on the sub-coating film layer of second greatly to with the whole thickness attenuate of optics coating film layer.
In some embodiments, prior to forming the optical coating layer, the method of making a housing assembly further comprises: plasma cleaning is performed on the surface of the UV texture layer. Therefore, the surface activity of the UV texture layer can be improved, and the binding force between the UV texture layer and the optical coating layer is further improved. The cleaning time is not particularly required, and can be flexibly set by a person skilled in the art according to actual conditions, and in some embodiments, the cleaning time can be 1-10 minutes.
According to the embodiment of the application, the material for forming the second sub-coating layer is amorphous silicon or a mixture containing amorphous silicon, the content of silicon in the mixture containing amorphous silicon is more than or equal to 70%, wherein, when the second sub-coating layer is sputtered and deposited, the reaction gas comprises reducing gas, namely the reducing gas is filled into the sputtering device. Therefore, the reducing gas can prevent amorphous silicon from being in contact with gases such as water, oxygen and the like in the deposition process to generate silicon oxide through oxidation reaction, so that the refractive index of the second sub-coating layer is reduced, and the brightness of the shell assembly is influenced. Wherein the reducing gas may be hydrogen. Compared with the existing common coating materials such as titanium oxide and niobium oxide, the coating material adopts amorphous silicon or a mixture containing amorphous silicon, so that the deposition rate can be improved by 50% in the process, the deposition efficiency and yield of the optical coating layer are improved, and the production cost is reduced.
Further, when the second sub-film is deposited, the reaction gas may further include an inert gas (such as argon), that is, the inert gas is filled into the sputtering device to protect the atmosphere of the deposition reaction and avoid the influence of water and oxygen on the amorphous silicon.
According to the embodiment of the application, the material for forming the first sub-coating layer is at least one of silicon dioxide, zirconium dioxide, aluminum oxide and magnesium fluoride, wherein oxygen is filled into the sputtering device when the first sub-coating layer is sputtered and deposited. Therefore, the purity of the material for forming the first sub-coating layer can be further ensured, so that side reaction is avoided, and the brightness and the metal texture of the optical coating layer are prevented from being influenced.
Further, the specific method for depositing and forming the first sub-coating layer and the second sub-coating layer may be physical vapor deposition, chemical vapor deposition, magnetron sputtering, or the like. The method has mature process and high preparation efficiency.
Furthermore, the substrate is adjacent to the first sub-coating layer, so that the brightness and the metal texture of the shell assembly can be better provided.
According to the embodiment of the application, the total thickness of the optical coating layer is less than 800nm, and the brightness L value of the outer surface of the shell component is greater than or equal to 80. Therefore, the optical film layer can provide good brightness for the shell assembly, the appearance effect of the shell assembly is improved, the thickness of the optical film layer is small, and the optical film layer is not prone to cracking when being attached to a base material and under a high-temperature environment.
Furthermore, the total thickness of the optical coating layer is less than or equal to 500nm, and the brightness L value of the outer surface of the shell component is greater than or equal to 90. From this, the optical film layer of this application not only can provide better luminance for casing subassembly, improves casing subassembly's outward appearance effect, and the thickness that further makes optical coating layer simultaneously is thinner, and is all difficult for cracking when laminating and under high temperature environment with the substrate. According to the embodiment of the application, the total number of the first sub-coating layer and the second sub-coating layer is 2-9. Therefore, the skilled person can flexibly set the number of the sub-coating layers according to the requirements on the appearance color of the shell assembly, the thickness of the optical coating layer and the brightness of the shell assembly so as to meet the performance requirement.
According to an embodiment of the present application, referring to fig. 2, the optical coating layer includes four first sub-coating layers 31 and four second sub-coating layers 32, the second sub-coating layer 31 is made of amorphous silicon, the first sub-coating layer 32 is made of silicon dioxide, the first sub-coating layer 31 is closest to the substrate 10, and the second sub-coating layer 32 is farthest from the substrate, wherein the thicknesses of the four first sub-coating layers are 5nm to 15nm, 50nm to 100nm, and 50nm to 100nm, respectively, and the thicknesses of the four second sub-coating layers are 10nm to 20nm, 20nm to 80nm, 30nm to 60nm, and 5nm to 15nm, respectively, in a direction away from the substrate 10. Therefore, the total thickness of the optical coating layer with the structure can be as small as 500nm, even can be smaller than 400nm, and meanwhile, the brightness L value of the appearance surface of the shell assembly can reach more than 90. As will be appreciated by those skilled in the art, the first sub-coating layer 31 and the second sub-coating layer 32 are deposited alternately.
In the preparation method, the second sub-coating layer with higher refractive index is formed, so that the high brightness and strong metal texture of the shell assembly can be realized, the thickness of the second sub-coating layer can be greatly reduced, the overall thickness of the optical coating layer is reduced, the problem of film cracking caused by over-thick thickness is solved, the product yield is improved, the coating time is shortened technically, the utilization rate of equipment is improved, and the production cost is reduced.
According to the embodiment of the application, the method for preparing the shell assembly further comprises the step of forming at least one cover bottom oil film layer 50 on the side, away from the substrate, of the optical coating layer in a silk-screen printing mode, as shown in fig. 3, the color of the cover bottom oil film layer 50 can be white or black, so that protection can be provided for the optical coating layer, and the effects of color and texture can be achieved.
In yet another aspect thereof, the present application provides an electronic device. According to an embodiment of the present application, referring to fig. 5, an electronic device 1000 includes: the housing assembly 100 described above; the display screen assembly 200, the display screen assembly 200 is connected with the shell assembly 100, and an installation space is defined between the display screen assembly 200 and the shell assembly 100; and a main board (not shown in the figure) disposed in the installation space and electrically connected to the display screen assembly. Therefore, the appearance of the shell of the electronic equipment has high brightness, the metal texture of the appearance of the electronic equipment is improved, and the thickness of the shell assembly of the electronic equipment is thin. Those skilled in the art will appreciate that the electronic device has all of the features and advantages of the housing assembly previously described and will not be described in any greater detail herein.
According to the embodiment of the application, the specific type of the electronic device has no special requirement, and a person skilled in the art can flexibly select the electronic device according to actual situations. In some embodiments, specific types of the electronic devices include, but are not limited to, mobile phones (as shown in fig. 5), notebooks, ipads, and kindle, which have a housing.
The terms "first", "second" and "first" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.

Claims (15)

1. A housing assembly, comprising:
a substrate;
a UV texture layer disposed on one side of the substrate;
the optical coating layer is arranged on the surface of the substrate far away from the UV texture layer and comprises at least one first sub coating layer and at least one second sub coating layer, the first sub coating layer and the second sub coating layer are alternately arranged, the refractive index of the first sub coating layer is smaller than that of the second sub coating layer, and the refractive index of the second sub coating layer is larger than or equal to 3.0.
2. The housing assembly of claim 1 wherein the first sub-coating has an index of refraction of 2.0 or less and the second sub-coating has an index of refraction of 4.0 or more.
3. The housing assembly of claim 1, wherein the material of the second sub-coating layer is amorphous silicon or a mixture containing amorphous silicon, and wherein the content of silicon in the mixture containing amorphous silicon is greater than or equal to 70%.
4. The housing assembly of claim 3 wherein the amorphous silicon containing mixture is at least one of Si-C, si-Ge, si-Al, si-Zr, and Si-Nb.
5. The housing assembly of claim 1 wherein the first sub-coating is at least one of silicon dioxide, zirconium dioxide, aluminum oxide and magnesium fluoride.
6. The housing assembly of claim 1 wherein the optical coating has a total thickness of 800nm or less and the housing assembly has an outer surface with a luminance L value of 80 or greater.
7. The housing assembly of claim 6 wherein the optical coating has a total thickness of 500nm or less and the housing assembly has an outer surface with a luminance L value of 90 or more.
8. The housing assembly of any of claims 1-7, wherein the total number of layers of the first and second sub-coatings is 2-9; the substrate is adjacent to one layer of the first sub-coating layer.
9. The housing assembly of claim 8 wherein the optical coating includes four layers of the first sub-coating and four layers of the second sub-coating, the second sub-coating being amorphous silicon and the first sub-coating being silicon dioxide, wherein the four layers of the first sub-coating have thicknesses of 5nm to 15nm, 50nm to 100nm and 50nm to 100nm, respectively, and the four layers of the second sub-coating have thicknesses of 10nm to 20nm, 20nm to 80nm, 30nm to 60nm and 5nm to 15nm, respectively, in a direction away from the substrate.
10. The housing assembly of any one of claims 1 to 7, further comprising a membrane and a primer film layer, wherein the membrane is located between the UV texture layer and the substrate, the membrane and the substrate are attached by OCA optical clear adhesive, and the primer film layer is located on a side of the optical coating layer away from the substrate.
11. A method of making a housing assembly, comprising:
providing a substrate;
forming a UV texture layer on one side of the substrate;
and sputtering and depositing optical coating layers on the surfaces of the UV texture layers far away from the base material, wherein the optical coating layers comprise at least one first sub coating layer and at least one second sub coating layer, the first sub coating layer and the second sub coating layer are alternately formed, the refractive index of the first sub coating layer is smaller than that of the second sub coating layer, and the refractive index of the second sub coating layer is larger than or equal to 3.0.
12. The method of claim 11, wherein the material forming the second sub-coating layer is amorphous silicon or a mixture containing amorphous silicon, the content of silicon in the mixture containing amorphous silicon is 70% or more, and wherein a reducing gas or an inert gas is introduced into a sputtering apparatus during sputter deposition of the second sub-coating layer.
13. The method of claim 11 wherein said first sub-coating is formed from at least one of silicon dioxide, zirconium dioxide, aluminum oxide and magnesium fluoride, and wherein oxygen is introduced into a sputtering apparatus during sputter deposition of said first sub-coating.
14. The method of claim 11 wherein said substrate is contiguous with a layer of said first subcoat, said optical coating having a total thickness of 500nm or less.
15. An electronic device, comprising:
the housing assembly of claims 1-10;
the display screen assembly is connected with the shell assembly, and an installation space is defined between the display screen assembly and the shell assembly; and
the mainboard sets up in the installation space and with display screen assembly electricity is connected.
CN202210786494.5A 2022-07-04 2022-07-04 Shell assembly, preparation method thereof and electronic equipment Pending CN115209656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210786494.5A CN115209656A (en) 2022-07-04 2022-07-04 Shell assembly, preparation method thereof and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210786494.5A CN115209656A (en) 2022-07-04 2022-07-04 Shell assembly, preparation method thereof and electronic equipment

Publications (1)

Publication Number Publication Date
CN115209656A true CN115209656A (en) 2022-10-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210786494.5A Pending CN115209656A (en) 2022-07-04 2022-07-04 Shell assembly, preparation method thereof and electronic equipment

Country Status (1)

Country Link
CN (1) CN115209656A (en)

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