CN108594936B

CN108594936B - Electronic device, shell thereof and manufacturing method of shell

Info

Publication number: CN108594936B
Application number: CN201810336447.4A
Authority: CN
Inventors: 杨光明
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-04-12
Filing date: 2018-04-12
Publication date: 2020-10-02
Anticipated expiration: 2038-04-12
Also published as: CN108594936A

Abstract

The application discloses a shell of an electronic device, which comprises a plastic substrate, a bonding layer arranged on the plastic substrate, an optical film layer arranged on the bonding layer, an anti-corrosion layer arranged on the optical film layer, a color paint layer arranged on the anti-corrosion layer and a finish paint layer arranged on the color paint layer; wherein, anchor coat layer, anti-corrosion layer, look lacquer layer and finish paint layer are the light-permeable material, and the optics rete includes through sputtering or the at least one deck metal oxide layer of coating by vaporization technology formation on the anchor coat, and this application still discloses the manufacturing approach of an electron device and casing thereof, and through above-mentioned mode, this application can improve the penetrating sense of casing and be convenient for the diversified design of casing colour.

Description

Electronic device, shell thereof and manufacturing method of shell

Technical Field

The present invention relates to the field of electronic devices, and in particular, to an electronic device, a housing thereof, and a method for manufacturing the housing.

Background

At present, with the development of science and technology, electronic devices such as smart phones and the like are gradually becoming necessities of life of people.

The housing is an essential component of an electronic device, and when the electronic device such as a smart phone is initially created, a metal housing is mainly used, but the metal housing has a strong thermal conductivity, so that a user feels a strong temperature when holding the device, and the metal housing has a high cost, so that a plastic housing gradually replaces the metal housing to become a mainstream. However, the plastic shell has a dull color, no permeability, poor color gradation and poor color adjustability, and how to improve the permeability, the color gradation and the color adjustability of the plastic shell and how to realize the visual effects of ceramics and glass by adopting a simpler process become the focus of attention of various manufacturers.

Disclosure of Invention

The embodiment of the application adopts a technical scheme that: the shell of the electronic device comprises a plastic substrate, a bonding layer arranged on the plastic substrate, an optical film layer arranged on the bonding layer, a corrosion-resistant layer arranged on the optical film layer, a color paint layer arranged on the corrosion-resistant layer and a finish paint layer arranged on the color paint layer; the optical film layer comprises at least one metal oxide layer formed on the bonding layer through a sputtering or evaporation process.

Another technical scheme adopted by the embodiment of the application is as follows: provided is a method of manufacturing a case of an electronic device, the method including: forming a bonding layer on a plastic substrate; forming an optical film layer on the bonding layer; forming a resist layer on the optical film layer; forming a colored paint layer on the resist layer; forming a finish paint layer on the color paint layer; wherein the bonding layer, the color paint layer, the anti-corrosion layer and the surface paint layer are all made of light-permeable materials, and the optical film layer comprises at least one metal oxide layer formed on the bonding layer by sputtering or evaporation process

Another technical scheme adopted by the embodiment of the application is as follows: an electronic device is provided, which comprises a device main body and a shell for protecting the device main body, wherein the shell is the shell.

The shell comprises a plastic substrate, a bonding layer arranged on the plastic substrate, an optical film layer arranged on the bonding layer, a corrosion-resistant layer arranged on the optical film layer, a color paint layer arranged on the corrosion-resistant layer and a finish paint layer arranged on the color paint layer; wherein, anchor coat layer, anti-corrosion layer, look lacquer layer and finish paint layer are the light-permeable material, and the optics rete includes through sputtering or at least one deck metal oxide layer of coating by vaporization technology formation on the anchor coat, and the electron device's of this application casing can realize the imitative pottery and the glass effect of light color, can realize the imitative ceramic effect of dark again, and the colour adjustability is strong, and the outward appearance is more penetrating.

Drawings

Fig. 1 is a schematic structural diagram of a housing of an electronic device according to a first embodiment of the present application;

FIG. 2 is a schematic view of a plastic substrate according to an embodiment of the present disclosure

Fig. 3 is a schematic structural diagram of a housing of an electronic device according to a second embodiment of the present application;

fig. 4 is a schematic flowchart of a method of manufacturing a case of an electronic device according to a first embodiment of the present application;

fig. 5 is a schematic flow chart illustrating a method for manufacturing a housing of an electronic device according to a second embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

With the high development of electronic devices such as smart phones, tablet computers, wearable smart devices, and the like, the electronic devices almost reach a bottleneck in performance, and functions are increasingly diversified and unified. As a result, users are more inclined to pursue the appearance, touch, and the like of the electronic device, which puts higher demands on the housing of the electronic device.

On the other hand, the control of the production cost of electronic devices is also the subject of constant production of manufacturers, and for example, for many years, the change of electronic devices from metal housings to plastic housings has been reflected sufficiently in pursuit of quality, and the control of the production cost has been essential.

Therefore, how to adopt a simple structure and process to realize the shells of the plastic imitation ceramics and the glass, and the indexes of transparency, strong layering and strong color adjustability can be realized, which becomes a focus of attention of various manufacturers.

It will be appreciated that there is no regularity to which the effect of imitation ceramic and imitation glass can be followed whilst achieving a sense of transparency, the effect achieved is often unpredictable and the issues of firmness of the bond between layers and colour-biting need to be taken into account.

The inventor of the application discovers through a large number of experiments that when the sequentially laminated structure of the plastic substrate, the colored paint layer, the combining layer, the optical film layer, the anti-corrosion layer and the finish paint layer is adopted, the color of the laminated structure is especially transparent, the vivid ceramic-like effect is realized, and the expected effect is exceeded.

Furthermore, the existing optical film layer of electroplated metal is blue regardless of the thickness of the plated film, so that the realization of a light color effect is seriously influenced; in particular, the inventor of the present application has discovered that, when a metal oxide layer and a colored paint layer formed by sputtering are matched, the color is more transparent and is closer to the visual effect of ceramics, and when a structure in which a plastic substrate, a bonding layer, an optical film layer, an anti-corrosion layer, a colored paint layer and a finish paint layer are sequentially laminated is adopted, the effect is particularly obvious, and the problem of color biting or insecure bonding cannot occur between the layers.

The specific structure and manufacturing method of the housing of the electronic device of the present application can be referred to the following description.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a housing of an electronic device according to a first embodiment of the present application. In this embodiment, the housing of the electronic device may include a plastic substrate 11, a bonding layer 12, an optical film layer 13, a resist layer 14, a color paint layer 15, and a topcoat layer 16, which are sequentially stacked.

Alternatively, the plastic substrate 11 may be a light permeable material. Of course, the plastic substrate 11 may be made of a material that is opaque to light.

Alternatively, the plastic substrate 11 may be a PC material (Polycarbonate), and the transparency may be 90% or more.

In other embodiments, the plastic substrate 11 may also be a PMMA (Polymethyl Methacrylate) material, which has excellent optical properties and temperature change resistance, and the white light transmittance is as high as 92%. The plastic substrate 11 may also be PET, i.e., polyethylene terephthalate, which is a milky white or pale yellow highly crystalline polymer with a smooth and glossy surface and a transparency of 86%. The plastic substrate 11 can also be another plastic, which is not listed here.

The bonding layer 12 is formed on the surface of the plastic substrate 11. The bonding layer 12 may have a thickness of 20-25 microns. The optical film layer 13 cannot be formed directly on the plastic base material 11, and the bonding layer 12 functions as a substrate for forming the optical film layer 13 later, so that the optical film layer 13 and the color paint layer 12 can be tightly bonded together through the bonding layer 12.

Alternatively, the bonding layer 12 may be a UV coating layer 12.

In this embodiment, the UV coating layer 12 may be formed in the following manner: and spraying a UV coating on the plastic substrate 11, leveling the UV coating on the plastic substrate 11 for a period of time, and curing by using ultraviolet light to form the UV coating layer 12. The surface of the UV coating layer 12 formed in this way can produce a smooth mirror effect and has a certain hardness. An optical adhesive layer can be further coated on the surface of the UV coating layer 12 to increase the roughness of the surface of the UV coating layer 12, or N, N-dimethylformamide with a certain concentration can be doped in the UV coating layer 12, so that the surface of the UV coating layer 12 has micropores, and the optical film layer 13 formed on the UV coating layer 12 subsequently is combined more tightly without rainbow stripes.

In other embodiments, the specific formation manner of the UV coating layer 12 may also be: the UV coating layer 12 is vapor-deposited on the plastic substrate 11. The surface smoothness of the UV coating layer 12 formed by evaporation is lower than that of spraying, so that the optical film layer 13 formed on the UV coating layer 12 formed by evaporation is combined more tightly, and rainbow stripes cannot be generated.

The optical film layer 13 is formed on the surface of the bonding layer 12 facing away from the plastic substrate 11.

The optical film layer 13 includes at least one metal oxide layer, such as a first titanium oxide layer, a second titanium oxide layer, an aluminum oxide layer, a single crystal zirconium dioxide layer, or the like, described later, formed on the bonding layer 12 by a sputtering or evaporation process.

In this embodiment, the optical film layer 13 may include a refractive film layer 131 and a light-transmittable hardness enhancing layer 132, which are sequentially stacked and disposed on a surface of the bonding layer 12 facing away from the plastic substrate 11.

The refraction film layer 131 is used for refracting the light passing through the refraction film layer 131. The refractive film layer 131 may have a multi-layer structure, and refractive indexes between each two adjacent film layers of the refractive film layer 131 are different.

Alternatively, the refractive film layer 131 may include a first titanium oxide layer 131a, a silicon oxide layer 131b, and a second titanium oxide layer 131c, which are sequentially stacked and disposed on a surface of the bonding layer 12 facing away from the plastic substrate 11.

It should be understood that the lamination order of the refractive film layer 131 is not limited to the above manner, and different housing visual effects can be achieved by adjusting the lamination order of titanium oxide and silicon oxide in the refractive film layer 131. For example, the refractive film layer 131 may further include a silicon oxide layer, a titanium oxide layer, and a silicon oxide layer, which are sequentially stacked. In addition, different visual and color effects can also be achieved by adjusting the film thickness of each of the refractive film layers 131.

Alternatively, the first titanium oxide layer 131a may be a titanium dioxide layer or a triple titanium pentoxide layer, the second titanium oxide layer 131c may be a titanium dioxide layer or a triple titanium pentoxide layer, and the silicon oxide layer 131b may be a silicon dioxide layer.

Alternatively, the hardness enhancing layer 132 may be a layer of alumina or a layer of single crystal zirconia.

The hardness strengthening layer 132 serving as the outermost layer of the optical film layer 13 can protect the optical film layer 13, so that the manufactured shell finished product has higher hardness, strong bending resistance and difficult surface scratch.

The resist layer 14 is formed on the surface of the optical film layer 13 facing away from the plastic substrate 11. The function of the anti-corrosion layer 14 is to prevent the subsequently formed colored paint layer 15 from corroding the optical film layer 13 to avoid the occurrence of color biting to cause the occurrence of miscellaneous marks on the shell finished product, and on the other hand, the anti-corrosion layer 14 can generate strong adhesive force, so that the subsequently formed colored paint layer 15 is firmly combined with the optical film layer 13 through the anti-corrosion layer 14.

Alternatively, the resist layer 14 may be a PU paint layer 14. The resist layer 14 may have a thickness of 5-10 microns. For example, the thickness of the resist layer 14 may be 8 microns, or may be 5 microns or 10 microns.

In this embodiment, the PU coating layer 14 may be formed in the following manner: spraying PU coating on the optical film layer 13; leveling the poly PU coating for a period of time; baking to dry the PU coating to form a poly PU coating layer 14.

In other embodiments, the PU paint layer 14 may be formed on the optical film layer 13 by evaporation.

A layer of lacquer 15 is formed on the surface of the resist layer 14 facing away from the plastic substrate 11.

The material of the color paint layer 15 comprises nano color paste, PU coating and silicon dioxide particles, and the average grain diameter of the silicon dioxide particles is less than 100 nanometers.

The color paint layer 15 is formed on the resist layer 14 by spraying or evaporating the material of the color paint layer 15, for example. The paint of the color paint layer 15 comprises 71.5 to 81.5 weight percent of PU paint, 5.1 to 8.1 weight percent of nanometer color paste and 3.1 to 6.1 weight percent of silicon dioxide particles.

The preparation steps of the coating of the colored paint layer 15 may be: mixing 71.5-81.5% of PU paint and 3.1-6.1% of silica particles fully to form PU paint doped with silica particles; then 5.1 to 8.1 percent of nano color paste is fully mixed with the PU coating doped with silicon dioxide particles to obtain the coating of the colored paint layer 15.

The manner of forming the colored lacquer layer 15 on the resist layer 14 may specifically be: firstly, the paint of the colored paint layer 15 is sprayed on the anti-corrosion layer 14; after leveling the coating for a period of time, it is cured by baking to form a layer of varnish 15.

The silica particles are uniformly distributed in the colour lacquer layer 15.

A top coat layer 16 is formed on the surface of the pigmented paint layer 15 facing away from the plastic substrate 11.

Alternatively, the material of the topcoat layer 16 may include a UV coating and titanium dioxide particles having an average particle size of less than 100 nanometers. The thickness of the topcoat layer 16 may be 20-25 microns.

The titanium dioxide particles are uniformly distributed over the top coat layer 16.

Alternatively, the coating of the topcoat layer 16 may be prepared by: the topcoat 16 coating is obtained by uniformly mixing 81.5-85.5% by weight of the UV coating with 5.1-7.1% by weight of the titanium dioxide particles.

In the present embodiment, the finishing paint layer 16 may be formed by: spraying the prepared paint of the finish paint layer 16 on the colored paint layer 15; leveling the coating for a period of time; the paint of the top coat layer 16 on the pigmented paint layer 15 is cured by ultraviolet light irradiation to form the top coat layer 16.

Optionally, the leveling time (e.g., the second length of time) when the topcoat layer 16 is formed is greater than the leveling time (e.g., the first length of time) when the tie layer 12 is formed. As previously mentioned, if the bonding layer 12 is too smooth and the final shell product will have rainbow marks, by controlling the leveling time of the bonding layer 12 to be relatively short, the bonding layer 12 can be prevented from being too smooth, and thus the occurrence of rainbow marks can be avoided. In particular, the inventors of the present application have discovered, by chance, that the shell product is hardly iridescent when the first period of time is less than half the second period of time.

In this embodiment, by doping the color coat layer 15 with silica particles and doping the topcoat layer 16 with titania particles, the effect of increasing the shell projectability can be achieved due to the different refractive indices of titania and silica. In addition, the titanium dioxide particles can purify the dirt on the surface of the shell under the action of ultraviolet light and have a bactericidal effect on the surface of the shell under the action of the finishing paint layer 16.

In this embodiment, the bonding layer 12, the resist layer 14, and the color paint layer 15 are all made of a light-permeable material.

The present embodiment can achieve the effect of transparent imitation ceramic and imitation glass by providing a housing comprising a plastic substrate 11, a bonding layer 12, an optical film layer 13, an anti-corrosion layer 14, a colored paint layer 15, and a finish paint layer 16, which are laminated in this order. The metal oxide layers (the refraction film layer 141 and the hardness strengthening layer 142) can be formed by adopting sputtering and evaporation processes through matching of colors of different colored paint layers 15, and the effect of abundant deep color or light color imitation glass and ceramic is achieved.

Particularly, in the present embodiment, when the color paint layer 15 is light, the refraction film layer 131 and the hardness enhancing layer 132 are matched to achieve the effect of imitating glass and ceramic with light color.

Alternatively, in the present embodiment, the thickness of the bonding layer 12 is greater than or equal to twice the thickness of the resist layer 14. The inventors of the present application have discovered that when the thickness of the bonding layer 12 is equal to or greater than twice the thickness of the resist layer 14, a case having a very strong transparency can be realized by combining the case laminate structure described above, and the transparency of the case can be brought closer to that of ceramics.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a plastic substrate according to an embodiment of the present application. In one embodiment of the present application, the plastic substrate 11 may include a first plastic layer 111 and a second plastic layer 112, the first plastic layer 111 and the second plastic layer 112 being stacked, the second plastic layer 112 being a layer relatively close to the bonding layer 12. The first plastic layer 111 and the second plastic layer 112 are both made of light-permeable material.

The thickness of the first plastic layer 111 is greater than the thickness of the second plastic layer 112, and the refractive index 111 of the second plastic layer is greater than the refractive index of the first plastic layer 112. The reflection performance of the surface of the plastic base material 11 close to the bonding layer 12 can be increased, so that the reflection performance of the plastic base material 11 serving as a base is relatively strong, and the reflected light achieves a transparent visual effect through the bonding layer 12, the optical film layer 13, the anti-corrosion layer 14, the colored paint layer 15 and the finish paint layer 16.

Alternatively, the material of the first plastic layer 111 may be PMMA, and the material of the second plastic layer 112 may be PC.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a housing of an electronic device according to a second embodiment of the present application.

The difference from the case of the electronic device of the first embodiment of the present application is that the optical film layer 23 of the case of the present embodiment further includes a light permeable color modulation layer 233 laminated with the refractive film layer 231.

Optionally, a color permeable layer 233 is disposed between the refractive film layer 231 and the bonding layer 22.

It is understood that the stacking order between the light permeable color modulation layer 233 and the other layers of the optical film layer 23 may be other, for example, the light permeable color modulation layer 233 may be disposed between the refractive film layer 231 and the hardness enhancing layer 232.

Alternatively, the light-transmissive color-modulating layer 233 may be an oxide layer of indium, an oxide layer of tin, or an oxide layer of indium tin. For example, the indium oxide layer may be an indium oxide layer, the tin oxide layer may be a tin dioxide layer, and the indium tin oxide layer may be an indium tin oxide layer.

It should be noted that the inventors of the present application have discovered that, in combination with the above-described structure of the present application, when the light-permeable color-control layer is formed of an indium oxide layer, a tin oxide layer, or a laminate of the two, a dark colored paint layer 25 is used, a particularly clear and glossy ceramic effect can be achieved.

The color collocation of refraction rete 231 and color paint layer 25 is passed through to this embodiment, and further the color collocation with light-permeable color mixing layer 233 again, can realize abundant colour, and the colour adjustability is strong, and the colour is more penetrating, and the colour has the degree of depth and feels.

Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a method for manufacturing a housing of an electronic device according to a first embodiment of the present application.

In this embodiment, the method for manufacturing the housing of the electronic device may include the steps of:

step 101: a plastic substrate is provided.

The description of the plastic substrate 11 can be found in the above description and will not be repeated here.

Step 102: the bonding layer is formed on the plastic substrate by a spray coating process.

The forming of the bonding layer 12 on the plastic substrate 11 by the spray coating process may specifically include the following steps: spraying a UV coating on the plastic substrate 11; leveling the UV coating on the plastic substrate 11 for a period of time; irradiating the UV paint with ultraviolet light means curing to form the bonding layer 13.

Step 103: an optical film layer including at least one metal oxide layer is formed on the bonding layer by a sputtering process.

The specific laminated structure of the

optical film layer

13 or 23 may refer to the above description, and is not described herein again. The sputtering process may be a magnetron sputtering process, for example, sputtering a metal target in an oxygen atmosphere to react the metal with oxygen and to form a metal oxide layer on the surface of the corresponding substrate. The metal oxide layer includes an indium oxide layer, a tin oxide layer, an indium tin oxide layer, an aluminum oxide layer, and a single crystal zirconium dioxide layer of the titanium oxide layer in any of the above embodiments.

When a silicon dioxide layer is formed by sputtering, the silicon dioxide can be directly used as a target material to carry out vacuum sputtering; the silicon monoxide can also be used as a target material to carry out reactive sputtering under an oxygen environment.

Step 104: a resist layer is formed on the optical film layer by a spray coating process.

The formation of the resist layer 14 on the optical film layer 13 by the spray coating process may specifically include the following steps: spraying PU coating on the optical film layer 13; leveling the PU coating for a period of time; baking to dry the PU coating to form the PU coating layer 15.

Step 105: a colored paint layer is formed on the resist layer by a spray coating process.

The preparation steps of the paint of the colored paint layer 15 can be as follows: mixing 71.5-81.5% of PU paint and 3.1-6.1% of silica particles fully to form PU paint doped with silica particles; then 5.1 to 8.1 percent of nano color paste is fully mixed with the PU coating doped with silicon dioxide particles to obtain the coating of the colored paint layer 15.

Step 106: and forming a finish paint layer on the colored paint layer through a spraying process.

The coating of the topcoat layer 16 may be prepared by: the topcoat 16 coating is obtained by uniformly mixing 81.5-85.5% by weight of the UV coating with 5.1-7.1% by weight of the titanium dioxide particles.

In the present embodiment, the finishing paint layer 16 may be formed by: spraying the prepared paint of the finish paint layer 16 on the colored paint layer 15; leveling the coating for a period of time; the paint of the top coat layer 16 on the pigmented paint layer 15 is cured by ultraviolet light irradiation to form the top coat layer 16. Wherein the leveling time to form the topcoat layer 16 is greater than the leveling time to form the tie layer 12.

In the embodiment, the bonding layer, the anti-corrosion layer, the colored paint layer and the finish paint layer are formed through a spraying process, the surfaces of the layers are relatively smooth, so that the prepared shell finished product is stronger in glossiness, strong in process consistency, less in required equipment and simple in process. The optical film layer with the metal oxide laminated structure is formed through a sputtering process, so that the color of the optical film layer is more transparent after the optical film layer is matched with the colored paint layer.

Referring to fig. 5, fig. 5 is a schematic flow chart illustrating a method for manufacturing a housing of an electronic device according to a second embodiment of the present application.

step 201: a plastic substrate is provided.

Step 202: the bonding layer is formed on the colored paint layer by an evaporation process.

The forming process of the bonding layer 12 may specifically be: the UV coating is evaporated by an evaporation apparatus and cooled to cure the UV material on the plastic substrate 11 to form the bonding layer 12.

Step 203: and forming an optical film layer on the bonding layer by an evaporation process.

The evaporation process of the silicon dioxide layer can be as follows: firstly, a layer of silicon dioxide coating film is evaporated on a base layer corresponding to vacuum evaporation equipment, and before the step, the furnace environment of the vacuum evaporation equipment can be vacuumized to improve the purity of the gas environment; the coating material of silicon oxide is placed on an electrode, oxygen is introduced, the electrode is electrified and heated to the vaporization temperature under the high-pressure environment, the silicon oxide is oxidized into silicon dioxide after being vaporized and gasified, and the silicon dioxide is condensed on the surface of a corresponding base layer to form a silicon dioxide coating.

The step of forming the titanium dioxide layer by evaporation can be as follows: the coating material of the titanium pentoxide is placed on an electrode, oxygen is also introduced, the electrode is electrified under a certain oxygen pressure environment and heated to the vaporization temperature, the titanium pentoxide is oxidized into titanium dioxide by the oxygen after being vaporized and gasified, and the titanium dioxide is condensed on a corresponding base layer to form a titanium dioxide layer.

It will be appreciated that other metal oxides may be similarly evaporated.

Step 204: a resist layer is formed on the optical film layer by an evaporation process.

The specific formation steps of the resist layer 14 may be: the PU coating is evaporated by an evaporation apparatus, and the PU material is cured on the optical film layer 13 by cooling to form a resist layer 14.

Step 205: a colored paint layer is formed on the resist layer by an evaporation process.

The specific forming steps of the colored paint layer 15 may be: the material of the colored paint layer 15 is evaporated by an evaporation apparatus, and the material of the colored paint layer 15 is solidified on the resist layer 14 by cooling to form the colored paint layer 15. The material of the color paint layer 15 and the method for making the same can be referred to the above description, and are not described herein again.

Step 206: and forming a finish paint layer on the colored paint layer through a spraying process.

The description of step 206 may be referred to above, and is similar to step 106, and is not repeated here.

In this embodiment, each film layer is formed by evaporation, so that the continuity of the process can be improved, the evaporation does not need the leveling time, and the production efficiency can be improved.

The electronic device of the embodiment of the application can comprise a shell and a device body, and the shell can protect or surround the device body. The electronic device may be a smartphone, a tablet computer, a wearable smart device, or the like. The case is not limited to a battery cover, a front case, a rear case, a middle frame, etc.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims

1. A shell of an electronic device is characterized by comprising a plastic substrate, a bonding layer arranged on the plastic substrate, an optical film layer arranged on the bonding layer, an anti-corrosion layer arranged on the optical film layer, a color paint layer arranged on the anti-corrosion layer and a finish paint layer arranged on the color paint layer; the optical film layer comprises at least one metal oxide layer formed on the bonding layer through a sputtering or evaporation process;

the plastic base material comprises a first plastic layer and a second plastic layer, the first plastic layer and the second plastic layer are arranged in a laminated mode, the second plastic layer is a layer which is relatively close to the combining layer, the thickness of the first plastic layer is larger than that of the second plastic layer, the refractive index of the second plastic layer is larger than that of the first plastic layer, the combining layer is a UV coating layer formed by spraying UV coating on the plastic base material and enabling the UV coating on the plastic base material to be cured by utilizing ultraviolet light after the UV coating on the plastic base material is leveled for a period of time; the color paint layer is formed by spraying a color paint layer on the anti-corrosion layer, leveling the paint for a period of time and then curing the material of the color paint layer on the anti-corrosion layer in a baking mode; the top paint layer is formed by spraying paint of the top paint layer on the colored paint layer, leveling the paint for a period of time and then curing the paint of the top paint layer on the colored paint layer by ultraviolet irradiation; the leveling time when the finishing paint layer is formed is longer than the leveling time when the bonding layer is formed, wherein silicon dioxide particles are doped in the material of the color paint layer, titanium dioxide particles are doped in the paint of the finishing paint layer, and the thickness of the bonding layer is larger than or equal to twice the thickness of the anti-corrosion layer.

2. The housing of claim 1, wherein the optical film layer comprises at least a refractive film layer comprising a first titanium oxide layer, a silicon oxide layer, and a second titanium oxide layer arranged in a stack.

3. The housing of claim 1, wherein the resist layer is a PU paint layer.

4. The housing of claim 2 wherein the optical film layer further comprises a light transmissive hardness enhancing layer disposed in a stack with the refractive film layer, the hardness enhancing layer being disposed on a surface of the refractive film layer facing away from the plastic substrate.

5. The housing of claim 4 wherein the hardness strengthening layer is an aluminum oxide layer or a single crystal zirconium dioxide layer.

6. The housing of claim 1, wherein the thickness of the color paint layer is 8-12 microns, the thickness of the bonding layer is 20-25 microns, the thickness of the resist layer is 5-10 microns, and the thickness of the topcoat layer is 20-25 microns.

7. A method of manufacturing a housing for an electronic device, the method comprising:

forming a bonding layer on a plastic substrate;

forming an optical film layer on the bonding layer;

forming a resist layer on the optical film layer;

forming a colored paint layer on the resist layer;

forming a top coat layer on the color coat layer;

the optical film layer comprises at least one metal oxide layer formed on the bonding layer through a sputtering or evaporation process;

wherein the step of forming the plastic substrate comprises: arranging a second plastic layer on the first plastic layer, wherein the thickness of the first plastic layer is larger than that of the second plastic layer, and the refractive index of the second plastic layer is larger than that of the first plastic layer;

a step of forming a bonding layer on a plastic substrate, comprising:

spraying UV coating on the plastic substrate, leveling the UV coating on the plastic substrate for a period of time, and curing by utilizing ultraviolet light to form a UV coating layer;

a step of forming a color paint layer on the resist layer, comprising:

spraying a material of a colored paint layer on the anti-corrosion layer, and leveling the material of the colored paint layer for a period of time; curing the material of the color paint layer on the anti-corrosion layer by baking to form the color paint layer;

a step of forming a topcoat layer on the basecoat layer, comprising:

spraying the paint of the finish paint layer on the colored paint layer; leveling the coating of the topcoat layer for a period of time; curing the paint of the finish paint layer on the colored paint layer by utilizing ultraviolet irradiation to form the finish paint layer;

wherein, the material of the color paint layer is doped with silicon dioxide particles, the coating of the finish paint layer is doped with titanium dioxide particles, and the thickness of the bonding layer is more than or equal to two times of the thickness of the anti-corrosion layer.

8. An electronic device, characterized in that the electronic device comprises a device body and a casing for protecting the device body, wherein the casing is the casing according to any one of claims 1 to 6.