CN108638728B

CN108638728B - Electronic device, shell thereof and manufacturing method of shell

Info

Publication number: CN108638728B
Application number: CN201810327146.5A
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: 2020-12-04
Anticipated expiration: 2038-04-12
Also published as: CN108638728A

Abstract

The application discloses a shell of an electronic device, which comprises a plastic substrate, a first bonding layer arranged on the plastic substrate, an optical film layer arranged on the first bonding layer, a colored paint layer arranged on the optical film layer, a second bonding layer arranged on the colored paint layer and a finish paint layer arranged on the second bonding layer; wherein, first bonding layer, colored paint layer, second bonding 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 first bonding layer, and this application still discloses a manufacturing approach and an electron device of casing, and through above-mentioned mode, this application can improve the penetrating sense of casing and the diversified design of the casing colour of being convenient for.

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: providing a shell of an electronic device, wherein the shell comprises a plastic substrate, a first bonding layer arranged on the plastic substrate, an optical film layer arranged on the first bonding layer, a colored paint layer arranged on the optical film layer, a second bonding layer arranged on the colored paint layer and a finish paint layer arranged on the second bonding layer; the first bonding layer, the colored paint layer, the second bonding layer and the finish paint layer are all made of light-permeable materials, and the optical film layer comprises at least one metal oxide layer formed on the first 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 first bonding layer on a plastic substrate; forming an optical film layer on the first bonding layer; forming a colored paint layer on the optical film layer; forming a second bonding layer on the color paint layer; forming a topcoat layer on the second bonding layer; the first bonding layer, the colored paint layer, the second bonding layer and the finish paint layer are all made of light-permeable materials, and the optical film layer comprises at least one metal oxide layer formed on the first bonding layer through a sputtering or evaporation process.

Another technical scheme adopted by the embodiment of the application is as follows: an electronic device is provided, which includes a device main body and a case for protecting the device main body, the case being described above.

The shell provided with the electronic device comprises a plastic substrate, a first bonding layer arranged on the plastic substrate, an optical film layer arranged on the first bonding layer, a colored paint layer arranged on the optical film layer, a second bonding layer arranged on the colored paint layer and a finish paint layer arranged on the second bonding layer; wherein, first bonding layer, colored paint layer, second bonding 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 first bonding layer, and the imitative pottery and the glass effect of light colour can be realized to the electron device's of this application casing, can realize dark imitative ceramic effect 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 structural diagram of a housing of an electronic device according to a second embodiment of the present application;

fig. 3 is a schematic flow chart of a method of manufacturing a case of an electronic device according to a first embodiment of the present application;

fig. 4 is a schematic flowchart of 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 first combination layer, the optical film layer, the colored paint layer, the second combination 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 finds that, accidentally, when the plastic substrate, the metal oxide layer formed by sputtering and the colored paint layer are assembled, the color is more transparent and is closer to the visual effect of ceramic, and when the sequentially laminated structure of the plastic substrate, the first bonding layer, the optical film layer, the colored paint layer, the second bonding layer and the finish paint layer is adopted, the effect is particularly obvious, and the problem of color biting or infirm 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 first bonding layer 12, an optical film layer 13, a color paint layer 14, a second bonding 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 first bonding layer 12 is formed on the surface of the plastic substrate 11. The thickness of the first bonding layer 12 may be 20-25 microns. The optical film layer 13 cannot be formed directly on the plastic base material 11, and the first bonding layer 12 functions as a substrate for forming the subsequent optical film layer 13, so that the optical film layer 13 and the color paint layer 14 can be tightly bonded together by the first bonding layer 12.

Alternatively, the first bonding layer 12 may be the first UV coating layer 12. The first bonding layer 12 is made of a light-permeable material.

In this embodiment, the first 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 a first UV coating layer 12. The surface of the first UV coating layer 12 formed in this way can produce a smooth mirror effect and has a certain hardness. An optical glue layer can be further coated on the surface of the first UV coating layer 12 to increase the roughness of the surface of the first UV coating layer 12, or N, N-dimethylformamide with a certain concentration can be doped in the first UV coating layer 12, so that micropores are formed on the surface of the first UV coating layer 12, the optical film layer 13 formed on the first UV coating layer 12 formed by evaporation is combined more tightly, and rainbow patterns cannot be generated.

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

The optical film layer 13 is formed on a surface of the first 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 silicon oxide layer, a second titanium oxide layer, an aluminum oxide layer, a single crystal zirconium dioxide layer, etc., described later, formed on the first bonding layer 12 by a sputtering or evaporation process.

In the present embodiment, the optical film layer 13 may include a magnesium difluoride layer 131, a refractive film layer 132 and a light-transmissive hardness enhancing layer 133, which are sequentially stacked and disposed on a surface of the first bonding layer 12 facing away from the plastic substrate 11.

The magnesium fluoride layer 131 can increase the transmission performance of the housing, and the magnesium fluoride layer 131 is more stable by arranging the magnesium fluoride layer 131 on the innermost layer of the optical film layer 13, so that substances harmful to human bodies cannot be generated.

The refractive film layer 132 is used for refracting the light passing through the refractive film layer 132.

Alternatively, the refractive film layer 132 may include a first titanium oxide layer 132a, a silicon oxide layer 132b, and a second titanium oxide layer 132c, which are sequentially stacked and disposed on a surface of the magnesium difluoride layer 131 facing away from the plastic substrate 11.

It should be understood that the lamination order of the refractive film layer 132 is not limited to the above manner, and different refractive effects may be achieved by adjusting the lamination order of titanium oxide and silicon oxide in the refractive film layer 132. For example, the refractive film layer 132 may further include a silicon oxide layer, a titanium oxide layer, and a silicon oxide layer, which are sequentially stacked. In addition, different color effects can also be achieved by adjusting the film thickness of each of the refractive film layers 132.

Alternatively, the first titanium oxide layer 132a may be a titanium dioxide layer or a triple titanium pentoxide layer, the second titanium oxide layer 132c may be a titanium dioxide layer or a triple titanium pentoxide layer, and the silicon oxide layer 132b may be a silicon dioxide layer.

Alternatively, the hardness enhancing layer 133 may be an aluminum oxide layer or a single crystal zirconium dioxide layer.

The hardness strengthening layer 133 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 magnesium fluoride layer 131, the first titanium oxide layer 132a, the silicon oxide layer 132b, the second titanium oxide layer 132c, and the hardness enhancing layer 133 are formed by sputtering or evaporation.

The color paint layer 14 is formed on the optical film layer 13. The color paint layer 14 is made of light-permeable material.

Alternatively, the color paint layer 14 may be formed on the optical film layer 13 through a spray coating process. The color paint layer 14 may be black, white, gray, red, blue, etc.

In other embodiments, the color paint layer 14 may also be formed on the optical film layer 13 by evaporation. Compared with the process of UV transfer printing ink, the forming process of the colored paint layer 14 is simpler through the evaporation or spraying process, the production efficiency is improved, the production cost is saved, and the industrial manufacturing of the shell is facilitated.

The color paint layer 14 may be a baking type color paint, i.e., cured by baking after the color paint is sprayed on the optical film layer 13.

Alternatively, the thickness of the color lacquer layer 14 may be 8-12 microns, in particular 10 microns, but also 8 microns or 12 microns.

Optionally, the color paint layer 14 at least comprises 40-45 wt% of polymethyl methacrylate, 35-40 wt% of isooctyl methacrylate, and 5-10 wt% of nano color paste.

If the phenomenon of stinging the colour can appear on optical film layer 13 in the direct formation of current colored paint, the colored paint coating of this application embodiment through the configuration above-mentioned proportion can avoid the erosion of colored paint layer 14 to optical film layer 13, and the laminated structure of the casing of collocation this application embodiment can realize penetrating sense strong casing.

A second bonding layer 15 is formed on the surface of the pigmented paint layer 14 facing away from the plastic substrate 11. The second bonding layer 15 provides strong adhesion so that the subsequently formed topcoat layer 16 is firmly bonded to the basecoat layer 14 through the second bonding layer 15.

Alternatively, the second bonding layer 15 may be a PU paint layer 15. The thickness of the second bonding layer 15 may be 5 to 10 micrometers. For example, the thickness of the second bonding layer 15 may be 8 micrometers, or may be 5 micrometers or 10 micrometers.

In this embodiment, the PU coating layer 15 may be formed in the following manner: spraying polyurethane paint on the colored paint layer 14; leveling the polyurethane coating for a period of time; baking to dry the PU coating to form the PU coating layer 15.

In other embodiments, the PU paint layer 15 may be formed on the color paint layer 14 by evaporation.

A topcoat layer 16 is formed on the surface of the second bonding layer 15 facing away from the plastic substrate 11.

Alternatively, the topcoat layer 16 may be a second UV coating layer 16. The thickness of the topcoat layer 16 may be 20-25 microns.

In the present embodiment, the finishing paint layer 16 may be formed by: spraying a UV paint on the second bonding layer 15; leveling the UV coating for a period of time; the UV paint on the second bonding layer 15 is irradiated with ultraviolet light to be cured to form a second UV paint layer 16.

Optionally, the leveling time (e.g., the second length of time) when the second UV coating layer 16 is formed is greater than the leveling time (e.g., the first length of time) when the first UV coating layer 12 is formed. As previously mentioned, if the final shell finished product of first UV coating layer 12 is too smooth will appear rainbow lines, by controlling the leveling time of first UV coating layer 12 for a relatively short period of time, it is possible to avoid first UV coating layer 12 being too smooth, and then avoid the appearance of rainbow lines. 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 other embodiments, the second UV paint layer 16 may be formed on the second bonding layer 15 by evaporation.

The second UV coating layer 16 is prepared from the following coating materials in parts by weight: 60-70 parts of UV coating; 30-40 parts of a diluent; 3-10 parts of UV curing fluorine-containing acrylic compound. The diluent can be a mixture of butyl acetate, ethyl acetate and butanone. The finishing paint layer 16 formed by the paint with the proportion can prevent fingerprints on the finished shell product.

In the present embodiment, the first bonding layer 12, the second bonding layer 15 and the topcoat layer 16 are all made of light-permeable material.

The present embodiment can achieve the effect of transparent imitation ceramic and imitation glass by providing the housing including the plastic substrate 11, the first bonding layer 12, the optical film layer 13, the colored paint layer 14, the second bonding layer 15, and the topcoat layer 16, which are sequentially stacked. The metal oxide layers (the refraction film layer 132 and the hardness strengthening layer 133) and the magnesium fluoride layer 131 formed by sputtering and evaporation processes can be matched with the colors of different colored paint layers 14, so that the effects of abundant dark colors or light colors of imitation glass and ceramics are realized.

Particularly, in the present embodiment, when the color paint layer 14 is light, the refraction film layer 132 and the hardness enhancing layer 133 are matched to achieve the effect of light-colored imitation glass and ceramic.

Alternatively, in the present embodiment, the thickness of the first bonding layer 12 is greater than or equal to twice the thickness of the second bonding layer 15. The inventors of the present application have discovered that, by combining the above-described shell laminated structure when the thickness of the first joining layer 12 is equal to or greater than twice the thickness of the second joining layer 15, a shell having a strong transparency can be realized, and the transparency of the shell can be closer to that of ceramic.

Referring to fig. 2, fig. 2 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 housing of the electronic device of the first embodiment of the present application is that the optical film layer 23 of the housing of the present embodiment further includes a color permeable layer 234 stacked on the refractive film layer 232.

Optionally, a color permeable modulating layer 234 is disposed between the refractive film layer 232 and the magnesium difluoride layer 231.

It is understood that the stacking order between the color permeable layer 234 and the other layers of the optical film layer 23 may be other, for example, the color permeable layer 234 may be disposed between the refractive film layer 232 and the stiffening layer 242.

Alternatively, the color permeable color modulating layer 234 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 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 24 is used in combination to achieve a particularly clear and glossy ceramic effect.

The color collocation of refraction rete 232 and color paint layer 24 is passed through to this embodiment, and further the color collocation with the color mixing layer 234 of light-permeable again, can realize abundant colour, and the colour adjustability is strong, and the colour is more penetrating, has the colour and has the degree of depth and feels.

Referring to fig. 3, fig. 3 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 first bonding layer is formed on the plastic substrate by a spray coating process.

The forming of the first bonding layer 12 on the plastic substrate 11 by the spraying 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 first duration; the first UV coating layer 13 is formed by irradiation with ultraviolet light.

Step 103: an optical film layer including at least one metal oxide layer is formed on the first 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 a titanium oxide layer, an indium oxide layer, a tin oxide layer, an indium tin oxide layer, an aluminum oxide layer, and a single crystal zirconium dioxide layer in any of the above embodiments. The sputtering of the silicon dioxide is to form a silicon dioxide layer by introducing oxygen into the silicon as a target material and performing magnetron sputtering, and the forming of the magnesium difluoride layer is to form the magnesium difluoride layer by sputtering as the target material.

Step 104: and forming a colored paint layer on the optical film layer by a spraying process.

Wherein, the paint of the colored paint layer 14 can be prepared firstly, and the preparation proportion is as follows: 40-45% of polymethyl methacrylate, 35-40% of isooctyl methacrylate and 5-10% of nano color paste by weight percent, and then spraying the paint of the colored paint layer on the optical film layer to form the colored paint layer 14 by curing.

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

The formation of the second bonding layer 15 on the color paint layer 14 by the spraying process may specifically include the following steps: spraying PU coating on the colored paint layer 14; leveling the PU coating for a period of time; baking to dry the PU coating to form the PU coating layer 15.

Step 106: a topcoat layer is formed on the second bonding layer by a spray coating process.

Wherein, the coating of the finish paint layer is firstly prepared according to the weight proportion: 60-70 parts of UV coating; 30-40 parts of a diluent; 3-10 parts of UV curing fluorine-containing acrylic compound. The diluent can be a mixture of butyl acetate, ethyl acetate and butanone. The formation of the topcoat layer 16 on the second bonding layer 15 by the spray coating process may specifically include the steps of: coating the second bonding layer 15 with a topcoat layer; leveling the coating of the topcoat layer on the second bonding layer 15 for a second duration; the second UV paint layer 16 is formed by irradiation with ultraviolet light. Wherein the first duration is less than the second duration.

In the embodiment, the first bonding layer, the second bonding layer and the finish paint layer are formed through a spraying process, and 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. 4, fig. 4 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: a first bonding layer is formed on the plastic substrate by an evaporation process.

The forming process of the first bonding layer 12 may specifically be: evaporating the UV coating through evaporation equipment; cooling cures the UV material to form the first bonding layer 12 on the plastic substrate 11.

Step 203: and forming an optical film layer on the first 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: and forming a colored paint layer on the optical film layer by an evaporation process.

The colored paint layer material is evaporated by using evaporation equipment, and then is solidified on the optical film layer by cooling to form the colored paint layer 14.

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

The specific forming steps of the second bonding layer 15 may be: the PU coating is evaporated by an evaporation device and cooled to solidify the PU material on the pigmented paint layer 14 to form a second bonding layer 15.

Step 206: a topcoat layer is formed on the second bonding layer by a spray coating 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 shell provided with the electronic device comprises a plastic substrate, a first bonding layer arranged on the plastic substrate, an optical film layer arranged on the first bonding layer, a colored paint layer arranged on the optical film layer, a second bonding layer arranged on the colored paint layer and a finish paint layer arranged on the second bonding layer; wherein, first bonding layer, colored paint layer the second bonding layer and finish paint layer is the light-permeable material, the optics rete includes to be formed through sputtering or coating by vaporization technology at least one deck metal oxide layer on the first bonding layer, and the electron device's of this application casing can realize the imitative pottery and the glass effect of light colour, can realize dark imitative ceramic effect again, and the colour adjustability is strong, and the outward appearance is more penetrating.

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 in that the shell comprises a plastic substrate, a first bonding layer arranged on the plastic substrate, an optical film layer arranged on the first bonding layer, a colored paint layer arranged on the optical film layer, a second bonding layer arranged on the colored paint layer and a finish paint layer arranged on the second bonding layer;

the first bonding layer is a first UV coating layer, UV coating is sprayed on the plastic substrate, the UV coating on the plastic substrate is leveled, the leveling time is a first duration, and the first UV coating layer is formed by ultraviolet curing;

the color paint layer at least comprises 40-45 wt% of polymethyl methacrylate, 35-40 wt% of isooctyl methacrylate and 5-10 wt% of nano color paste, so as to avoid the color paint layer from corroding the optical film layer;

the surface paint layer is a second UV paint layer, UV paint is sprayed on the second bonding layer, the UV paint on the second bonding layer is leveled, the leveling time is a second duration, and the second UV paint layer is formed by ultraviolet curing; wherein the first duration is less than half of the second duration to avoid rainbow patterns;

the first bonding layer, the color paint layer, the second bonding layer and the finish paint layer are made of light-permeable materials, and the optical film layer comprises at least one metal oxide layer formed on the first bonding layer through sputtering or evaporation process.

2. The housing of claim 1, wherein the optical film layer comprises at least a refractive film layer for refracting light rays passing through the refractive film layer.

3. The housing of claim 2, wherein the refractive film layer comprises a first titanium oxide layer, a silicon oxide layer, and a second titanium oxide layer arranged in a stack.

4. The housing of claim 2, wherein the optical film layer further comprises a magnesium difluoride layer disposed in a stack with the refractive film layer, the magnesium difluoride layer being disposed between the refractive film layer and the first bonding layer.

5. The housing of claim 2 or 4 wherein the optical film layer further comprises a light permeable hardness enhancing layer disposed in a stack with the refractive film layer, the light permeable hardness enhancing layer being disposed between the refractive film layer and the second bonding layer.

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

7. The housing of claim 1, wherein the second bonding layer is a PU paint layer.

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

9. The housing of claim 1, wherein the thickness of the first bonding layer is greater than or equal to twice the thickness of the second bonding layer.

10. The housing of claim 1, wherein the layer of pigmented paint is formed on the layer of optical film by a spray or evaporation process.

11. A method of manufacturing a housing for an electronic device, the method being for manufacturing a housing according to any one of claims 1 to 10, the method comprising:

forming a first bonding layer on a plastic substrate;

forming an optical film layer on the first bonding layer;

forming a colored paint layer on the optical film layer;

forming a second bonding layer on the color paint layer;

forming a topcoat layer on the second bonding layer;

the first bonding layer, the colored paint layer, the second bonding layer and the finish paint layer are made of light-permeable materials, and the optical film layer comprises at least one metal oxide layer formed on the first bonding layer through a sputtering or evaporation process.

12. An electronic device, characterized in that the electronic device comprises a device body and a casing for protecting the device body, the casing being according to any one of claims 1-10.