CN108583130B

CN108583130B - Electronic device, shell thereof and manufacturing method of shell

Info

Publication number: CN108583130B
Application number: CN201810326527.1A
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: 2020-06-05
Anticipated expiration: 2038-04-12
Also published as: CN108583130A

Abstract

The application discloses a shell of an electronic device, which comprises a plastic base layer, a color paint layer arranged on the plastic base layer, a first combination layer arranged on the color paint layer, an optical film layer arranged on the first combination layer, a corrosion-resistant layer arranged on the optical film layer and a finish paint layer arranged on the corrosion-resistant layer, wherein the optical film layer comprises a second combination layer arranged on the first combination layer, a refraction film layer arranged on the second combination layer and a hardness strengthening layer arranged on the refraction film layer, the second combination layer, the refraction film layer and the hardness strengthening layer at least comprise a metal oxide layer formed by sputtering or evaporation process, the first combination layer, the second combination layer, the corrosion-resistant layer, the finish paint layer and the hardness strengthening layer are all light-permeable materials, through the mode, the shell can realize light-color ceramic-like and glass effects and can also realize dark-color ceramic-like effects, and the color adjustability is strong, the appearance is more transparent, and the reliability of the combination of the optical film layer and the colored paint layer is high.

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, color gradation and 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 utility model provides an electron device's casing, this casing includes the plastics basic unit, set up the color paint layer on the plastics basic unit, set up the first bonding layer on color paint layer, set up the optics rete on first bonding layer, set up the anti-corrosion layer on the optics rete and set up the finish paint layer on anti-corrosion layer, the optics rete is including setting up the second anchor coat on first bonding layer, set up the refraction rete on the second anchor coat and set up the hardness strengthening layer on the refraction rete, the second anchor coat, refraction rete and hardness strengthening layer include at least that the one deck passes through the metal oxide layer that sputtering or coating by vaporization technology formed, first bonding layer, the second anchor coat, the anti-corrosion layer, finish paint layer and hardness strengthening.

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 colored paint layer on the plastic base layer; forming a first bonding layer on the colored paint layer; forming an optical film layer on the first bonding layer; forming a resist layer on the optical film layer; forming a topcoat layer on the resist layer; wherein, optics rete is including setting up the second anchor coat on first anchor coat, setting up the refraction rete on the second anchor coat and setting up the hardness strengthening layer on the refraction rete, and second anchor coat, refraction rete and hardness strengthening layer include the metal oxide layer that the one deck formed through sputtering or coating by vaporization technology at least, and first anchor coat, second anchor coat, anti-corrosion layer, finish paint layer and hardness strengthening layer are light-permeable material.

Another technical scheme adopted by the embodiment of the application is as follows: an electronic device is provided, which comprises the casing.

The embodiment of the application comprises a shell, a color paint layer arranged on the plastic base layer, a first bonding layer arranged on the color paint layer, an optical film layer arranged on the first bonding layer, a corrosion-resistant layer arranged on the optical film layer and a finish paint layer arranged on the corrosion-resistant layer, wherein the optical film layer comprises a second bonding layer arranged on the first bonding layer, a refraction film layer arranged on the second bonding layer and a hardness strengthening layer arranged on the refraction film layer, the second bonding layer, the refraction film layer and the hardness strengthening layer at least comprise a metal oxide layer formed by sputtering or evaporation process, the first bonding layer, the second bonding layer, the corrosion-resistant layer, the finish paint layer and the hardness strengthening layer are all light-permeable materials, the shell of the electronic device can realize light-color ceramic-like and glass effects and also can realize ceramic-like effects, and has strong color adjustability, the appearance is more penetrating, and the bonding reliability of optics rete and colored paint layer is high.

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 colored paint layer, the first combination 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 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 ceramics, and when the structure of the plastic substrate, the colored paint layer, the first bonding layer, the optical film layer, the anti-corrosion layer and the finish paint layer which are sequentially stacked is adopted, the effect is particularly obvious, and the problem of color occlusion or infirm bonding cannot occur between the layers.

Particularly, the layer of the optical film layer closest to the first bonding layer is the second bonding layer made of metal oxide materials, the second bonding layer and the first bonding layer can be well bonded, the bonding reliability of the optical film layer and the colored paint layer is improved, and the second bonding layer is used as a part of the optical film layer and plays a positive role in achieving the transparency of the shell.

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 the present embodiment, the housing of the electronic device may include a plastic substrate 11, a colored paint layer 12, a first bonding layer 13, an optical film layer 14, a resist 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.

A layer of pigmented paint 12 is formed on the plastic substrate 11.

Alternatively, the colored paint layer 12 may be formed on the plastic substrate 11 by a spray coating process. The color paint layer 12 can be black, white, gray, red, blue, etc.

In other embodiments, the color paint layer 12 may be formed on the plastic substrate 11 by evaporation. Compared with the process of UV transfer printing ink, the forming process of the colored paint layer 12 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 layer of lacquer 12 may be a stoving-type lacquer, i.e. cured by baking after the lacquer has been sprayed on the plastic substrate 11.

Alternatively, the thickness of the pigmented paint layer 12 may be 8-12 microns, specifically 10 microns, and may also be 8 microns or 12 microns.

A first bonding layer 13 is formed on the surface of the pigmented paint layer 12 remote from the plastic substrate 11. The thickness of the first bonding layer 13 may be 20 to 25 micrometers. The optical film layer 14 cannot be directly formed on the pigmented paint layer 12, and the first bonding layer 13 functions as a substrate for the subsequent formation of the optical film layer 14, so that the optical film layer 14 and the pigmented paint layer 12 can be tightly bonded together through the first bonding layer 13.

Alternatively, the first bonding layer 13 may be a first UV coating layer 13, i.e., a first polyurethane UV curable coating layer. The first bonding layer 13 is made of a light-transmitting material.

In this embodiment, the first UV coating layer 13 may be formed in a manner of: and spraying UV coating on the colored paint layer 12, leveling the UV coating on the colored paint layer 12 for a period of time, and curing by using ultraviolet light to form a first UV coating layer 13. The surface of the first UV coating layer 13 formed in this way can produce a smooth mirror effect and has a certain hardness. An optical glue layer may be further coated on the surface of the first UV coating layer 13 to increase the roughness of the surface of the first UV coating layer 13, or N, N-dimethylformamide with a certain concentration may be doped in the first UV coating layer 13, so that the surface of the first UV coating layer 13 has micropores, so that the optical film layer 14 subsequently formed on the first UV coating layer 13 is bonded more tightly without rainbow stripes.

In other embodiments, the specific formation manner of the first UV coating layer 13 may also be: a first UV paint layer 13 is formed on the colored paint layer 12 by evaporation. The smoothness of the surface of the first UV coating layer 13 formed by evaporation is lower than that of the surface of the first UV coating layer 13 formed by spraying, so that the optical film layer 14 formed on the first UV coating layer 13 is bonded more tightly, and rainbow marks are not generated.

The optical film layer 14 is formed on a surface of the first bonding layer 13 facing away from the plastic substrate 11.

The optical film layer 14 includes at least one metal oxide layer, such as an oxide layer of niobium, a first titanium oxide layer, a silicon oxide layer, a second titanium oxide layer, an aluminum oxide layer, a single crystal zirconium dioxide layer, or the like, which is described later, formed on the bonding layer 13 by a sputtering or evaporation process.

In the present embodiment, the optical film layer 14 may include a second bonding layer 141, a refractive film layer 142, and a hardness reinforcing layer 143, which are sequentially stacked and disposed on a surface of the first bonding layer 13 facing away from the plastic substrate 11.

Optionally, the second bonding layer 141, the refraction film layer 142 and the hardness enhancing layer 143 include at least one metal oxide layer formed by evaporation or sputtering, and are all made of a light-permeable material.

The second bonding layer 141 serves to perform a better bonding function with the first bonding layer 13, and the second bonding layer 141 also contributes to a more transparent display effect as a metal oxide layer.

Alternatively, the second bonding layer 141 is an oxide layer of niobium, for example, the second bonding layer 141 is a niobium monoxide layer, a niobium dioxide layer, a niobium pentoxide layer; or the second bonding layer 141 is a mixture layer of at least two of niobium monoxide, niobium dioxide, and niobium pentoxide; alternatively, the second bonding layer 141 has a laminated structure in which at least one of a niobium monoxide layer, a niobium dioxide layer, and a niobium pentoxide layer is laminated.

In particular, when the oxide layer of niobium is used as the second bonding layer 141, the second bonding layer 141 provides a positive effect on the transparency of the case in cooperation with the refraction film layer 142 and the hardness increasing layer 143, and also provides an effect of tightly bonding the optical film layer 14 and the first bonding layer 13.

The refractive film layer 142 is used for refracting the light passing through the refractive film layer 142.

Alternatively, the refractive film layer 142 may include a first titanium oxide layer 142a, a silicon oxide layer 142b, and a second titanium oxide layer 142c, which are sequentially stacked and disposed on a surface of the second bonding layer 141 facing away from the plastic substrate 11.

It should be understood that the lamination order of the respective layers in the refractive film layer 142 is not limited to the above-described case, and different refractive effects may be achieved by adjusting the lamination order of the titanium oxide and the silicon oxide in the refractive film layer 142. For example, the refractive film layer 142 may further include a silicon oxide layer, a titanium oxide layer, and a silicon oxide layer sequentially stacked. In addition, different color effects can also be achieved by adjusting the film thickness of each of the refractive film layers 142.

Alternatively, the first titanium oxide layer 142a may be a titanium dioxide layer or a triple titanium oxide layer, the second titanium oxide layer 142c may be a titanium dioxide layer or a triple titanium oxide layer, and the silicon oxide layer 142b may be a silicon dioxide layer.

Alternatively, the hardness enhancing layer 143 may be a layer of alumina or a layer of single crystal zirconia.

The hardness strengthening layer 143 serving as the outermost layer of the optical film layer 14 can protect the optical film layer 14, so that the manufactured shell finished product has higher hardness, strong bending resistance and less possibility of generating scratches on the surface. In addition, the hardness enhancing layer 143, together with the refraction film layer 142 and the second bonding layer 141, also has a positive effect on the permeability of the case.

In this embodiment, the second bonding layer 141, the first titanium oxide layer 142a, the silicon oxide layer 142b, the second titanium oxide layer 142c, and the hardness enhancing layer 143 of the optical film layer 14 are all formed by a sputtering or evaporation process.

The resist layer 15 is formed on the surface of the optical film layer 14 facing away from the plastic substrate 11. The function of the corrosion-resistant layer 15 is to prevent the subsequently formed finish paint layer 16 from corroding the optical film layer 14, so as to avoid the occurrence of color biting and causing mixed marks on the finished shell product, and on the other hand, the corrosion-resistant layer 15 can generate strong adhesive force, so that the subsequently formed finish paint layer 16 is firmly combined with the optical film layer 14 through the corrosion-resistant layer 15.

Alternatively, the resist layer 15 may be a PU paint layer 15, i.e., a polyurethane paint layer. The resist layer 15 may have a thickness of 5-10 microns. For example, the thickness of the resist layer 15 may be 8 microns, or may be 5 microns or 10 microns.

In this embodiment, the PU coating layer 15 may be formed in the following manner: spraying PU coating on the optical film layer 14; leveling the PU 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 optical film layer 14 by evaporation.

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

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

Optionally, the top paint layer 16 is doped with titanium dioxide particles, the average particle size of the titanium dioxide particles is smaller than 100 nm, the titanium dioxide particles can further increase the transparency of the shell and increase the surface hardness of the shell, in addition, the titanium dioxide particles can enable the top paint layer 16 to play an antibacterial role, and the titanium dioxide particles can decompose stains and bacteria on the surface of the top paint layer 16 under the action of ultraviolet irradiation, so that the body health of a user is facilitated.

Optionally, the material of the finish paint layer 16 includes 5-50% by mass of the UV paint, 1-5% by mass of the titanium dioxide particles, and 10-75% by mass of the silicone resin. The organosilicon resin is matched with the titanium dioxide particles to increase the hardness of the finish paint layer 16 and reduce the surface tension of the finish paint layer 16, so that fingerprints are not easy to remain on the prepared shell finished product.

In the present embodiment, the finishing paint layer 16 may be formed by: spraying UV paint doped with titanium dioxide particles and organic silicon resin on the anti-corrosion layer 15; leveling the UV coating for a period of time; the UV paint on the resist 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 time period) when the second UV coating layer 16 is formed is greater than the leveling time (e.g., the first time period) when the first UV coating layer 13 is formed. As mentioned before, if the first UV coating layer 13 is too smooth and the final shell finished product will have rainbow lines, the first UV coating layer 13 can be prevented from being too smooth by controlling the leveling time of the first UV coating layer 13 to be relatively short, and then the occurrence of rainbow lines can be prevented. 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, the bonding layer 13, the resist layer 15, and the topcoat layer 16 are all made of a light-permeable material.

The transparent ceramic-like and glass-like effects can be achieved by arranging the shell comprising the plastic substrate 11, the colored paint layer 12, the first bonding layer 13, the optical film layer 14, the anti-corrosion layer 15 and the finish paint layer 16 which are sequentially laminated. The metal oxide optical film layers (the second combination layer 141, the refraction film layer 142 and the hardness strengthening layer 142) formed by adopting sputtering and evaporation processes can be matched with the colors of different color paint layers 12, so that the effects of abundant dark or light-colored glass and ceramic imitation can be realized.

Particularly, in the embodiment, when the color paint layer 12 is light, the second bonding layer 141, the refraction film layer 142 and the hardness strengthening layer 143 are matched to realize the light-colored glass-like and ceramic-like effects.

Alternatively, in the present embodiment, the thickness of the first bonding layer 13 is greater than or equal to twice the thickness of the resist layer 15. The inventors of the present application have discovered that, by combining the above-described housing laminated structure, a housing having a very strong transparency can be realized and the transparency of the ceramic can be more closely approximated when the thickness of the first bonding layer 13 is equal to or greater than twice the thickness of the resist layer 15.

The second bonding layer 141 not only has a positive effect on the transparency of the housing as one of the layers of the optical film layer 14, but also has a good bonding force with the first bonding layer 13, and particularly, the inventors of the present application can generate a very strong effect on the transparency by using the niobium oxide as the material of the second bonding layer 141 in combination with the light color, and the niobium oxide and the first UV coating layer 13 (bonding layer 13) have a good bonding effect and do not have rainbow marks.

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 24 of the housing of the present embodiment further includes a color permeable layer 244 stacked on the refractive film layer 242.

Optionally, a color permeable layer 244 is disposed between the refractive film layer 242 and the second bonding layer 241.

It is understood that the stacking order between the color permeable layer 244 and the other layers of the optical film layer 24 may be other, for example, the color permeable layer 244 may be disposed between the refractive film layer 242 and the hardness enhancing layer 243.

Alternatively, the color permeable color modulating layer 244 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 22 is used, a particularly clear and glossy ceramic effect can be achieved.

The color collocation of refraction rete 241 and color paint layer 22 is passed through to this embodiment, and further the color collocation with the color mixing layer 243 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.

In the present embodiment, the second bonding layer 241, the color-light-permeable layer 244, the first titanium oxide layer 242a, the silicon oxide layer 242b, the second titanium oxide layer 242c, and the hardness enhancing layer 243 of the optical film layer 24 are all formed by a sputtering or evaporation process.

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: and forming a colored paint layer on the plastic base layer through a spraying process.

The step of forming the colored paint layer 12 on the plastic base layer 11 by the spraying process may specifically include the following steps: firstly, spraying colored paint on the plastic base layer 11; the color paint is then baked and cured to form the color paint layer 12.

Step 103: the first bonding layer is formed on the colored paint layer by a spraying process.

The step of forming the first bonding layer 13 on the colored paint layer 12 by the spraying process may specifically include the following steps: spraying UV paint on the colored paint layer 12; leveling the UV coating on the colored paint layer 12, wherein the leveling time is a first duration; the first UV coating layer 13 is formed by irradiation with ultraviolet light.

Step 104: an optical film layer including at least one metal oxide layer is formed on the bonding layer by a sputtering process.

The specific stacked structure of the

optical film layer

14 or 24 can be as described above, and is not described here 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, a silicon oxide layer, an indium oxide layer, a tin oxide layer, an indium tin oxide layer, an aluminum oxide layer, a single crystal zirconium dioxide layer, niobium monoxide, niobium dioxide, niobium pentoxide, or the like in any of the above embodiments.

Step 105: a resist layer is formed on the optical film layer by a spray coating process.

The formation of the resist layer 15 on the optical film layer 14 by the spray coating process may specifically include the following steps: spraying PU coating on the optical film 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 resist layer by a spray coating process.

The formation of the topcoat layer 16 on the resist layer 15 by the spray coating process may specifically include the following steps: preparing a doped UV coating according to 5-50% of UV coating, 1-5% of titanium dioxide particles and 10-75% of organic silicon resin by mass percentage; spraying the UV paint on the resist layer 15; leveling the UV coating on the resist 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 bonding layer, the anti-corrosion layer and the finish paint layer are formed through a spraying process, the surfaces of all the layers are relatively smooth, the prepared shell finished product is stronger in glossiness, the process consistency is strong, the number of required devices is small, and the process is simple. 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: and forming a colored paint layer on the plastic base layer through an evaporation process.

The evaporation process can be an electron gun evaporation process or other vacuum evaporation processes. The process of forming the color paint layer 12 may specifically be: evaporating the evaporation type colored paint through an evaporation device, and cooling to solidify the colored paint on the plastic base layer 11 to form a colored paint layer 12.

Step 203: and forming a first bonding layer on the colored paint layer through an evaporation process.

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

Step 204: 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. For example, a metal simple substance is used as a target material, oxygen is introduced, and the electrode generates a metal oxide corresponding to the metal simple substance in a certain oxygen environment.

Step 205: a resist layer is formed on the optical film layer by an evaporation process.

The specific formation steps of the resist layer 15 may be: the PU coating is evaporated by an evaporation apparatus, and the PU material is cured on the optical film layer 14 by cooling to form a resist layer.

Step 206: a topcoat layer is formed on the resist 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 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. The utility model provides a casing of electronic device, its characterized in that, the casing includes the plastics basic unit, set up in colour paint layer on the plastics basic unit, set up in first bonding layer on the colour paint layer, set up in optics rete on the first bonding layer, set up in optics rete goes up the anti-corrosion layer and sets up in the finish paint layer on the anti-corrosion layer, optics rete including set up in second bonding layer on the first bonding layer, set up in refraction rete on the second bonding layer and set up in hardness strengthening layer on the refraction rete, the second bonding layer refraction rete and hardness strengthening layer include at least that the one deck passes through the metal oxide layer that sputtering or coating by vaporization technology formed, first bonding layer the second bonding layer the anti-corrosion layer finish paint layer and hardness strengthening layer are light-permeable material, the first bonding layer is a first UV coating layer, the finish coating layer is a second UV coating layer, and the leveling time when the first UV coating layer is formed is less than half of the leveling time when the second UV coating layer is formed.

2. The housing of claim 1, wherein the second bonding layer is an oxide layer of niobium.

3. The housing of claim 1 or 2, wherein the resist layer is a PU paint layer.

4. The housing according to claim 1 or 2, wherein the hardness strengthening layer is an aluminum oxide layer or a single crystal zirconium dioxide layer.

5. The housing according to claim 1 or 2, 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.

6. The housing according to claim 1 or 2, wherein the bonding layer has a thickness greater than or equal to twice the thickness of the resist layer.

7. The housing according to claim 1 or 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.

8. The housing of claim 1, wherein the topcoat layer is doped with titanium dioxide particles having an average particle size of less than 100 nanometers.

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

forming a colored paint layer on the plastic base layer;

forming a first bonding layer on the colored paint layer;

forming an optical film layer on the first bonding layer;

forming a resist layer on the optical film layer;

forming a topcoat layer on the resist layer;

wherein, optics rete including set up in second anchor coat on the first anchor coat, set up in refraction rete on the second anchor coat and set up in hardness strengthening layer on the refraction rete, the second anchor coat refraction rete and hardness strengthening layer includes the metal oxide layer that the one deck formed through sputtering or coating by vaporization technology at least, first anchor coat the second anchor coat the anti-corrosion layer finish paint layer and hardness strengthening layer is the light-permeable material.

10. An electronic device characterized in that the electronic device comprises a device main body and the casing according to any one of claims 1 to 8.