阅读说明：本技术 陶瓷装饰膜及其制备方法、壳体组件和电子设备 (Ceramic decorative film, preparation method thereof, shell assembly and electronic equipment ) 是由 廖奕翔 于 2021-07-29 设计创作，主要内容包括：本申请提供了一种陶瓷装饰膜,所述陶瓷装饰膜包括氧化铝层和着色剂,所述氧化铝层具有相对设置的第一表面和第二表面并开设有多个通孔,所述通孔贯穿所述第一表面和所述第二表面,所述着色剂填充在所述通孔中,其中所述陶瓷装饰膜的光学透过率大于或等于20％。该陶瓷装饰膜具有着色剂,能够赋予陶瓷装饰膜丰富的颜色外观,同时陶瓷装饰膜具有透光性,能够更好地与其他膜层配合使用,并且陶瓷装饰膜为陶瓷材质,不会阻挡电磁波的传输,有利于陶瓷装饰膜的应用。本申请还提供了陶瓷装饰膜的制备方法、壳体组件和电子设备。(The application provides a ceramic decorative film, ceramic decorative film includes aluminium oxide layer and colorant, aluminium oxide layer has relative first surface and the second surface that sets up and has seted up a plurality of through-holes, the through-hole runs through first surface with the second surface, the colorant is filled in the through-hole, wherein ceramic decorative film's optical transmittance is greater than or equal to 20%. This pottery decoration membrane has the colorant, can give the abundant colour outward appearance of pottery decoration membrane, and pottery decoration membrane has the light transmissivity simultaneously, can use with other retes cooperations better to pottery decoration membrane is ceramic material, can not block electromagnetic wave's transmission, is favorable to the application of pottery decoration membrane. The application also provides a preparation method of the ceramic decorative film, a shell assembly and electronic equipment.)

1. The ceramic decorative film is characterized by comprising an aluminum oxide layer and a coloring agent, wherein the aluminum oxide layer is provided with a first surface and a second surface which are oppositely arranged and provided with a plurality of through holes, the through holes penetrate through the first surface and the second surface, the coloring agent is filled in the through holes, and the optical transmittance of the ceramic decorative film is greater than or equal to 20%.

2. The ceramic decorative film according to claim 1, wherein the pore diameter of the through-hole is 10nm to 40nm, and the pore volume of the alumina layer is 1ml/g to 5 ml/g.

3. The ceramic decorative film according to claim 1, further comprising a sealant which fills and closes an opening of an end of the through-hole.

4. The ceramic decorative film according to claim 3, wherein the filling thickness of the colorant is 3 μm to 8 μm, and the filling thickness of the sealant is 2 μm to 3 μm.

5. The ceramic decorative film according to claim 1, wherein the aluminum oxide layer has a thickness of 20 μm to 50 μm and an optical transmittance of 60% or more.

6. A method for preparing a ceramic decorative film is characterized by comprising the following steps:

carrying out anodic oxidation treatment on an aluminum substrate to form an oxidation layer, wherein the oxidation layer comprises an aluminum oxide layer, the aluminum oxide layer is provided with a first surface and a second surface which are oppositely arranged, and a plurality of through holes are formed in the aluminum oxide layer, and the through holes penetrate through the first surface and the second surface;

and separating the aluminum oxide layer, and coloring the aluminum oxide layer to fill a colorant into the through hole to obtain the ceramic decorative film, wherein the optical transmittance of the ceramic decorative film is greater than or equal to 20%.

7. The method of claim 6, wherein the oxide layer comprises the aluminum oxide layer and a non-porous barrier layer, and wherein the aluminum substrate and the non-porous barrier layer are separated from the aluminum oxide layer by at least one of heating and chemical etching.

8. The method of claim 6, further comprising: and carrying out hole sealing treatment after the coloring treatment, so that the hole sealing agent is filled and the opening at the end part of the through hole is sealed.

9. A housing assembly comprising a housing and the ceramic decorative film of any one of claims 1 to 5 disposed on a surface of the housing.

10. The housing assembly of claim 9, further comprising at least one of an optical film layer, a non-conductive metal layer, and a textured layer.

11. The housing assembly of claim 10, wherein the optical film layers include at least one high index optical film and at least one low index optical film, the high index optical film and the low index optical film being alternately stacked; the refractive index of the high-refractive-index optical film is 2-3, and the refractive index of the low-refractive-index optical film is 1.1-1.7; the material of the high-refractive-index optical film comprises at least one of titanium dioxide, tantalum pentoxide, niobium pentoxide, zinc sulfide and zirconium dioxide, and the material of the low-refractive-index optical film comprises at least one of silicon monoxide, silicon dioxide and magnesium fluoride.

12. The housing assembly of claim 9, further comprising an explosion proof membrane disposed on a surface of the housing.

13. An electronic device, characterized in that the electronic device comprises a housing assembly according to any of claims 9-12.

Technical Field

The application belongs to the technical field of electronic products, and particularly relates to a ceramic decorative film, a preparation method thereof, a shell assembly and electronic equipment.

Background

With the continuous development of electronic devices, the requirements of users on the appearance effect of the shell are higher and higher, and the monotonous appearance cannot meet the requirements of users. Therefore, the appearance of more and more cases is becoming diversified.

Disclosure of Invention

In view of the above, the present application provides a ceramic decoration film, a method of manufacturing the same, a housing assembly, and an electronic device.

In a first aspect, the present application provides a ceramic decoration film, which includes an aluminum oxide layer and a colorant, wherein the aluminum oxide layer has a first surface and a second surface opposite to each other and is provided with a plurality of through holes, the through holes penetrate through the first surface and the second surface, and the colorant is filled in the through holes, wherein the optical transmittance of the ceramic decoration film is greater than or equal to 20%.

In a second aspect, the present application provides a method for preparing a ceramic decorative film, comprising:

carrying out anodic oxidation treatment on an aluminum substrate to form an oxidation layer, wherein the oxidation layer comprises an aluminum oxide layer, the aluminum oxide layer is provided with a first surface and a second surface which are oppositely arranged, and a plurality of through holes are formed in the aluminum oxide layer, and the through holes penetrate through the first surface and the second surface;

and separating the aluminum oxide layer, and coloring the aluminum oxide layer to fill a colorant into the through hole to obtain the ceramic decorative film, wherein the optical transmittance of the ceramic decorative film is greater than or equal to 20%.

In a third aspect, the present application provides a housing assembly comprising a housing and the ceramic decorative film of the first aspect, the ceramic decorative film being disposed on a surface of the housing.

In a fourth aspect, the present application provides an electronic device comprising the housing assembly of the third aspect.

The application provides a ceramic decorative film and a preparation method thereof, the ceramic decorative film has a colorant, can endow the ceramic decorative film with rich color appearance, has light transmittance, can be better matched with other film layers for use, is made of ceramic materials, cannot block transmission of electromagnetic waves, and is beneficial to application of the ceramic decorative film; the preparation method of the ceramic decorative film is simple, is convenient to operate, and can realize large-scale production; the shell assembly with the ceramic decorative film and the electronic equipment have rich and various appearance effects and strong product competitiveness.

Drawings

In order to more clearly explain the technical solution in the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be described below.

Fig. 1 is a schematic structural diagram of a ceramic decoration film according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of an aluminum oxide layer according to an embodiment of the present disclosure.

Fig. 3 is a photograph of an aluminum oxide layer provided in an embodiment of the present application.

FIG. 4 is an electron micrograph of the alumina layer of FIG. 3.

Fig. 5 is an enlarged schematic view of a dotted area in fig. 1 according to an embodiment of the present disclosure.

Fig. 6 is an enlarged schematic view of a dotted area in fig. 1 according to another embodiment of the present disclosure.

FIG. 7 is a schematic structural view of a ceramic decoration film according to another embodiment of the present application.

Fig. 8 is an enlarged schematic view of a dotted area in fig. 7 according to an embodiment of the present disclosure.

Fig. 9 is a flowchart of a method for manufacturing a ceramic decorative film according to an embodiment of the present disclosure.

Fig. 10 is a schematic view of an anodization process provided in an embodiment of the present application.

FIG. 11 is a photograph of a ceramic decorative film according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of a housing assembly according to an embodiment of the present application.

Fig. 13 is a schematic structural diagram of a housing assembly according to another embodiment of the present disclosure.

Fig. 14 is a schematic structural diagram of a housing assembly according to yet another embodiment of the present application.

Fig. 15 is a schematic structural diagram of a housing assembly according to yet another embodiment of the present application.

Fig. 16 is a schematic structural diagram of a housing assembly according to yet another embodiment of the present application.

Fig. 17 is a schematic structural diagram of a housing assembly according to yet another embodiment of the present application.

Fig. 18 is a schematic structural diagram of a housing assembly according to yet another embodiment of the present application.

Fig. 19 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 20 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The following is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications are also considered as the protection scope of the present application.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, which is a schematic structural view of a ceramic decoration film according to an embodiment of the present disclosure, a ceramic decoration film 10 includes an aluminum oxide layer 11 and a colorant 12, the aluminum oxide layer 11 has a first surface 111 and a second surface 112 opposite to each other and is provided with a plurality of through holes 110, the through holes 110 penetrate through the first surface 111 and the second surface 112, and the colorant 12 is filled in the through holes 110, wherein an optical transmittance of the ceramic decoration film 10 is greater than or equal to 20%.

In the application, the ceramic decorative film 10 is provided with the colorant 12, and the colorants 12 with different colors can be selected according to needs, so that the ceramic decorative film 10 is endowed with rich color appearance, and the visual effect of the ceramic decorative film 10 is improved; the ceramic decorative film 10 is made of ceramic materials, does not generate electromagnetic shielding and can meet application requirements; the ceramic decorative film 10 has certain light transmittance, can be used in cooperation with other films, and has a wider application range. In the related art, the metal film has metallic luster, but it can block transmission of electromagnetic waves, limiting its use in the electronic device 200; the plastic film does not influence the transmission of electromagnetic waves, can have changeable color appearance, but has strong plastic sense and poor glossiness. The ceramic decorative film 10 provided by the application has rich color appearance, can also present high-gloss texture, does not influence the transmission of electromagnetic waves, and is beneficial to the application of the ceramic decorative film in the electronic equipment 200.

Referring to fig. 2, a schematic structural diagram of an aluminum oxide layer according to an embodiment of the present disclosure is shown, in which the aluminum oxide layer 11 has a first surface 111 and a second surface 112 disposed opposite to each other, and a plurality of through holes 110 are formed in the aluminum oxide layer 11, and the through holes 110 penetrate through the first surface 111 and the second surface 112. The alumina layer 11 is a porous layer, and a plurality of through holes 110 are distributed on the alumina layer 11; by disposing the colorant 12 in the through-hole 110, the colored appearance of the ceramic decoration film 10 is realized, and the disposition of the alumina layer 11 can give the ceramic decoration film 10 a high-gloss appearance without affecting the transmission of electromagnetic waves.

In the present embodiment, the aperture of the through-hole 110 is 10nm to 40 nm. In this application, the aperture of through-hole 110 is the nanometer to make the setting of through-hole 110 not too much influence the intensity of aluminium oxide layer 11, the setting of through-hole 110 still is favorable to promoting aluminium oxide layer 11's bending property simultaneously, promotes its flexibility. In one embodiment of the present application, the aperture of the through hole 110 is 10nm to 35 nm. In another embodiment of the present application, the aperture of the via hole 110 is 20nm to 30 nm. In yet another embodiment of the present application, the aperture of the via hole 110 is 10nm to 20 nm. Specifically, the pore diameter of the via hole 110 may be, but not limited to, 10nm, 12nm, 15nm, 18nm, 23nm, 28nm, 31nm, 37nm, 39nm, or the like. In the embodiment of the present application, the aperture of the through hole 110 on the alumina layer 11 is not very different, which is beneficial to improving the uniformity of the appearance color of the ceramic decoration film 10. In the present embodiment, the plurality of through holes 110 are uniformly dispersed on the alumina layer 11. In the present application, the cross-sectional area of the opening of the through-hole 110 may be, but is not limited to, a circle, an ellipse, a hexagon, etc.

In the present embodiment, the through-hole 1 in the alumina layer 1110 has a distribution density of 50 particles/. mu.m²880 pieces/. mu.m². In the application, the alumina is distributed with a plurality of through holes 110, and the distribution density of the through holes 110 is large, so that the arrangement of the colorant 12 is facilitated, and the color uniformity of the ceramic decorative film 10 is ensured. In one embodiment of the present application, the distribution density of the through holes 110 in the alumina layer 11 is 100/μm²800 pieces/. mu.m². In another embodiment of the present application, the distribution density of the through holes 110 in the alumina layer 11 is 200/μm²750 pieces/. mu.m². In yet another embodiment of the present application, the distribution density of the through holes 110 in the alumina layer 11 is 300/μm²600 pieces/. mu.m². Specifically, the distribution density of the through holes 110 in the alumina layer 11 may be, but is not limited to, 150/μm²280 pieces/mum²350 pieces/. mu.m²400 pieces/. mu.m²460 pieces/. mu.m²500 pieces/. mu.m²630 pieces/. mu.m²770 pieces/. mu.m²Or 810/mum²And the like.

In the present embodiment, the pore volume of the alumina layer 11 is 1ml/g to 5 ml/g. That is, the volume of the through-hole 110 per gram of the alumina layer 11 is 1ml to 5 ml. The pore volume can not only ensure the color appearance of the ceramic decorative film 10, but also ensure the mechanical property of the alumina layer 11. In one embodiment of the present application, the alumina layer 11 has a pore volume of 1ml/g to 2 ml/g. In another embodiment of the present application, the alumina layer 11 has a pore volume of 2ml/g to 5 ml/g. In yet another embodiment of the present application, the alumina layer 11 has a pore volume of 2.5ml/g to 4 ml/g. Specifically, the pore volume of the alumina layer 11 may be, but not limited to, 1ml/g, 1.5ml/g, 1.8ml/g, 2ml/g, 2.1ml/g, 2.5ml/g, 3ml/g, 4ml/g, 4.5ml/g, or 5ml/g, etc.

In the present embodiment, the alumina layer 11 has light transmittance, so that the light transmittance of the ceramic decorative film 10 can be ensured. In an embodiment of the present application, the optical transmittance of the aluminum oxide layer 11 is greater than or equal to 60%, which is beneficial for the setting of the colorant 12 and ensures the visual effect of the ceramic decoration film 10. It is understood that the optical transmittance is the transmittance of light in the wavelength band of 380nm to 780 nm. Further, the optical transmittance of the aluminum oxide layer 11 is 60% to 80%. Specifically, the optical transmittance of the aluminum oxide layer 11 may be, but not limited to, 60%, 62%, 65%, 68%, 70%, 71%, 75%, 76%, 79%, 80%, or the like.

In the present application, the thickness of the alumina layer 11 may be set as necessary. In one embodiment of the present application, the alumina layer 11 has a thickness of 20 μm to 50 μm. The aluminum oxide layer 11 having the above thickness has a certain strength and good toughness, can be bent without cracking, and can be preferably applied to the cases 20 and the electronic devices 200 having various shapes. In one embodiment of the present application, the thickness of the aluminum oxide layer 11 is 25 μm to 40 μm. In another embodiment of the present application, the thickness of the aluminum oxide layer 11 is 20 μm to 30 μm. In yet another embodiment of the present application, the thickness of the aluminum oxide layer 11 is 35 μm to 50 μm. Specifically, the thickness of the alumina layer 11 may be, but not limited to, 20 μm, 23 μm, 26 μm, 30 μm, 33 μm, 37 μm, 40 μm, 45 μm, or 50 μm, etc.

Referring to fig. 3, a photograph of an aluminum oxide layer according to an embodiment of the present invention is shown, and fig. 4 is a schematic view of the aluminum oxide layer shown in fig. 3, wherein the aluminum oxide layer 11 has a thickness of 30 μm, the through holes 110 are uniformly distributed on the aluminum oxide layer 11, and the pore volume of the aluminum oxide layer 11 is 2 ml/g. In the present embodiment, the alumina layer 11 has light transmittance and excellent bending resistance, and is advantageous for application to the case assembly 100 and the electronic device 200.

In the present application, the colorant 12 is filled in the through-holes 110, thereby giving the ceramic decoration film 10 a color. Referring to fig. 5, an enlarged schematic view of a dotted area in fig. 1 is provided according to an embodiment of the present application, wherein the colorant 12 is filled in the through hole 110 and is flush with the second surface 112 of the aluminum oxide layer 11. In another embodiment, the colorant 12 fills the through hole 110 and is flush with the first surface 111 of the alumina layer 11. In yet another embodiment, the colorant 12 is filled into the through hole 110 and is flush with the first surface 111 and the second surface 112 of the alumina layer 11. It will be appreciated that the colorant 12 fills the through-holes 110 and is flush with at least one surface of the alumina layer 11, making the surface of the ceramic decoration film 10 more even while also facilitating the use of the ceramic decoration film 10. In another embodiment, referring to fig. 1, the colorant 12 is filled into the through hole 110 and is flush with the first surface 111 and the second surface 112 of the aluminum oxide layer 11, and the colorant 12 does not fill the through hole 110. That is, the colorant 12 is filled at the openings at both ends of the through-hole 110, and the colorant 12 is not filled in the middle of the through-hole 110, thereby being advantageous to ensure a high optical transmittance of the ceramic decorative film 10. In yet another embodiment, the colorant 12 fills the through-holes 110, facilitating long-term color development of the ceramic decorating film 10. Referring to fig. 6, an enlarged schematic view of a dotted area in fig. 1 is provided according to another embodiment of the present application, in which the colorant 12 is filled in the through hole 110 and is not flush with the first surface 111 or the second surface 112 of the aluminum oxide layer 11.

In the present application, the color of the colorant 12 may be selected as desired, such as red, yellow, blue, green, violet, orange, green, black, and the like. In one embodiment, the colorant 12 includes at least one of an inorganic colorant and an organic colorant. It will be appreciated that the colorant 12 is selected according to the desired color of the ceramic decorative film 10. In another embodiment, the colorant 12 comprises at least one of a non-color changing colorant, a temperature changing powder, a light changing powder, and a luminescent powder. The non-color-changing colorant has certain color appearance, and the color of the non-color-changing colorant is not changed under the condition of changing temperature and light; the temperature-change powder refers to that the color of the temperature-change powder changes in the temperature change process; the optically variable powder refers to that the color of the optically variable powder changes on the basis of sunlight or ultraviolet rays; the luminous powder stores the illumination in the daytime and generates fluorescence when the illumination is stopped so as to change the color; wherein, the change of color can be from colorless to colored, from colored to colorless, from a first color to a second color, etc. Specifically, the colorant 12 may be, but is not limited to, a commercially available material for coloring anodized aluminum. In the embodiment of the present application, when the colorant has a color, not a colorless color, the ceramic decorative film 10 can be made to exhibit a metallic texture.

In the present embodiment, the filling thickness of the colorant 12 is 3 μm to 8 μm. The colorant 12 with the micron-sized thickness is arranged, so that the appearance color effect of the ceramic decorative film 10 can be ensured, and meanwhile, the transmittance of the ceramic decorative film 10 is also ensured. In one embodiment of the present application, the filling thickness of the colorant 12 is 3 μm to 4 μm. In another embodiment of the present application, the filling thickness of the colorant 12 is 4 μm to 8 μm. Specifically, the filling thickness of the colorant 12 may be, but not limited to, 3 μm, 3.7 μm, 4 μm, 4.5 μm, 5 μm, 5.3 μm, 6 μm, 7 μm, 8 μm, or the like.

Referring to fig. 7, a schematic structural diagram of a ceramic decoration film according to another embodiment of the present application, and fig. 8 are enlarged schematic diagrams of a dotted line region in fig. 7 according to an embodiment of the present application, in which the ceramic decoration film 10 further includes a sealant 13, and the sealant 13 fills and seals an opening at an end of the through hole 110. The hole sealing agent 13 can protect the coloring agent 12, ensure the long-term stable color appearance of the ceramic decorative film 10, and prolong the service life of the ceramic decorative film 10. It is understood that the sealant 13 is farther from the inside of the through-hole 110 than the colorant 12. In one embodiment, as shown in fig. 8, the colorant 12 and the sealant 13 are completely separated without mixed portions. In another embodiment, there are mixed portions between the colorant 12 and the sealant 13, i.e., there are both a region filled with the colorant 12 alone and a region filled with the sealant 13 alone in the through-hole 110, and there is also a region filled with the colorant 12 and the sealant 13 mixed between the two regions. In the present embodiment, the sealant 13 is filled in the through hole 110 and is flush with the first surface 111 and/or the second surface 112 of the alumina layer 11, so that the surface of the ceramic decoration film 10 is more flat. In the present application, any commercially available type of sealing agent may be selected as the sealing agent 13. In the present embodiment, the sealant 13 has light transmittance, thereby ensuring the optical transmittance of the ceramic decorative film 10. In one embodiment, the sealant 13 is colorless and transparent.

In an embodiment of the present application, the filling thickness of the sealing agent 13 is not greater than that of the colorant 12. The hole sealing agent 13 can protect the colorant 12, and is beneficial to increase the filling thickness of the colorant 12 in the ceramic decoration film 10, so as to meet the color requirement of the ceramic decoration film 10. In another embodiment of the present application, the filling thickness of the sealant 13 is 2 μm to 3 μm. Specifically, the filling thickness of the sealing agent 13 may be, but not limited to, 2 μm, 2.1 μm, 2.5 μm, 2.7 μm, 2.8 μm, 2.9 μm, 3 μm, or the like. In the embodiment of the present application, the sum of the filling thicknesses of the colorant 12 and the sealant 13 is less than half of the depth of the through-hole 110, thereby contributing to the improvement of the light transmittance of the ceramic via 10.

In the present application, the ceramic decorative film 10 has an optical transmittance of 20% or more, thereby facilitating its use in combination with other film layers. In the present embodiment, the ceramic decorative film 10 has an optical transmittance of 20% to 50%. Further, the optical transmittance of the ceramic decorative film 10 is 20% to 30%. The ceramic decorative film 10 can be matched with other film layers for use, and meanwhile has high gloss texture, and the appearance effect of the ceramic decorative film 10 is improved. Specifically, the optical transmittance of the ceramic decorative film 10 may be, but not limited to, 20%, 22%, 24%, 25%, 26%, 27%, 28%, 29%, or the like.

In the present embodiment, the ceramic decorative film 10 has a bending resistance. In one embodiment, the ceramic decorative film 10 is attached to the surface of a cylinder with a radius greater than or equal to 5mm, and the ceramic decorative film 10 does not crack. Therefore, the ceramic decorative film 10 provided by the present application has excellent bending resistance, and can be used for products with various shapes such as a plane, a curved surface and the like.

Referring to fig. 9, a flow chart of a method for manufacturing a ceramic decorative film according to an embodiment of the present application is shown, where the method for manufacturing a ceramic decorative film 10 according to any of the embodiments includes:

s101: carrying out anodic oxidation treatment on an aluminum substrate to form an oxide layer, wherein the oxide layer comprises an aluminum oxide layer, the aluminum oxide layer is provided with a first surface and a second surface which are oppositely arranged and is provided with a plurality of through holes, and the through holes penetrate through the first surface and the second surface.

S102: and separating the aluminum oxide layer, and coloring the aluminum oxide layer to fill the through hole with a colorant to obtain the ceramic decorative film, wherein the optical transmittance of the ceramic decorative film is greater than or equal to 20%.

The preparation method of the ceramic decorative film 10 provided by the application is simple to operate and easy for large-scale production, and the ceramic decorative film 10 with excellent performance and good appearance effect is prepared by anodic oxidation, separation and coloring, so that the ceramic decorative film 10 is beneficial to application in the shell assembly 100 and the electronic device 200.

In S101, an oxide layer including an aluminum oxide layer having a porous structure is formed by subjecting an aluminum substrate to an anodic oxidation process. In the present application, the aluminum substrate may be, but is not limited to, pure aluminum or an aluminum alloy, and the aluminum alloy may be, but is not limited to, an aluminum-silicon alloy, an aluminum-magnesium alloy, an aluminum-zinc alloy, or an aluminum-manganese alloy.

In the present application, the thickness of the aluminum substrate may be determined according to the thickness of the desired aluminum oxide layer 11. In one embodiment, the thickness of the aluminum substrate is greater than or equal to the thickness of the aluminum oxide layer 11. In one embodiment, the aluminum substrate may be selected to have a thickness of 50 μm or greater in order to obtain an aluminum oxide layer 11 having a thickness of 20 μm to 50 μm. Further, the thickness of the aluminum substrate is 60 μm or more.

In the embodiment of the present application, before the anodizing treatment, a degreasing treatment is further performed on the aluminum substrate, so as to remove oil stains on the surface of the aluminum substrate, which is beneficial for performing the subsequent processes. In one embodiment of the present application, degreasing is performed using a degreasing agent. The degreasing treatment removes stains on the surface of the aluminum substrate, and facilitates the preparation of the alumina layer 11. Furthermore, the concentration of the degreasing agent is 15g/L-50 g/L. Specifically, the concentration of the degreasing agent can be, but is not limited to, 15g/L, 18g/L, 20g/L, 23g/L, 25g/L, 30g/L, 35g/L, 40g/L, 48g/L or 50g/L, etc. It will be appreciated that the degreasing agent may be, but is not limited to, existing commercial degreasing agents. Furthermore, the degreasing temperature is 40-60 ℃, and the degreasing time is 2-10 min. The stain on the surface of the aluminum substrate can be rapidly removed under the degreasing condition. Specifically, the degreasing temperature can be, but is not limited to, 40 ℃, 43 ℃, 45 ℃, 50 ℃, 52 ℃, 55 ℃ or 60 ℃, and the degreasing time can be, but is not limited to, 2min, 3min, 4min, 5min or 6 min.

In this application, an aluminum substrate is placed in an electrolyte for anodizing. Specifically, the electrolyte includes at least one of sulfuric acid, oxalic acid, nitric acid, and the like. In one embodiment of the present application, the concentration of the electrolyte is 35ml/L to 60 ml/L. Specifically, the concentration of the electrolyte may be, but is not limited to, 35ml/L, 40ml/L, 45ml/L, 50ml/L, 55ml/L, or 60ml/L, etc. In another embodiment of the present application, the temperature of the anodic oxidation treatment is 15 ℃ to 35 ℃, and the time of the anodic oxidation treatment is 1min to 5 min. The porous alumina layer 11 having a good morphology can be obtained under the above electrolysis conditions. Specifically, the temperature of the anodic oxidation treatment can be, but is not limited to, 15 ℃, 20 ℃, 25 ℃, 32 ℃ or 35 ℃, and the time of the anodic oxidation treatment can be, but is not limited to, 1min, 2min, 3min, 4min or 5 min. In still another embodiment of the present application, the voltage of the anodic oxidation treatment is 10V to 20V. In one embodiment, the electrolyte is injected into an electrolytic cell, the aluminum substrate is placed in the electrolytic cell as an anode, and the anode and cathode are connected to a power source to perform the anodization process. Specifically, the material of the cathode may be, but is not limited to, platinum, copper, aluminum, stainless steel, and the like. In another embodiment, the aluminum substrate has a third surface and a fourth surface opposite to each other, and the aluminum substrate is anodized after forming a barrier layer on the third surface of the aluminum substrate. In this process, the alumina layer 11 is formed on the fourth surface of the aluminum substrate, which is more advantageous for the anodic oxidation reaction. In yet another embodiment, an aluminum substrate has third and fourth oppositely disposed surfaces, and an oxide layer is grown on both the third and fourth surfaces by exposing the aluminum substrate to an electrolyte.

In S102, the alumina layer 11 having a certain light transmittance is separated and subjected to a coloring treatment, whereby the ceramic decorative film 10 having an excellent appearance and mechanical properties can be obtained. In the present application, the aluminum oxide layer 11 is separated from the aluminum substrate, so that the ceramic decoration film 10 is prevented from affecting the transmission of electromagnetic waves during the application process, and the use thereof in the housing assembly 100 and the electronic device 200 is facilitated.

In the present embodiment, the alumina layer 11 is separated by at least one of heating and chemical etching. In the present application, the anodizing process forms a non-porous alumina layer and then forms a porous alumina layer 11. In one embodiment of the present application, the oxide layer formed by anodic oxidation includes the alumina layer 11 and a non-porous barrier layer, i.e., a non-porous alumina layer. That is, in separating the alumina layer 11, it is necessary to separate the alumina layer 11 from the non-porous barrier layer and the aluminum substrate. In one embodiment, the oxide layer is separated from the aluminum substrate by heating at a temperature greater than the melting point of the aluminum substrate and less than the melting point of the oxide layer; and then placing the nonporous barrier layer in the oxide layer in a first etching solution, and etching to remove the nonporous barrier layer to obtain the alumina layer 11. It is understood that the first etching solution is selected from solutions that chemically react with alumina, such as but not limited to phosphoric acid solution. In another embodiment, the aluminum substrate and the non-porous barrier layer are etched away in a second etching solution to obtain the aluminum oxide layer 11. It is understood that the second etching solution is selected from solutions that chemically react with both aluminum and aluminum oxide, such as but not limited to sodium hydroxide solution.

Referring to fig. 10, a schematic diagram of an anodization process according to an embodiment of the present invention is shown, in which an aluminum substrate is first placed in an anodization apparatus, a non-porous oxide layer is formed during the anodization process, an oxide layer with a pore structure is gradually formed as the anodization proceeds, and the depth of the pores is further increased as the anodization proceeds, so as to obtain an oxide layer with a plurality of pores with a desired size. Further, the oxide layer having the hole portion is separated to obtain the alumina layer 11.

In the present embodiment, the surface of the alumina layer 11 is treated with the surface conditioner, whereby coloring failure can be effectively prevented, coloring performance and uniformity of color tone can be improved, and variation in color tone can be avoided. Further, the concentration of the surface conditioning agent is 40g/L-75 g/L. Specifically, the concentration of the surface conditioner may be, but is not limited to, 40g/L, 48g/L, 50g/L, 55g/L, 60g/L, 62g/L, 70g/L, 75g/L, or the like. It is to be understood that the surface conditioner may be, but is not limited to, an existing commercially available surface conditioner. Further, the temperature of the surface conditioning agent treatment is 45-60 ℃, and the time of the surface conditioning agent treatment is 1-5 min. The treatment conditions are favorable for the subsequent coloring, and the coloring uniformity and the coloring efficiency are improved. Specifically, the temperature of the surface conditioner treatment may be, but is not limited to, 45 ℃, 48 ℃, 50 ℃, 52 ℃, 55 ℃ or 60 ℃, and the time of the surface conditioner treatment may be, but is not limited to, 1min, 2min, 3min, 4min or 5 min.

In one embodiment of the present application, the separated alumina layer 11 is placed in a colorant solution, and the colorant 12 is filled into the through-hole 110 in the alumina layer 11 to perform a coloring process. In the present application, the through-hole 110 of the alumina layer 11 has a small pore size, and the colorant 12 can be diffused, attached, and filled into the through-hole 110 by capillary action. The coloring method is simple and convenient to operate, and meanwhile, the alumina layer 11 is placed in the colorant solution, so that the filling speed and the filling amount of the colorant 12 at two ends of the through hole 110 are approximately the same, the uniformity of the coloring effect on two opposite surfaces of the alumina layer 11 is ensured, and the uniformity of the appearance effect of the ceramic decorative film 10 is improved. In one embodiment of the present application, the concentration of the colorant solution is from 5g/L to 10 g/L. Specifically, the concentration of the colorant solution may be, but is not limited to, 5g/L, 6g/L, 7g/L, 8g/L, 9g/L, or 10g/L, etc. In another embodiment of the present application, the temperature of the coloring treatment is 30 ℃ to 60 ℃ and the coloring time is 5min to 20 min. The ceramic decorative film 10 having a good coloring effect can be obtained under the above coloring conditions. Specifically, the temperature of the coloring treatment may be, but not limited to, 30 ℃, 35 ℃, 38 ℃, 40 ℃, 45 ℃, 50 ℃ or 55 ℃ and the coloring time may be, but not limited to, 5min, 9min, 10min, 13min, 15min or 17 min. In another embodiment of the present application, the colorant 12 may be filled into the through holes 110 through the mesh of the screen by screen printing. In yet another embodiment of the present application, the colorant 12 is evaporated in a vacuum environment to be deposited in the through-holes 110. In the present application, the kind of the colorant 12 may be selected as needed, and for example, an organic water-soluble colorant, an organic oil-based colorant, and the like are selected.

In an embodiment of the present application, the method for preparing the housing further includes: after the coloring treatment, a sealing treatment is performed so that the opening at the end of the through-hole 110 is filled with the sealant 13 and closed. Through the hole sealing treatment, the colorant 12 is sealed inside the through hole 110, and the color appearance of the ceramic decoration film 10 is ensured. In one embodiment of the present application, the sealing is performed by placing the aluminum oxide layer 11 after the coloring treatment in a sealant solution having a concentration of 25ml/L to 50 ml/L. Specifically, the concentration of the sealant solution may be, but is not limited to, 25ml/L, 30ml/L, 35ml/L, 40ml/L, 45ml/L, or 50ml/L, etc. In the present application, the sealant may be dispersed, but not limited to, with a sodium acetate liquid, configured as a sealant solution. In another embodiment of the present application, the temperature of the hole sealing treatment is 80 ℃ to 95 ℃, and the time of the hole sealing treatment is 30min to 60 min. The hole sealing treatment is carried out under the high temperature condition, so that the through hole 110 of the alumina layer 11 can be effectively sealed, and the colorant 12 is protected. Specifically, the temperature of the sealing treatment can be, but is not limited to, 80 ℃, 83 ℃, 85 ℃, 89 ℃, 90 ℃, 91 ℃ or 94 ℃, and the time of the sealing treatment can be, but is not limited to, 30min, 35min, 40min, 45min, 50min or 55 min.

It can be understood that after the degreasing treatment, the anodic oxidation treatment, the coloring treatment and the hole sealing treatment, the water can be used for cleaning, such as deionized water, ultrapure water, distilled water and the like, to remove the residual solvent, which is beneficial to the subsequent operation. In one embodiment of the present application, the washing is carried out at 15 ℃ to 35 ℃ for 1min to 5 min. Specifically, the water washing temperature may be, but not limited to, 15 ℃, 20 ℃, 25 ℃, 32 ℃ or 35 ℃, and the water washing time may be, but not limited to, 1min, 2min, 2.5min, 3min, 4min or 5 min.

In one embodiment of the application, the aluminum alloy foil is placed in 30g/L degreasing agent solution, treated at 60 ℃ for 5min and then washed in 25 ℃ water for 1min, and the degreasing agent is TOP GREENAL CLEAN 100 of Oye, Japan; placing the aluminum alloy foil in sulfuric acid electrolyte for anodic oxidation treatment, wherein the electrolyte is 50ml/L electrolyte formed by mixing 98% sulfuric acid and water, carrying out anodic oxidation treatment at 25 ℃ for 2min, and then washing with water; the aluminum substrate and a portion of the oxide layer are then placed in a sodium hydroxide solution and separated to provide an aluminum oxide layer 11 as shown in FIG. 3. Placing the alumina layer 11 in a surface conditioner solution, and treating at 55 ℃ for 5min, wherein the concentration of the surface conditioner solution is 50g/L, and the surface conditioner is TAC (hydrochloric acid) sodium 121 of Japan and Australia; washing with water, placing the alumina layer 11 in a colorant solution, and treating at 50 deg.C for 15min, wherein the colorant solution has a concentration of 10g/L, and the colorant is TAC BLACK-SLH (415) of Oye, Japan; and (3) after washing, placing the colored alumina layer 11 in a sealant solution, treating at 90 ℃ for 60min, wherein the concentration of the sealant solution is 40ml/L, and the coloring agent is Japanese Australian sealant H-298, and then washing to obtain the ceramic decorative film 10. Fig. 11 is a photograph of the ceramic decorative film obtained in this example.

Referring to fig. 12, a schematic structural diagram of a housing assembly according to an embodiment of the present disclosure is shown, in which the housing assembly 100 includes a housing 20 and a ceramic decoration film 10 disposed on a surface of the housing 20, and the ceramic decoration film 10 includes the ceramic decoration film 10 according to any one of the embodiments. Through setting up ceramic decorating film 10 on casing 20 for the outward appearance colour designability of casing subassembly 100 is stronger, and visual effect is better, more can satisfy user's demand, can not influence electromagnetic wave's transmission simultaneously, is favorable to the application of casing subassembly 100 in electronic equipment 200.

In the present embodiment, the material of the housing 20 includes at least one of glass, ceramic, plastic, fiberglass and metal. Specifically, the case 20 may be a light-transmitting layer or a light-impermeable layer. In one embodiment, at least one of glass, ceramic, plastic, and fiberglass may be selected to form the housing 20 with light transmissive properties. In another embodiment, at least one of ceramic, fiberglass, and metal may be selected to form the housing 20 with opaque properties. Specifically, the housing 20 may be, but is not limited to, a polycarbonate and polymethylmethacrylate composite housing, a fiberglass housing, a glass housing, a ceramic housing, or the like. It will be appreciated that in use of the housing 20, the housing 20 includes oppositely disposed inner and outer surfaces; when the casing 20 is a light-transmitting layer, the ceramic decorative film 10 may be disposed on the inner surface of the casing 20, or may be disposed on the outer surface of the casing 20; when the case 20 is a light-impermeable layer, the ceramic decoration film 10 is disposed on the outer surface of the case 20, so that the case assembly 100 may exhibit the color of the ceramic decoration film 10. In the present application, the thickness of the case 20 is not particularly limited. In the present embodiment, the thickness of the case 20 is 0.1mm to 0.8 mm. Specifically, the thickness of the housing 20 may be, but not limited to, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, or 0.8mm, so as to meet the requirement of impact resistance, and not too thick, which meets the requirement of light weight and thin weight. In the present application, the housing 20 may have a uniform thickness or a non-uniform thickness, such as a gradual thickness, to achieve different appearance effects. In the present application, the housing 20 may be a middle frame, a rear cover, or the like of the electronic apparatus 200, which is not limited thereto. In the present application, the housing 20 and the ceramic decoration film 10 may be connected by, but not limited to, an optical glue.

In the present embodiment, the housing assembly 100 may further include at least one of an optical film layer 30, a non-conductive metal layer 40, and a texture layer 50. The optical film layer 30 is arranged to enable the shell assembly 100 to present visual effects of different color changes at different angles, the non-conductive metal layer 40 is arranged to give metal texture to the shell assembly 100, and the texture layer 50 is arranged to improve the texture appearance effect of the shell assembly 100. It is understood that when the housing 20 is a light-transmitting layer, the optical film layer 30, the non-conductive metal layer 40, and the texture layer 50 may be disposed on the inner surface of the housing 20, or may be disposed on the outer surface of the housing 20; when the housing 20 is a light-impermeable layer, the optical film layer 30, the non-conductive metal layer 40, and the texture layer 50 are disposed on the outer surface of the housing 20, so that the housing assembly 100 can exhibit its appearance.

In the present application, the optical film 30 is a layer of optical medium material that transmits light through its interface, and can change the reflection, refraction, etc. of light passing through the optical film 30, so that the housing assembly 100 can exhibit a certain gloss change, such as visual effect of different color gloss at different angles. The reflectivity, the refractive index and the light transmittance of the optical film layer 30 are changed by changing the material, the thickness, the number of layers and the like of the optical film layer 30, so that different visual effects are realized, and the requirements under different scenes are met. In the present embodiment, the optical film layer 30 includes at least one high refractive optical film and at least one low refractive optical film, and the high refractive optical film and the low refractive optical film are alternately stacked. By high refractive index lightThe optical films and the low refractive index optical films are alternately stacked, so that the optical film layer 30 realizes color change at different angles, and a visual effect of light and shadow flowing is generated. Specifically, the optical film layer 30 may include, but is not limited to, 2, 3, 4, 5, 6, 7, or 8 optical films. Optionally, the thickness of the optical film layer 30 is 80nm to 600nm, and specifically, but not limited to, 80nm, 100nm, 150nm, 250nm, 300nm, 450nm, 550nm, and the like, so as to ensure the gloss texture effect of the optical film layer 30, and the optical film layer 30 is stable inside, not easy to crack or fall off, and is beneficial to showing the visual effect of the optical film layer 30, and simultaneously ensures the service life of the optical film layer 30. In one embodiment of the present application, the high index optical film has a refractive index of 2 to 3 and the low index optical film has a refractive index of 1.1 to 1.7. By alternately stacking the high refractive index optical films and the low refractive index optical films, rich visual effects can be realized, and the appearance of the housing assembly 100 can be improved. In another embodiment of the present disclosure, the material of the high refractive index optical thin film includes at least one of titanium dioxide, tantalum pentoxide, niobium pentoxide, zinc sulfide and zirconium dioxide, and the material of the low refractive index optical thin film includes at least one of silicon monoxide, silicon dioxide and magnesium fluoride. In one embodiment, the optical film 30 comprises SiO 4nm-6nm thick₂Layer of 7nm-9nm thick Nb₂O₅Layer of SiO 29nm-35nm thick₂Layer of 87nm-105nm thick Nb₂O₅Layer of 119nm-139nm thick SiO₂Layer of Nb 69nm-83nm thick₂O₅Layer of SiO 70nm-84nm thick₂Layer and 42nm-50nm thick Nb₂O₅And (3) a layer. In the embodiment of the present application, the optical transmittance of the optical film layer 30 is greater than 50%, so that the visual effect of other layer structures can be exhibited. Further, the optical transmittance of the optical film layer 30 is greater than 60%, 70%, 80%, or 90%. In the present application, the method of forming the optical film layer 30 is not particularly limited, and may be formed by, but not limited to, a deposition method such as vacuum evaporation, magnetron sputtering, ion plating, non-conductive plating, and the like.

In the present application, the housing assembly 100 has a metal texture by disposing the non-conductive metal layer 40. The material of the non-conductive metal layer 40 is not particularly limited, and those skilled in the art can select the material according to the required metallic luster effect of the housing assembly 100. In an embodiment of the present application, the material of the non-conductive metal layer 40 includes at least one of indium, tin, aluminum and silver, so that the housing assembly 100 has a significant metallic luster and texture. In another embodiment of the present application, the thickness of the non-conductive metal layer 40 is less than or equal to 40nm to ensure the non-conductivity of the non-conductive metal layer 40. Specifically, the thickness of the non-conductive metal layer 40 may be, but is not limited to, 10nm, 15nm, 20nm, 30nm, 35nm, 40nm, or the like. In a specific embodiment, the non-conductive metal layer 40 is made by a non-conductive plating process (NCVM), and the thickness uniformity and compactness of the made non-conductive metal layer 40 are good, so that the housing assembly 100 has uniform and flat metal luster, generates a mirror effect, has a high reflection effect, improves the metal texture of the housing assembly 100, and does not affect the wireless communication transmission effect when used for the electronic device 200. In this application, the non-conductive metal layer 40 is an opaque layer.

In the present application, the appearance of the housing assembly 100 can be improved by providing the texture layer 50. In one embodiment of the present application, the textured layer 50 has an optical transmittance greater than 50%. Further, the textured layer 50 has an optical transmittance of greater than 60%, 70%, 80%, or 90%. In another embodiment of the present application, the thickness of the texture layer 50 may be 5 μm to 20 μm, and particularly, but not limited to, 6 μm, 7 μm, 8 μm, 10 μm, 13 μm, 15 μm, or 17 μm, and within this thickness range, a good texture effect may be formed, which ensures that the impact resistance of the texture layer 50 is poor, prevents cracking, and can form a distinct texture to improve the appearance of the housing assembly 100. In yet another embodiment of the present application, the texture layer 50 has a plurality of texture structures thereon, such that the texture layer 50 presents a textured appearance; specifically, the texture structure is selected from at least one of a micro lens, a linear cylindrical lens, a curved cylindrical lens, a small short line, a fresnel lens and a CD pattern, so as to improve the appearance effect of the housing assembly 100. In the present application, the texturing layer 50 may be formed by transferring an ultraviolet light curing paste.

In the present embodiment, the housing assembly 100 may further include an explosion-proof membrane 60, and the explosion-proof membrane 60 is disposed on a surface of the housing 20. The explosion-proof membrane 60 is arranged to improve the impact resistance of the housing assembly 100, and thus, the housing assembly 100 is protected to a certain extent. Specifically, the explosion-proof membrane 60 may be, but is not limited to, a PET explosion-proof membrane, etc., and the thickness of the explosion-proof membrane 60 may be, but is not limited to, 40 μm to 60 μm. In one embodiment, the aluminum oxide layer 11 and the PET explosion-proof film with the thickness of 50 μm are bonded together by the optical transparent adhesive and then attached to the surface of the cylinder with the radius of greater than or equal to 4mm, the composite film does not crack, and the bending resistance is further improved.

In the embodiment, the housing assembly 100 may further include a light shielding layer 70. The light shielding layer 70 is used to optically shield one side of the housing assembly 100, which is advantageous for the use of the housing assembly 100 in the electronic device 200. In an embodiment of the present application, the optical transmittance of the light shielding layer 70 is less than 5%. Further, the optical transmittance of the light shielding layer 70 is less than 3%. The color of the light-shielding layer 70 is not particularly limited, and may be flexibly selected by those skilled in the art as needed, and may include, but is not limited to, red, orange, gray, black, etc. Therefore, any different colors can be selected to meet the use requirements of different users. Specifically, when the housing assembly 100 is applied to the electronic device 200, the color of the light shielding layer 70 may be gray or gray-black. In the present application, the thickness of the light shielding layer 70 is not particularly limited. In one embodiment, the light-shielding layer 70 has a thickness less than or equal to 60 μm. Further, the light-shielding layer 70 has a thickness of 15 μm to 60 μm. Specifically, the thickness of the light-shielding layer 70 may be, but not limited to, 15 μm, 18 μm, 20 μm, 25 μm, 30 μm, 40 μm, or 55 μm. In an embodiment of the present application, the light shielding layer 70 is an ink layer and can be formed by coating, for example, by screen printing or inkjet printing. For example, by forming the light shielding layer 70 by screen printing the ink, the method can be applied to various types of ink, and the ink layer has strong covering power, is not limited by the surface shape and the area size of the substrate, and has great flexibility and wide applicability. In a specific embodiment, the white pigment and the epoxy resin are mixed to form a white ink, the carbon powder and the matting powder are mixed to form a black ink, and the first white ink layer with a thickness of 10 μm to 12 μm, the second white ink layer with a thickness of 7 μm to 11 μm, the third white ink layer with a thickness of 7 μm to 11 μm, the first black ink layer with a thickness of 7 μm to 11 μm, and the second black ink layer with a thickness of 7 μm to 11 μm are sequentially coated to form the light-shielding layer 70.

The following description will be given taking the case 20 as a light-impermeable layer and each film layer provided on the outer surface of the case 20 as an example; when the casing 20 is a transparent layer, the arrangement of each film layer is changed as required, and will not be described herein again.

Referring to fig. 13, which is a schematic structural diagram of a housing assembly according to another embodiment of the present disclosure, the housing assembly 100 includes a housing 20, a ceramic decoration film 10, and an optical film layer 30, which are stacked. By arranging the ceramic decorative film 10 and the optical film layer 30, the color change effect of the shell 20 is improved, and the appearance expressive force is improved. In another embodiment of the present application, the housing assembly 100 includes a housing 20, an optical film layer 30, and a ceramic decoration film 10, which are stacked.

Referring to fig. 14, which is a schematic structural diagram of a housing assembly according to another embodiment of the present disclosure, a housing assembly 100 includes a housing 20, a non-conductive metal layer 40, and a ceramic decoration film 10. The film 10 is decorated by providing a non-conductive metal layer 40 and a ceramic. In the present application, the ceramic decoration film 10 is closer to the outer surface side of the housing assembly 100 than the non-conductive metal layer 40, so that the appearance effect of both the ceramic decoration film 10 and the non-conductive metal layer 40 can be presented.

Referring to fig. 15, a schematic structural diagram of a housing assembly according to another embodiment of the present disclosure is shown, in which the housing assembly 100 includes a housing 20, a ceramic decorative film 10 and a texture layer 50 which are stacked. In the present application, the texture layer 50 is closer to the outer surface side of the housing assembly 100 than the ceramic decoration film 10, so that the ceramic decoration film 10 can play a role in supporting the texture effect of the texture layer 50, and the texture effect of the texture layer 50 is more obvious.

Referring to fig. 16, which is a schematic structural diagram of a housing assembly according to another embodiment of the present disclosure, the housing assembly 100 includes a housing 20, an explosion-proof membrane 60, and a ceramic decoration membrane 10, which are stacked, so that the visual effect and the service life of the housing assembly 100 are improved.

Referring to fig. 17, a structural schematic diagram of a housing assembly according to another embodiment of the present disclosure is shown, in which the housing assembly 100 includes a housing 20, a light shielding layer 70 and a ceramic decoration film 10 which are stacked. The light shielding layer 70 can shield light from one side of the housing assembly 100, which is beneficial for the application of the electronic device 200. The ceramic decorative film 10 is closer to the outer surface side of the case assembly 100 than the light shield layer 70, so that the appearance effect of the ceramic decorative film 10 can be exhibited.

Referring to fig. 18, a schematic structural diagram of a housing assembly according to another embodiment of the present disclosure is shown, in which the housing assembly 100 includes a housing 20, a light shielding layer 70, an explosion-proof film 60, an optical film layer 30, and a ceramic decoration film 10, which are stacked. The housing assembly 100 has a high gloss texture, a color appearance, and good impact resistance, and is advantageous for use in electronic devices. It is understood that the optical film layer 30 and the ceramic decoration film 10 may be connected by, but not limited to, optical glue.

The present application further provides an electronic device 200 including the housing assembly 100 of any of the above embodiments. It is understood that the electronic device 200 may be, but is not limited to, a cell phone, a tablet computer, a notebook computer, a watch, an MP3, an MP4, a GPS navigator, a digital camera, etc. Referring to fig. 19, a schematic structural diagram of an electronic device according to an embodiment of the present disclosure is shown, in which the electronic device 200 includes a housing assembly 100. The housing assembly 100 can improve the appearance effect of the electronic device 200, so that the electronic device has rich and changeable color appearance, does not influence the transmission of electromagnetic waves, and is beneficial to the use of the electronic device. Referring to fig. 20, which is a schematic view illustrating a structure of an electronic device according to an embodiment of the present disclosure, a structure of the electronic device 200 may include an RF circuit 210, a memory 220, an input unit 230, a display unit 240, a sensor 250, an audio circuit 260, a WiFi module 270, a processor 280, a power supply 290, and the like. The RF circuit 210, the memory 220, the input unit 230, the display unit 240, the sensor 250, the audio circuit 260, and the WiFi module 270 are respectively connected to the processor 280; the power supply 290 is used to supply power to the entire electronic device 200. Specifically, the RF circuit 210 is used for transmitting and receiving signals; the memory 220 is used for storing data instruction information; the input unit 230 is used for inputting information, and may specifically include other input devices such as a touch panel and operation keys; the display unit 240 may include a display screen or the like; the sensor 250 includes an infrared sensor, a laser sensor, etc. for detecting a user approach signal, a distance signal, etc.; the speaker 261 and the microphone 262 are connected with the processor 280 through the audio circuit 260 and used for emitting and receiving sound signals; the WiFi module 270 is configured to receive and transmit WiFi signals; the processor 280 is used for processing data information of the electronic device 200.

The foregoing detailed description has provided for the purposes of providing a thorough understanding of the present embodiments, and has illustrated and described the principles and embodiments of the present application, but it is to be understood that this disclosure is only illustrative of the methods and their core concepts; meanwhile, for a person skilled in the art, according to the idea of the present application, the specific embodiments and the application range may be changed. In view of the above, the description should not be taken as limiting the application.