CN117794119A - Shell structure, manufacturing method thereof and electronic equipment - Google Patents
Shell structure, manufacturing method thereof and electronic equipment Download PDFInfo
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- CN117794119A CN117794119A CN202311664628.7A CN202311664628A CN117794119A CN 117794119 A CN117794119 A CN 117794119A CN 202311664628 A CN202311664628 A CN 202311664628A CN 117794119 A CN117794119 A CN 117794119A
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- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000000758 substrate Substances 0.000 claims abstract description 66
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 58
- 239000002346 layers by function Substances 0.000 claims abstract description 55
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 41
- 230000003068 static effect Effects 0.000 claims description 35
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 239000010702 perfluoropolyether Substances 0.000 claims description 27
- 229910000077 silane Inorganic materials 0.000 claims description 27
- 239000002131 composite material Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 21
- 239000011521 glass Substances 0.000 claims description 19
- 238000010329 laser etching Methods 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 10
- 230000005660 hydrophilic surface Effects 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims 1
- 238000011282 treatment Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 230000003666 anti-fingerprint Effects 0.000 description 12
- 239000003365 glass fiber Substances 0.000 description 12
- 238000001746 injection moulding Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000011109 contamination Methods 0.000 description 8
- 239000004033 plastic Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
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- 230000003746 surface roughness Effects 0.000 description 6
- 238000012876 topography Methods 0.000 description 6
- 238000005034 decoration Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000010147 laser engraving Methods 0.000 description 4
- 238000013532 laser treatment Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 230000003075 superhydrophobic effect Effects 0.000 description 4
- 239000004831 Hot glue Substances 0.000 description 3
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
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- VTLYHLREPCPDKX-UHFFFAOYSA-N 1,2-dichloro-3-(2,3-dichlorophenyl)benzene Chemical compound ClC1=CC=CC(C=2C(=C(Cl)C=CC=2)Cl)=C1Cl VTLYHLREPCPDKX-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 229910052705 radium Inorganic materials 0.000 description 1
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Laminated Bodies (AREA)
Abstract
The embodiment of the application provides a shell structure, a preparation method thereof and electronic equipment, and relates to the technical field of electronic equipment. The housing structure includes: a substrate comprising a first surface and a second surface opposite to each other, wherein the first surface is formed with a plurality of M rows and N columns of protrusions, M is a positive integer greater than or equal to 1, N is a positive integer greater than or equal to 1, and the first surface comprises at least one functional area; the functional layer is positioned on one side of the first surface, which is away from the second surface, and is arranged on the functional area of the first surface. Because the multiple protruding parts arranged in the array form the super-hydrophilic surface structure, better hydrophobic effect can be obtained when the super-hydrophilic surface structure is subjected to hydrophobic treatment, and better hydrophilic effect can be obtained when the super-hydrophilic surface structure is subjected to hydrophilic treatment.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a shell structure, a manufacturing method thereof and electronic equipment.
Background
With the rapid development of terminals such as smart phones and tablet computers, various terminal housings have been developed. Exemplary terminal housings include glass housings, plastic housings, metal housings, ceramic housings, housings formed by splicing substrates such as metal, glass fiber plates, composite plates, injection molded parts and the like with plain skins, and the like.
In the daily use process of electronic products such as smart phones, tablet computers and the like, the surfaces of a glass shell, a plastic shell, a metal shell and the like are easy to adhere to dirt such as fingerprints, sebum and the like of users; the shell formed by splicing the base materials such as metal, glass fiber plates, composite plates, injection molding pieces and the like and the plain skin can have the problem of stripping the base materials and the plain skin.
Disclosure of Invention
In order to solve the technical problems, the application provides a shell structure, a manufacturing method thereof and electronic equipment. Can solve the problems that the surfaces of the prior glass shell, plastic shell, metal shell and the like are easy to adhere to the dirt such as fingerprints, sebum and the like of users, and the shell formed by splicing the base materials such as metal, glass fiber plates, composite plates, injection molding parts and the like with the plain skin has the stripping problem of the base materials and the plain skin.
In a first aspect, embodiments of the present application provide a housing structure, the housing structure comprising: the substrate comprises a first surface and a second surface which are opposite, wherein M rows and N columns of a plurality of protruding parts are formed on the first surface, M is a positive integer greater than or equal to 1, N is a positive integer greater than or equal to 1, and the first surface comprises at least one functional area; the functional layer is positioned on one side of the first surface, which is away from the second surface, and is arranged on the functional area of the first surface.
Because the plurality of protruding portions uniformly arranged on the first surface form the super-hydrophilic surface structure, when the super-hydrophilic surface structure is subjected to hydrophobic treatment, a better hydrophobic effect (more than 130 degrees in static contact angle) can be obtained, the degree of contamination by greasy dirt is weakened, and when the super-hydrophilic surface structure is subjected to hydrophilic treatment, a better hydrophilic effect (less than 20 degrees in static contact angle) can be obtained, so that the bonding strength of the second functional layer and the first surface is improved.
The functional layer may be, for example, a hydrophobic layer; or skin; and a part of the shell structure can be a hydrophobic layer and a part of the shell structure can be a plain skin to form a spliced shell structure. Of course, the functional layers are not limited to the above examples, and those skilled in the art can set the functional layers according to actual situations.
According to a first aspect, the first surface comprises a first functional area and a second functional area, and the functional layer comprises a first functional layer and a second functional layer; the first functional layer is arranged on the first functional area of the first surface, and the second functional layer is arranged on the second functional area of the first surface.
By the arrangement, the requirements of different shell structures can be met, and the application range of the shell structure is wider.
Of course, the first surface may further include more functional areas, and further more functional layers are disposed on the more functional areas, so as to meet different requirements of the housing structure.
According to a first aspect, or any implementation of the first aspect above, the first functional layer comprises a hydrophobic layer.
Because the plurality of protruding parts evenly arranged on the first surface form a super-hydrophilic surface structure, the hydrophobic layer arranged on the structure has better hydrophobic effect (the static contact angle is more than 130 degrees), and the degree of greasy dirt contamination can be weakened.
According to the first aspect, or any implementation manner of the first aspect, the material of the hydrophobic layer includes perfluoropolyether or silane substance, etc.
Of course, the material of the hydrophobic layer is not limited to perfluoropolyether or silane, and those skilled in the art can choose the material of the hydrophobic layer according to the actual situation.
According to a first aspect, or any implementation manner of the first aspect, the second functional layer includes a skin.
Because the plurality of protruding parts that the first surface was evenly arranged form super hydrophilic surface structure, consequently, can improve the bonding strength of plain skin and first surface, avoid appearing plain skin and substrate peeling off the problem.
According to the first aspect, or any implementation manner of the first aspect, the shape of the protruding portion includes a cuboid, a prism, a cone, a cylinder, or the like.
Of course, the shape of the protruding portion is not limited to a rectangular parallelepiped, a prismatic body, a pyramidal body, or a cylindrical body, and those skilled in the art can set the shape of the protruding portion according to actual circumstances.
When the shape of the protruding portion is a prism, the wear resistance of the housing structure can be improved.
According to a first aspect, or any implementation manner of the first aspect, when the shape of the protruding portion includes a cuboid or a prism, a side length of the protruding portion and a distance between two adjacent protruding portions satisfy: H1/H2 is more than or equal to 0.9 and less than or equal to 1.1; wherein H1 is the side length of the protruding parts, and H2 is the distance between two adjacent protruding parts.
By the arrangement, the problems that the abrasion resistance of the shell structure is poor when the H1/H2 is too large and the hydrophobic effect is poor when the H1/H2 is too small can be avoided.
Illustratively, H1/H2 is equal to 1, 0.9, 1.1, or the like.
According to the first aspect, or any implementation manner of the first aspect above, 2 μm is equal to or less than 50 μm for H1, 2 μm is equal to or less than 50 μm for H2, and 2 μm is equal to or less than 50 μm for H3, wherein H3 is the height of the protruding portion.
By this arrangement, the problem of poor abrasion resistance of the housing structure when H1, H2 and/or H3 is too large and poor water repellency when H1, H2 and/or H3 is too small can be avoided.
Exemplary H1 is 2 μm, 10 μm, 20 μm, 30 μm, 40 μm or 50 μm.
Exemplary H2 is 2 μm, 10 μm, 20 μm, 30 μm, 40 μm or 50 μm.
Exemplary H3 is 2 μm, 10 μm, 20 μm, 30 μm, 40 μm or 50 μm.
H1, H2 and H3 may be the same or different, or any two may be the same.
According to the first aspect, or any implementation manner of the first aspect, the substrate includes metal, glass fiber board, composite board, injection molding or the like.
Of course, the material of the substrate is not limited to metal, glass fiber board, composite board or injection-molded part, and those skilled in the art can select the material of the substrate according to actual circumstances.
According to the first aspect, or any implementation manner of the first aspect, the static contact angle of the first surface of the substrate is less than or equal to 20 °.
It will be appreciated that when the heights of the protrusions are different, different static contact angles may be obtained, and therefore, the heights of the protrusions may be set according to the need for a static contact angle of the first surface of the substrate.
According to a first aspect, or any implementation manner of the first aspect, the functional layer is a hydrophobic layer, and a static contact angle of the hydrophobic layer is greater than or equal to 130 °. Namely, the shell structure provided by the application can obtain better hydrophobic effect.
In a second aspect, embodiments of the present application provide an electronic device, where the electronic device includes the housing structure of any one of the first aspect and the first aspect.
Any implementation manner of the second aspect and the second aspect corresponds to any implementation manner of the first aspect and the first aspect, respectively. The technical effects corresponding to the second aspect and any implementation manner of the second aspect may be referred to the technical effects corresponding to the first aspect and any implementation manner of the first aspect, which are not described herein.
In a third aspect, an embodiment of the present application provides a method for preparing a shell structure, where the method for preparing a shell structure provided in the embodiment of the present application is used to prepare a shell structure according to the first aspect;
the preparation method of the shell structure comprises the following steps: providing a substrate, wherein the substrate comprises a first surface and a second surface which are opposite; carrying out laser engraving on the first surface by using femtosecond laser to form a plurality of M rows and N columns of convex parts, wherein M is a positive integer greater than or equal to 1, N is a positive integer greater than or equal to 1, and the first surface comprises at least one functional area; a functional layer is disposed on the functional area of the first surface.
Any implementation manner of the third aspect and any implementation manner of the third aspect corresponds to any implementation manner of the first aspect and any implementation manner of the first aspect, respectively. The technical effects corresponding to the third aspect and any implementation manner of the third aspect may be referred to the technical effects corresponding to the first aspect and any implementation manner of the first aspect, which are not described herein.
According to a third aspect, the first surface comprises a first functional area and a second functional area; providing a functional layer on the functional area of the first surface, comprising: disposing a first functional layer on a first functional region of the first surface; a second functional layer is disposed on the second functional region of the first surface.
According to a third aspect, or any implementation of the above third aspect, the first functional layer comprises a hydrophobic layer; disposing a first functional layer on a first functional area of the first surface, comprising: baking or depositing with perfluoropolyether or silane on the first functional region of the first surface to form a hydrophobic layer on the first functional region of the first surface.
According to a third aspect, or any implementation manner of the above third aspect, the second functional layer includes a plain skin; disposing a second functional layer on a second functional region of the first surface, comprising: treating the second functional region on the first surface with a hydrophilic surface chemical modifier; the plain skin is arranged in the second functional area of the first surface through the bonding glue.
The specific materials of the hydrophilic surface chemical modifier are limited in this application, and those skilled in the art can choose the materials according to the actual situation.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 2 is an exploded schematic view of an electronic device according to an embodiment of the present application;
FIGS. 3 a-3 d are schematic diagrams of rear structures of electronic devices with different housing structures;
fig. 4 is a film layer diagram of a shell structure according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a substrate according to an embodiment of the present disclosure;
FIG. 6 is a partial perspective view of a first surface provided in an embodiment of the present application;
FIG. 7 is a graph showing the super-hydrophilicity of a substrate subjected to femtosecond laser etching according to the embodiment of the application;
FIG. 8 is a film layer diagram of yet another housing structure provided in an embodiment of the present application;
FIG. 9 is a schematic diagram of a front structure of a further substrate according to an embodiment of the present disclosure;
FIG. 10 is a schematic diagram of a front structure of a further substrate according to an embodiment of the present disclosure;
FIG. 11 is a schematic diagram of a front structure of another substrate according to an embodiment of the present disclosure;
fig. 12 is a schematic perspective view of a boss according to an embodiment of the present disclosure;
fig. 13 is a flowchart of a method for manufacturing a shell structure according to an embodiment of the present disclosure;
FIG. 14 is a typical morphology and dimension diagram of a first surface subjected to femtosecond laser etching according to an embodiment of the present application;
FIGS. 15-18 are topography diagrams of a plurality of protrusions formed in M rows and N columns on a first surface of a substrate according to embodiments of the present application by a femtosecond laser etching process at different heights;
fig. 19 is a trend chart of the surface roughness, static contact angle and static contact angle of the first surface subjected to femtosecond laser treatment after AF coating of the first surface of the convex portion at different heights provided in the embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.
The terms first and second and the like in the description and in the claims of embodiments of the present application are used for distinguishing between different objects and not necessarily for describing a particular sequential order of objects. For example, the first target object and the second target object, etc., are used to distinguish between different target objects, and are not used to describe a particular order of target objects.
In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, the plurality of processing units refers to two or more processing units; the plurality of systems means two or more systems.
The embodiment of the application provides an electronic device, which may be a mobile phone, a notebook computer, a tablet computer, a personal digital assistant (personal digital assistant, PDA for short), an intelligent wearable device (such as an intelligent watch, an intelligent bracelet, an intelligent head-mounted display, and intelligent glasses), etc., and the embodiment of the application does not limit the specific form of the electronic device. For convenience of explanation, the electronic device is exemplified as a mobile phone.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where fig. 1 (1) is a schematic front structural diagram of the electronic device, and fig. 1 (2) is a schematic rear structural diagram of the electronic device. As shown in fig. 1, the mobile phone 100 includes a housing structure (when the electronic device is a mobile phone, a tablet computer, or the like, it may also be called a battery cover, a rear case, or the like, and when the electronic device is a notebook computer, a smart watch, or the like, it may also be called a structural member, a case, or the like) 10, a display panel 20, and a middle frame 30 between the housing structure 10 and the display panel 20.
In fig. 1, the mobile phone 100 has a rectangular flat plate shape. In other alternative embodiments of the present application, the shape of the electronic device may also be square flat plate, circular flat plate, oval flat plate, etc. Of course, the electronic device may be a folder type electronic device or the like.
Referring to fig. 2, fig. 2 is an exploded schematic diagram of an electronic device according to an embodiment of the present application. As shown in fig. 2, the housing structure 10, the display panel 20, and the middle frame 30 may enclose a receiving cavity. The housing has a structure of a printed circuit board (Printed Circuit Board, PCB) 40, a battery 50, a functional device 60, and the like. In the embodiment of the present application, the PCB 40 includes a main board 41 and a sub-board 42, and the functional device 60 includes, for example, a flash 61, a rear camera 62, and the like, and the rear camera 62 may be electrically connected to the main board 41 through an FPC 70. The number of rear cameras 62 may be one or more. When the number of the rear cameras 62 is plural, the functions of the plural rear cameras 62 may be different. For example, in one possible implementation, one of the rear cameras 62 is responsible for panning, one of the rear cameras 62 is responsible for zooming, one of the rear cameras 62 is responsible for wide angle, etc.
The mobile phone 100 further comprises a camera decoration 80 for decorating the camera, the shell structure 10 is provided with a decoration hole 11, the camera decoration 80 is arranged at the decoration hole 11, and the rear camera 62 is opposite to the decoration body 80.
The housing structure 10 may include a glass housing, a plastic housing, a metal housing, etc.; the shell can also be formed by splicing base materials such as metal, glass fiber plates, composite plates, injection molding pieces and the like with the plain skin, or can be formed by mutually splicing the metal, glass, the plain skin and the composite plates.
For example, see fig. 3 a-3 d, where fig. 3 a-3 d are schematic rear views of the electronic device in different housing configurations. As shown in fig. 3 a-3 c, the shell structure 10d is formed by splicing glass and a skin, wherein the region (1) is glass, and the region (2) is a skin. When the shell structure 10d is formed by splicing glass and a skin, the glass can be used as a base material, and then the skin is adhered to the glass base material and the corresponding area (2). As shown in fig. 3d, the shell structure 10d is formed by splicing a composite board and metal, where the area (1) is the composite board and the area (2) is the metal. When the shell structure 10d is a shell structure formed by splicing a composite board and metal, the composite board can be used as a base material, and then a metal layer is arranged on the base material of the composite board and in a corresponding area (2).
It will be appreciated that in fig. 3 a-3 d, when the shape of the camera trim 80 is changed, the shape of the trim hole 11 formed in the housing structure 10 is also changed.
In order to prevent the surfaces of glass shells, plastic shells, metal shells and the like from being easily adhered with dirt such as fingerprints and sebum of users in the daily use process of electronic products such as smart phones, tablet personal computers and the like, a hydrophobic layer is generally formed by directly spraying or coating a film on the base materials such as metal, glass fiber plates, composite plates, injection molding parts and the like subjected to frosting (Abrasive Grinding and AG) treatment, namely, a super-hydrophobic oleophobic coating is arranged on the surface of one side which can be contacted by the users so as to improve the dirt resistance of the cover plate.
In order to set the element skin on the base material such as metal, glass fiber board, composite board, injection molding piece and the like, an adhesive layer is arranged between the element skin and the base material.
However, it was found that AG treatment was limited to the surface structure and the hydrophobicity was insufficient (drop angle 115 ° or less), and the oil stain resistance was weak. In addition, the glass/composite board substrate for bonding the skin has weak hydrophilicity, the bonding force cannot be effectively improved, and the skin may be peeled off.
Based on this, this embodiment of the application provides a shell structure, including substrate and functional layer, the functional layer sets up in one side of substrate, and wherein, the surface of substrate towards functional layer one side forms super hydrophilic surface structure, and this super hydrophilic surface structure is a plurality of bellying of array arrangement through femtosecond laser radium carving technology formation. Because the super-hydrophilic surface structure is a plurality of protruding parts arranged in an array, better hydrophobic effect (more than 130 degrees of static contact angle) can be obtained when the super-hydrophilic surface structure is subjected to hydrophobic treatment, the degree of greasy dirt contamination is weakened, and better hydrophilic effect (less than 20 degrees of static contact angle) can be obtained when the super-hydrophilic surface structure is subjected to hydrophilic treatment, so that the bonding strength is improved.
The specific structure of the housing structure and the manufacturing process thereof are described in detail below in connection with the electronic device.
First, a specific structure of the housing structure will be described.
Referring to fig. 4, fig. 5 and fig. 6, fig. 4 is a film layer diagram of a shell structure provided in an embodiment of the present application, fig. 5 is a schematic structural diagram of a substrate provided in an embodiment of the present application, fig. 6 is a partial perspective view of a first surface provided in an embodiment of the present application, where fig. 5 (1) is a schematic front structural diagram of the substrate, and fig. 5 (2) is a cross-sectional view of fig. 5 (1) along the AA' direction. As shown in fig. 4, 5 and 6, the housing structure 10 includes a substrate 101, where the substrate 101 includes a metal substrate, a glass fiber board substrate, a composite board substrate, an injection molding substrate, and the like, and specific materials of the substrate 101 are not limited in this embodiment. The substrate 101 includes a first surface 1011 and a second surface 1012 opposite to each other, and when the first surface 1011 is subjected to laser etching by a femtosecond laser, a plurality of M rows and N columns of uniformly distributed protrusions 10111 can be formed on the first surface 1011, where M is a positive integer greater than or equal to 1, and N is a positive integer greater than or equal to 1.
As can be seen from the foregoing, the housing structure 10 may be a single housing structure such as a glass housing, a plastic housing or a metal housing, a housing formed by splicing a base material such as metal, glass fiber plates, a composite plate, an injection molding piece and a plain skin, or a housing formed by splicing four materials such as metal, glass, plain skin and a composite plate.
Thus, with continued reference to fig. 4, 5 and 6, when the housing structure 10 is a housing formed by joining a substrate such as metal, glass fiber board, composite board, injection molding, etc. and a skin, or the housing structure 10 is a housing formed by joining four materials such as metal, glass, skin, and composite board, the first surface 1011 may include a first functional region 1011a and a second functional region 1012b. A first functional layer 1021 is disposed on the first functional region 1011a of the first surface 1011, wherein the first functional layer 1021 may be a hydrophobic layer 1021; the second functional layer 1022 is disposed on the second functional area 1012b of the first surface 1011, where the second functional layer 1022 may be a skin, and the skin may be disposed on the second functional area 1012b of the first surface 1011 by an adhesive, for example.
For example, when the first functional layer 1021 is a hydrophobic layer 1021, for example, a perfluoropolyether or silane material may be used for baking or deposition to form the hydrophobic layer 1021 on the first functional region 1011a of the first surface 1011. Since the first surface 1011 is provided with the plurality of protrusions 10111 which are uniformly distributed and have a large number, when the first functional region 1011a of the first surface 1011 is provided with the hydrophobic material such as perfluoropolyether or silane, the surface area of the material such as perfluoropolyether or silane is increased, so that the area of the material such as perfluoropolyether or silane is increased and the distribution is uniform, i.e., more materials such as perfluoropolyether or silane can be spread on a larger bearing surface and the distribution of the material such as perfluoropolyether or silane is uniform. In this way, when a hydrophobic substance such as perfluoropolyether or silane is provided, the hydrophobic substance such as perfluoropolyether or silane is unevenly distributed, as compared with the hydrophobic layer formed after the AG process treatment, because the structure on the surface treated by the AG process is a random structure, the hydrophobic layer formed here is insufficient in hydrophobicity (the water drop angle is 115 ° or less). In this embodiment of the present application, the hydrophobic layer formed on the plurality of evenly arranged protruding portions 10111 may obtain a higher water drop angle, for example, the water drop angle may be increased from 115 ° to 140 °, the hydrophobic effect is better, even reach super-hydrophobic, and the degree of oil contamination is weakened.
For example, when the second functional layer 1022 is a green sheet, since the first surface 1011 forms a super-hydrophilic surface structure by a femtosecond laser etching process, wherein the static contact angle of the surface of the substrate 101 should be less than 20 ° (as shown in fig. 7), when the green sheet is bonded to the substrate 101 by using an adhesive such as an acrylic pressure sensitive adhesive or a hot melt adhesive film, the bonding strength can be increased, and the problem of peeling between the substrate 101 and the green sheet when the force between the substrate 101 and the green Pi Nianjie is insufficient can be avoided.
That is, in the embodiment of the present application, the shell structure 10 formed by splicing not only can improve the adhesion between the substrate and the skin, but also can reduce the degree of contamination of greasy dirt.
When the housing structure 10 is a single housing structure such as a glass housing, a plastic housing, or a metal housing, referring to fig. 8, fig. 8 is a film layer diagram of another housing structure according to an embodiment of the present application. As shown in fig. 8, a third functional layer 1023 is disposed on the entire area of the first surface 1011, wherein the third functional layer 1023 may be a hydrophobic layer or a skin.
Illustratively, when third functional layer 1023 is a hydrophobic layer, it may be baked or deposited, for example, with a perfluoropolyether or silane species, to form a hydrophobic layer of first surface 1011. Since the first surface 1011 is provided with the plurality of protrusions 10111 which are uniformly distributed and have a large number, when the first surface 1011 is provided with the hydrophobic material such as perfluoropolyether or silane, the surface area of the material such as perfluoropolyether or silane is increased, so that the area of the material such as perfluoropolyether or silane is increased, and the distribution is uniform, i.e. more materials such as perfluoropolyether or silane can be laid on a larger bearing surface, and the distribution of the materials such as perfluoropolyether or silane is uniform. In this way, when a hydrophobic substance such as perfluoropolyether or silane is provided, the hydrophobic substance such as perfluoropolyether or silane is unevenly distributed, as compared with the hydrophobic layer formed after the AG process treatment, because the structure on the surface treated by the AG process is a random structure, the hydrophobic layer formed here is insufficient in hydrophobicity (the water drop angle is 115 ° or less). In this embodiment of the present application, the hydrophobic layer formed on the plurality of evenly arranged protruding portions 10111 may obtain a higher water drop angle, for example, the water drop angle may be increased from 115 ° to 140 °, the hydrophobic effect is better, even reach super-hydrophobic, and the degree of oil contamination is weakened.
For example, when the third functional layer 1023 is a green sheet, since the first surface 1011 forms a super-hydrophilic surface structure by a femtosecond laser etching process, wherein the static contact angle of the surface of the substrate 101 should be less than 20 °, when the green sheet is bonded to the substrate 101 by using an adhesive such as an acrylic pressure sensitive adhesive or a hot melt adhesive film, the bonding strength can be increased, and the problem of peeling between the substrate 101 and the green sheet when the force between the substrate 101 and the green Pi Nianjie is insufficient is avoided.
As for the shape of the boss 10111, the shape of the boss 10111 is not limited in the embodiment of the present application, and may be set by those skilled in the art according to actual situations.
In one possible implementation, with continued reference to fig. 5 and 6, the boss 10111 is a prism.
When the boss 10111 is a prism, the abrasion resistance of the case structure 10 can be improved.
It should be noted that fig. 5 and 6 illustrate a quadrangular prism, but do not limit the present application, and in other alternative embodiments of the present application, the boss 10111 may be a pentagonal prism (not shown in the drawings) or a hexagonal prism (as shown in fig. 9), etc.
In yet another possible implementation, referring to fig. 10, fig. 10 is a schematic front view of another substrate according to an embodiment of the present application. As shown in fig. 10, the boss 10111 is a rectangular parallelepiped.
Illustratively, the first surface 1011 includes a first edge 1011a and a second edge 1011b disposed opposite in the first direction X, and a third edge 1011c and a fourth edge 1011d disposed opposite in the second direction Y. The plurality of protrusions 10111 are arranged from the third edge 1011c to the fourth edge 1011d, and each protrusion 10111 extends from the first edge 1011a to the second edge 1011b, the first direction X being perpendicular to the second direction Y.
In yet another possible implementation, referring to fig. 11, fig. 11 is a schematic front view of another substrate according to an embodiment of the present application. As shown in fig. 11, the boss 10111 is cylindrical.
In still another possible implementation manner, referring to fig. 12, fig. 12 is a schematic perspective view of a boss provided in an embodiment of the present application. As shown in fig. 12, the boss 10111 is a cone.
With respect to the size of the bump structure 10111, the size of the bump 10111 is not limited in the embodiments of the present application, and may be set by those skilled in the art according to practical situations.
In one possible implementation, with continued reference to FIG. 5,2 μm.ltoreq.H2.ltoreq.50μm, and 2 μm.ltoreq.H2.ltoreq.50μm, where H1 is the side length of the boss 10111, H2 is the distance between two adjacent bosses 10111, and H3 is the height of the boss 10111.
Exemplary H1 is 2 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, etc. H2 is 2 μm, 10 μm, 20 μm, 30 μm, 40 μm or 50 μm, etc. H3 is 2 μm, 10 μm, 20 μm, 30 μm, 40 μm or 50 μm, etc.
By this arrangement, the problem of poor abrasion resistance of the housing structure when H1, H2 and/or H3 is too large and poor water repellency when H1, H2 and/or H3 is too small can be avoided.
The H1, H2, and H3 may be all the same or all different, or two of them may be the same, and any relationship may be satisfied between H1, H2, and H3. Illustratively, when the shape of the boss includes a cuboid or prism, the side length of the boss and the distance between two adjacent bosses satisfy: H1/H2 is more than or equal to 0.9 and less than or equal to 1.1. Illustratively, H1/H2 is equal to 1, 0.9, 1.1, or the like.
It will be appreciated that the above dimensions and shapes may be set for parameters used in laser engraving the substrate surface using a femtosecond laser to form the desired dimensions and shapes.
The above description is given of the structure of the housing structure 10, and the following description is given of the manufacturing process of the housing structure with reference to the housing structure shown in fig. 4. Since the manufacturing method of the housing structure can be used for manufacturing the housing structure described above, for example, it has the same advantageous effects as the housing structure, and reference is made to the embodiment of the housing structure described above for details which are not described in detail in this embodiment.
Referring to fig. 13, fig. 13 is a flowchart of a method for manufacturing a shell structure according to an embodiment of the present application, and as shown in fig. 13, the steps of the method for manufacturing a shell structure according to the embodiment of the present application specifically include:
s101, providing a substrate 101, wherein the substrate 101 comprises a first surface 1011 and a second surface 1012 opposite to each other.
The substrate 101 includes a metal substrate, a glass fiber board substrate, a composite board substrate, an injection molding substrate, etc., and the specific materials of the substrate 101 are not limited in this embodiment.
S102, forming a plurality of M rows and N columns of protrusions 10111 on the first surface 1011 of the substrate 101 by a femtosecond laser etching process, wherein the first surface 1011 may include a first functional region 1011a and a second functional region 1012b.
The first surface 1011 of the substrate 101 is formed with a plurality of M rows and N columns of protrusions 10111 by a femtosecond laser etching process, where M is a positive integer greater than or equal to 1 and N is a positive integer greater than or equal to 1. Specific values of M and N are not limiting in the examples herein.
With reference to fig. 14, fig. 14 is a typical morphology and dimension diagram of a first surface subjected to femtosecond laser etching according to an embodiment of the present application, where fig. 14 (1) is a morphology diagram and fig. 14 (2) is a dimension diagram. Fig. 14 is merely an example, and does not limit the present application.
The first surface 1011 may include different functional regions, such as a first functional region 1011a and a second functional region 1012b, such that different functional layers may be formed in the different regions.
It is understood that the first surface 1011 may not be divided into regions, and thus, the entire region of the first surface 1011 may be provided with a functional layer.
S103, performing dip-baking or deposition on the first functional region 1011a of the first surface 1011 by using a substance such as perfluoropolyether or silane to form a hydrophobic layer 1021 on the first functional region 1011a of the first surface 1011.
Since the first surface 1011 is provided with the plurality of protrusions 10111 which are uniformly distributed and have a large number, when the first functional region 1011a of the first surface 1011 is provided with the hydrophobic material such as perfluoropolyether or silane, the surface area of the material such as perfluoropolyether or silane is increased, so that the area of the material such as perfluoropolyether or silane is increased and the distribution is uniform, i.e., more materials such as perfluoropolyether or silane can be spread on a larger bearing surface and the distribution of the material such as perfluoropolyether or silane is uniform. Thus, since the structure on the surface treated by the AG process is a random structure, the hydrophobicity of the hydrophobic layer formed here is insufficient (the water drop angle is 115 ° or less) compared to the hydrophobic layer formed after the treatment by the AG process. In this embodiment of the present application, the hydrophobic layer formed on the plurality of evenly arranged protruding portions 10111 may obtain a higher water drop angle, for example, the water drop angle may be increased from 115 ° to 140 °, the hydrophobic effect is better, even reach super-hydrophobic, and the degree of oil contamination is weakened.
And S104, arranging the element skin on the second functional area 1012b of the first surface 1011 through adhesive glue.
When the skin is disposed in the second functional area 1012b of the first surface 1011, the first surface 1011 forms a super-hydrophilic surface structure by the femtosecond laser etching process, wherein the static contact angle of the surface of the substrate 101 should be less than 20 ° (as shown in fig. 7), so that when the skin is bonded to the substrate 101 by using an adhesive such as an acrylic pressure sensitive adhesive or a hot melt adhesive, the bonding strength can be increased, and the problem of peeling between the substrate 101 and the skin when the force between the substrate 101 and the skin Pi Nianjie is insufficient is avoided.
The shell structure prepared by the preparation method of the shell structure has the double characteristics of better hydrophobic effect (static contact angle is more than 130 degrees), reduced degree of greasy dirt contamination, and better hydrophilic effect (static contact angle is less than 20 degrees) when hydrophilic treatment is carried out on the super-hydrophilic surface structure, so that the bonding strength is improved.
The following describes the beneficial effects produced by the housing structure provided in the embodiments of the present application in connection with experiments. Among them, description will be made taking a substrate as a glass substrate as an example.
Referring to fig. 15 to 19, fig. 15 to 18 respectively show the topography of the plurality of protrusions 10111 formed on the first surface 1011 of the substrate 101 in M rows and N columns by the femtosecond laser engraving process, wherein fig. 15 (1) is a topography of the plurality of protrusions 10111 when the protrusions 10111 are 5 μm, fig. 15 (2) is a characterization of the static contact angle of the first surface 1011 when the protrusions 10111 are 5 μm, and fig. 15 (3) is a characterization of the static contact angle of the first surface 1011 after the Anti-fingerprint film (AF) is disposed when the protrusions 10111 are 5 μm, that is, after the hydrophobic layer is disposed; fig. 16 (1) is a topography of the plurality of protrusions 10111 when the protrusions 10111 are 10 μm, and fig. 16 (2) is a representation of the static contact angle of the first surface 1011 after the Anti-fingerprint (AF) is provided, i.e., after the hydrophobic layer is provided, when the protrusions 10111 are 10 μm; fig. 17 (1) is a topography of the plurality of protrusions 10111 when the protrusions 10111 are 15 μm, and fig. 17 (2) is a representation of the static contact angle of the first surface 1011 after the Anti-fingerprint (AF) is provided, i.e., after the hydrophobic layer is provided, when the protrusions 10111 are 15 μm; fig. 18 (1) is a topography of the plurality of protrusions 10111 when the protrusions 10111 are 20 μm, and fig. 18 (2) is a representation of the static contact angle of the first surface 1011 after the Anti-fingerprint (AF) is provided, i.e., after the hydrophobic layer is provided, when the protrusions 10111 are 20 μm. Fig. 19 shows a trend of the surface roughness, static contact angle and static contact angle of the first surface 1011 after the femtosecond laser treatment of the convex portion 10111 at different heights, wherein the abscissa in fig. 19 is the height of the surface micro-pillars (5 μm, 10 μm, 15 μm and 20 μm, respectively), the ordinate on the left represents the water drop angle in degrees, the ordinate on the right represents the roughness in μm, the left histogram in fig. 19 represents the static contact angle of the first surface 1011 after the femtosecond laser treatment, and the right histogram represents the static contact angle after the AF coating.
As can be seen from fig. 15 to 19, the height of the protrusion 10111 is raised from 5 μm to 20 μm, and when the depth of the laser engraving microcolumn is 5 μm, the surface roughness of the first surface 1011 is 1.59 μm, and the static contact angle is 4 °; when the height of the boss 10111 is raised to 10 μm, the surface roughness of the first surface 1011 may be raised to 3.15 μm and the static contact angle reduced to 1 °. When the height of the boss 10111 is raised to 15 μm, the surface roughness of the first surface 1011 may be raised to 3.68 μm and the static contact angle reduced to 1 °. When the height of the boss 10111 is raised to 20 μm, the surface roughness of the first surface 1011 may be raised to 4.23 μm and the static contact angle reduced to 0 °. After AF coating is performed on the first surface 1011 after femto-second laser treatment, the maximum static water contact angle may rise from 130 ° to 140 ° (136 °, 134 °, 139 ° and 140 °, respectively) as the height of the protruding portion 10111 rises, that is, as the height of the protruding portion 10111 rises, the roughness shows a decreasing trend, the water contact angle of the first surface 1011 after laser etching shows a decreasing trend, and the static contact angle after AF coating shows a rising trend.
From this, it can be derived that the shell structure that this application embodiment provided has better hydrophobic effect (static contact angle more than 130), weakens the degree that greasy dirt was stained with to and when carrying out hydrophilic treatment on super hydrophilic surface structure, can obtain better hydrophilic effect (static contact angle less than 20) to improve bonding strength's dual characteristics.
The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (16)
1. A housing structure, comprising:
a substrate comprising a first surface and a second surface opposite to each other, wherein the first surface is provided with a plurality of M rows and N columns of convex parts, M is a positive integer greater than or equal to 1, N is a positive integer greater than or equal to 1, and the first surface comprises at least one functional area;
the functional layer is positioned on one side of the first surface, which is away from the second surface, and is arranged on the functional area of the first surface.
2. The housing structure of claim 1 wherein the first surface comprises a first functional area and a second functional area, the functional layer comprising a first functional layer and a second functional layer;
the first functional layer is arranged on the first functional area of the first surface, and the second functional layer is arranged on the second functional area of the first surface.
3. The housing structure of claim 2 wherein the first functional layer comprises a hydrophobic layer.
4. A housing structure according to claim 3, wherein the material of the hydrophobic layer comprises a perfluoropolyether or a silane-based substance.
5. The housing structure of any one of claims 2-4 wherein the second functional layer comprises a plain skin.
6. The housing structure of any one of claims 1-5 wherein the shape of the boss comprises a cuboid, prism, cone or cylinder.
7. The housing structure of claim 6, wherein when the shape of the boss comprises a rectangular parallelepiped or a prismatic body, a side length of the boss and a distance between adjacent two of the bosses satisfy:
0.9≤H1/H2≤1.1；
wherein H1 is the side length of the protruding parts, and H2 is the distance between two adjacent protruding parts.
8. The housing structure according to any one of claims 1 to 7, wherein 2 μm.ltoreq.H1.ltoreq.50 μm,2 μm.ltoreq.H2.ltoreq.50 μm, and 2 μm.ltoreq.H3.ltoreq.50 μm,
wherein H3 is the height of the protruding part.
9. The housing structure of any one of claims 1-8 wherein the substrate comprises metal, glass, fiberglass board, composite board, or injection molded part.
10. The housing structure of any one of claims 1-9 wherein the static contact angle of the first surface of the substrate is less than or equal to 20 °.
11. The housing structure of claim 10 wherein the functional layer is a hydrophobic layer having a static contact angle greater than or equal to 130 °.
12. An electronic device comprising the housing structure of any one of claims 1-11.
13. A method of manufacturing a shell structure, characterized by being used for manufacturing a shell structure according to any one of claims 1-11;
the preparation method of the shell structure comprises the following steps:
providing a substrate, wherein the substrate comprises a first surface and a second surface which are opposite;
carrying out laser etching on the first surface by using femtosecond laser to form a plurality of M rows and N columns of convex parts, wherein M is a positive integer greater than or equal to 1, N is a positive integer greater than or equal to 1, and the first surface comprises at least one functional area;
a functional layer is disposed on the functional area of the first surface.
14. The method of manufacturing a shell structure according to claim 13, wherein the first surface comprises a first functional area and a second functional area;
providing a functional layer on the functional area of the first surface, comprising:
providing a first functional layer on the first functional region of the first surface;
a second functional layer is disposed on the second functional region of the first surface.
15. The method of manufacturing a shell structure according to claim 14, wherein the first functional layer comprises a hydrophobic layer;
disposing a first functional layer on the first functional region of the first surface, comprising:
baking or depositing with perfluoropolyether or silane on the first functional region of the first surface, forming the hydrophobic layer on the first functional region of the first surface.
16. The method of claim 14, wherein the second functional layer comprises a skin;
providing a second functional layer on the second functional region of the first surface, comprising:
treating the second functional region on the first surface with a hydrophilic surface chemical modifier;
and arranging the plain skin in the second functional area of the first surface through adhesive glue.
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| CN202311664628.7A CN117794119A (en) | 2023-12-04 | 2023-12-04 | Shell structure, manufacturing method thereof and electronic equipment |
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