CN108277463B - Glass rear cover and preparation method thereof - Google Patents
Glass rear cover and preparation method thereof Download PDFInfo
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- CN108277463B CN108277463B CN201810089936.4A CN201810089936A CN108277463B CN 108277463 B CN108277463 B CN 108277463B CN 201810089936 A CN201810089936 A CN 201810089936A CN 108277463 B CN108277463 B CN 108277463B
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- coating layer
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- 239000011521 glass Substances 0.000 title claims abstract description 137
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000010410 layer Substances 0.000 claims abstract description 105
- 239000011247 coating layer Substances 0.000 claims abstract description 51
- 239000007888 film coating Substances 0.000 claims abstract description 27
- 238000009501 film coating Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000007747 plating Methods 0.000 claims abstract description 16
- 239000003086 colorant Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 28
- 238000000576 coating method Methods 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 25
- 239000012528 membrane Substances 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims description 10
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 230000031700 light absorption Effects 0.000 claims description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 9
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052681 coesite Inorganic materials 0.000 claims description 8
- 229910052906 cristobalite Inorganic materials 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 238000004544 sputter deposition Methods 0.000 claims description 8
- 229910052682 stishovite Inorganic materials 0.000 claims description 8
- 229910052905 tridymite Inorganic materials 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000007781 pre-processing Methods 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- -1 polyethylene terephthalate Polymers 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 239000011358 absorbing material Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 238000009826 distribution Methods 0.000 description 4
- 238000005240 physical vapour deposition Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013003 hot bending Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012811 non-conductive material Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229910005091 Si3N Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0015—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterized by the colour of the layer
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/083—Oxides of refractory metals or yttrium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/10—Glass or silica
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/18—Metallic material, boron or silicon on other inorganic substrates
- C23C14/185—Metallic material, boron or silicon on other inorganic substrates by cathodic sputtering
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/46—Sputtering by ion beam produced by an external ion source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Signal Processing (AREA)
- Surface Treatment Of Glass (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a glass rear cover which comprises a 3D glass plate, a coating layer connected with the 3D glass plate and a shielding layer connected with one side of the coating layer, which is far away from the 3D glass plate, wherein the size of the 3D glass plate is matched with that of a mobile terminal rear cover, the coating layer comprises a plurality of layers of light-transmitting medium layers, and the shielding layer is made of a non-conductive light-absorbing material. The invention also provides a preparation method of the glass rear cover, which comprises the following steps: providing a shaped 3D glass sheet; plating a coating layer on the inner surface of the 3D glass plate; plating a shielding layer on one side of the film coating layer, which is far away from the 3D glass plate; and obtaining a finished product of the glass rear cover, wherein the finished product can present colors. The glass rear cover and the preparation method thereof provided by the invention have the advantages of simple process, high product yield, energy conservation and environmental protection.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of glass product decoration processes, in particular to a glass rear cover and a preparation method of the glass rear cover.
[ background of the invention ]
The 5G technology is gradually developed, and with the arrival of the 5G era, the wireless frequency band will be more and more complex, and the requirement for signals is higher and higher. The mobile phone antenna is generally arranged on the back of the mobile phone, and the traditional metal shell has the defect of shielding mobile phone signals, so that the mobile phone is required to avoid using a metal rear cover as much as possible for protecting the signals, and glass becomes the best choice.
In the related technology, the mobile phone rear cover is made of 3D glass, a coating layer is arranged on the glass, the coating layer generates light wave interference to obtain a colorful effect, and an opaque ink layer is arranged on the surface of the coating layer to achieve an ideal shielding effect.
However, the ink essentially contains resin materials, is poor in weather resistance and easy to discolor, and also does not accord with the concept of environmental protection, and the scheme has the disadvantages of complex implementation process and high cost.
Therefore, there is a need to provide a new glass rear cover and a method for manufacturing the same to solve the above-mentioned problems.
[ summary of the invention ]
The invention aims to provide a glass rear cover with simple process and good performance and a preparation method of the glass rear cover.
In order to achieve the above object, the present invention provides a glass rear cover, which includes a 3D glass plate having an inner surface, a shielding layer completely covering the inner surface and made of a non-conductive light absorbing material, and a coating layer sandwiched between the 3D glass plate and the shielding layer, wherein two sides of the coating layer are respectively connected to the 3D glass plate and the shielding layer, the size of the 3D glass plate is matched with the size of the rear cover of a mobile terminal, the inner surface is a surface close to an internal element of the mobile terminal, the size of the coating layer is the same as the size of the shielding layer, and the coating layer includes multiple layers of transparent dielectric layers.
Preferably, the thickness of the coating layer is 100-500 nm, and the material of the dielectric layer comprises one or more of SiO2, Al2O3, TiO2, Nb2O5 and Si3N 4.
Preferably, the coating layer comprises Nb2O5 dielectric layers and SiO2 dielectric layers which are alternately coated in sequence.
Preferably, the thickness of the shielding layer is 200-1000 nm, and the material of the shielding layer is selected from one or more of silicon, silicon carbide and hydrogen-containing diamond.
Preferably, the glass rear cover further comprises an explosion-proof film, two sides of the explosion-proof film are respectively connected with the 3D glass and the film coating layer, and the explosion-proof film is made of a PET resin material.
Preferably, the middle and the edge of the 3D glass plate are both designed in an arc shape.
The invention also provides a preparation method of the glass rear cover, which comprises the following steps:
the method comprises the following steps: the method comprises the following steps of preprocessing, providing a formed 3D glass plate, carrying out ultrasonic cleaning on the inner surface of the 3D glass plate and drying, wherein the size of the 3D glass plate is matched with that of a rear cover of the mobile terminal;
step two: plating a coating layer on the inner surface of the 3D glass plate, wherein the coating layer comprises a plurality of light-transmitting medium layers;
step three: plating a shielding layer, wherein the shielding layer is plated on one surface of the film coating layer, which is far away from the 3D glass plate, and the shielding layer is made of a non-conductive light absorption material;
step four: and obtaining a finished product of the glass rear cover, wherein the finished product can present colors.
Preferably, the coating layer is plated by a sputtering coating technology or a plasma-assisted coating technology.
Preferably, the shielding layer is plated by a sputtering coating technology or a plasma-assisted coating technology.
The invention also provides a preparation method of the glass rear cover, which comprises the following steps:
the method comprises the following steps: feeding, namely providing an explosion-proof membrane, and carrying out ultrasonic cleaning and drying on the explosion-proof membrane, wherein the explosion-proof membrane is made of a PET (polyethylene terephthalate) resin material;
step two: plating a film coating layer on the surface of the explosion-proof film, wherein the film coating layer comprises a plurality of layers of light-transmitting medium layers;
step three: plating a shielding layer, wherein the side of the film coating layer, which is far away from the explosion-proof film, is plated with the shielding layer, and the shielding layer is made of a non-conductive light absorption material;
step four: the method comprises the following steps of preprocessing, providing a formed 3D glass plate, carrying out ultrasonic cleaning on the 3D glass plate and drying the 3D glass plate, wherein the size of the 3D glass plate is matched with that of a rear cover of the mobile terminal;
step five: and (3) attaching, namely attaching one side of the explosion-proof film, which is far away from the coating layer, to the inner surface of the 3D glass to obtain a finished product of the glass rear cover, wherein the finished product can present colors.
Compared with the prior art, the glass rear cover and the preparation method thereof have the advantages that the coating layer is adopted to achieve the effect of having colors, the shielding layer is adopted to achieve the shielding purpose, and the coating layer and the shielding layer are made of non-conductive materials and do not affect the performance of the mobile terminal antenna; the coating layer and the shielding layer are plated by a sputtering coating technology and/or a plasma auxiliary coating technology, so that the process is simple, the cost is saved, and the product yield is high; in addition, an ink coating is not needed, the influence of the ink on the color effect of the finished product of the glass rear cover is eliminated, the color mixing and the color stability of Physical Vapor Deposition (PVD) are facilitated, and the energy conservation and the environmental protection are realized.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is an exploded view of a glass rear cover according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a glass rear cover according to a first embodiment of the present invention;
FIG. 3 is a spectrum of a glass back cover according to one embodiment of the present invention;
FIG. 4 is a spectrum of a glass back cover according to a second embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a glass rear cover according to a third embodiment of the present invention;
FIG. 6 is a flow chart of a method of manufacturing a glass rear cover according to a fourth embodiment of the present invention;
FIG. 7 is a flow chart of a method of manufacturing a glass rear cover according to a fifth embodiment of the present invention;
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 and 2, the present invention provides a glass rear cover 100, which includes a 3D glass plate 1, a film coating layer 2 connected to the 3D glass plate 1, and a shielding layer 3 connected to a side of the film coating layer 2 away from the 3D glass plate 1.
The 3D glass plate 1 is made by adopting a hot bending process on the basis of the traditional 2D glass, the middle and the edge of the 3D glass plate are designed in an arc shape, and the 3D glass plate is the only hard substance which can be well attached to a curved screen, is light, thin, clean, anti-glare, good in weather resistance and the like. The size of 3D glass board 1 and the size phase-match of lid behind the mobile terminal, 3D glass board 1 includes internal surface 11, internal surface 11 is the one side that is close to the mobile terminal internal component.
In this embodiment, the coating layer 2 is directly coated on the inner surface 11 and completely covers the inner surface 11, the coating layer 2 includes a plurality of transparent dielectric layers 21, the coating layer 2 is used for displaying colors, specifically, the plurality of dielectric layers 21 generate light wave interference to obtain various colors, the dielectric layers 21 have different thicknesses and different material types, and the coating layer 2 has different colors.
Preferably, the thickness of the coating layer 2 is 100-500 nm, and the material of the dielectric layer comprises SiO2、Al2O3、TiO2、Nb2O5、Si3N4One or more of (a).
The shielding layer 3 is made of a non-conductive light absorption material, is plated on one side of the coating layer 2 far away from the 3D glass plate 1, and completely covers the coating layer 2. The shielding layer 3 is used for shielding light from the interior of the mobile terminal, so that an ideal shielding effect is achieved, and the requirement of later-stage mobile terminal assembly is met. Preferably, the thickness of the shielding layer 3 is 200-1000 nm, the material is selected from one or more of silicon, silicon carbide and hydrogen-containing diamond, and the shielding layer is stable in chemical property and not easy to fall off.
Specifically, the present embodiment provides a glass rear cover 100, whose coating structure distribution is shown in table 1:
TABLE 1 coating film structure distribution table of glass rear cover
Referring to fig. 3, the color of the glass rear cover 100 is blue, and the characteristics thereof are shown in table 2:
TABLE 2 finished product Property Table of glass rear cover
| L* | 70.1 |
| a* | -6.9 |
| b* | -45.2 |
| Average light transmittance (%) | 55.8 |
| Average reflectance (%) | 2.9 |
| Resistivity (omega/□) | 10E10 |
Example two
The technical features of the present embodiment are different from those of the first embodiment: the present embodiment provides a glass rear cover 200, the distribution of the coating structure is shown in table 3:
TABLE 3 coating film structure distribution table of glass rear cover
Referring to fig. 4, the color of the glass rear cover 200 is red, and the characteristics thereof are shown in table 4:
TABLE 4 finished product Property Table of glass rear cover
| L* | 72.2 |
| a* | 45.4 |
| b* | -2.9 |
| Average light transmittance (%) | 57.2 |
| Average reflectance (%) | 1.4 |
| Resistivity (omega/□) | 10E10 |
EXAMPLE III
Referring to fig. 5, the present invention provides a glass rear cover 300, which includes a 3D glass plate 10, an explosion-proof film 20 connected to the glass plate 10, a film coating layer 30 connected to a side of the explosion-proof film away from the 3D glass plate, and a shielding layer 40 connected to a side of the film coating layer 30 away from the explosion-proof film 20.
The 3D glass plate 10 is made by adopting a hot bending process on the basis of the traditional 2D glass, the middle and the edge of the 3D glass plate are designed in an arc shape, and the 3D glass plate is the only hard substance which can be well attached to a curved screen, is light, thin, clean, anti-glare, good in weather resistance and the like. The size of the 3D glass plate 10 is matched with that of the rear cover of the mobile terminal, and the 3D glass plate 10 comprises an inner surface which is one surface close to the internal elements of the mobile terminal.
The explosion-proof membrane 20 is attached to the inner surface of the 3D glass plate, the explosion-proof membrane 20 is made of a PET resin material, the surface is smooth and glossy, subsequent film coating operation is easy to realize, in addition, the explosion-proof membrane 20 has excellent physical and mechanical properties within a wide temperature range, the long-term use temperature can reach 120 ℃, and the creep resistance, the fatigue resistance, the friction resistance and the dimensional stability are good.
The coating layer 30 is directly plated on one surface, far away from the 3D glass plate 10, of the explosion-proof membrane 20 and completely covers the explosion-proof membrane 20, the coating layer 30 comprises multiple layers of light-transmitting medium layers 301, the coating layer 30 is used for displaying colors, specifically, the multiple layers of medium layers 301 generate light wave interference and can obtain various colors, the thickness and the types of materials of the medium layers 301 are different, and the colors displayed by the coating layer 30 are different.
Preferably, the thickness of the coating layer 30 is 100-500 nm, and the material of the dielectric layer 301 comprises SiO2、Al2O3、TiO2、Nb2O5、Si3N4One or more of (a).
The shielding layer 40 is made of a non-conductive light absorption material and is used for shielding light from the inside of the mobile terminal, so that the requirement of later-stage mobile terminal assembly is met. Preferably, the thickness of the shielding layer 40 is 200 to 1000nm, and the material is selected from one or more of silicon, silicon carbide and hydrogen-containing diamond. The shielding layer 40 can be directly plated on the surface of the coating layer 30 far away from the explosion-proof membrane 20, and completely covers the coating layer 30, namely, the shielding layer 40 directly faces to the internal elements of the mobile terminal, so that an ideal shielding effect is achieved. The mask 40 is made of silicon, silicon carbide or a hydrogen-containing diamond-like material, and is chemically stable and not easy to fall off.
The film coating layer 30 and the shielding layer 40 can be integrated with the explosion-proof membrane 20 into a whole, and one side of the explosion-proof membrane 20, which is far away from the film coating layer 30, is directly attached to the 3D glass plate, so that a finished product of the glass rear cover 300 is obtained.
Example four
Referring to fig. 6, the present embodiment provides a method for manufacturing a rear glass cover 100, which includes the following steps:
s1: and preprocessing, providing a molded 3D glass plate 1, and performing ultrasonic cleaning and drying on the inner surface 11 of the 3D glass plate, wherein the size of the 3D glass plate 1 is matched with that of a rear cover of the mobile terminal.
The performance of the inner surface 11 of the 3D glass plate 1 has a great influence on the quality of the coating film, and the inner surface 11 needs to be pretreated. The ultrasonic cleaning utilizes the direct and indirect action of the cavitation action, the acceleration action and the direct current action of the ultrasonic waves in the liquid on the liquid and dirt, so that the dirt layer is dispersed, emulsified and stripped to achieve the cleaning purpose. After the inner surface 11 is cleaned, the inner surface is dried by nitrogen to remove moisture on the inner surface, so that the subsequent coating of the coating is facilitated.
S2: and the coating layer 2 is coated on the inner surface 11 of the 3D glass plate 1, and the coating layer 2 comprises a plurality of layers of light-transmitting medium layers 21.
S3: plating a shielding layer 3, plating the shielding layer 3 on one surface of the film coating layer 2 far away from the 3D glass plate 1, wherein the shielding layer 3 is made of a non-conductive light absorption material;
the step S2 and the step S3 are both completed in a film coating machine, and the environment of the film coating machine is set as follows: 0.005 Pa. The preparation process of the glass rear cover 100 specifically comprises the following steps:
cleaning the 3D glass plate 1 obtained in the step S1 for 3min in a film coating machine, and adopting a sputtering film coating technology and/or a plasma auxiliary film coating technology to coat the 3D glass plateThe inner surface 11 of the glass plate is plated with Nb with certain thickness in turn2O5Dielectric layer and SiO2And finally plating a Si shielding layer.
Step S4: a finished product of the glass rear cover 100 is obtained, which can be colored.
The glass rear cover 100 appears blue in color.
EXAMPLE five
Referring to fig. 7, the present embodiment provides a method for manufacturing a rear glass cover 300, which includes the following steps:
s10: feeding, providing an explosion-proof membrane 20, carrying out ultrasonic cleaning on the explosion-proof membrane 20 and drying, wherein the explosion-proof membrane 20 is made of a PET resin material;
the explosion-proof membrane 20 is made of PET resin material, has smooth and glossy surface, is easy to realize subsequent film coating operation, has excellent physical and mechanical properties in a wider temperature range, can reach 120 ℃ after being used for a long time, and has good creep resistance, fatigue resistance, friction resistance and dimensional stability.
S20: the coating layer 30 is coated on the surface of the explosion-proof membrane 20, and the coating layer 30 comprises a plurality of light-transmitting medium layers 301;
s30: plating a shielding layer 40, plating the shielding layer 40 on one surface of the film coating layer 30 far away from the explosion-proof film 20, wherein the shielding layer 40 is made of a non-conductive light absorption material;
the step S20 and the step S30 are both completed in a film coating machine, and the environment of the film coating machine is set as follows: 0.005 Pa. The preparation process of the glass rear cover 300 specifically comprises the following steps:
washing the explosion-proof membrane 20 obtained in the step S10 with ions for 3min in a coating machine, and sequentially and alternately coating Nb on the surface of the explosion-proof membrane 20 by adopting a sputtering coating technology and/or a plasma auxiliary coating technology2O5Dielectric layer and SiO2And finally plating a Si shielding layer.
S40: preprocessing, providing a molded 3D glass plate 10, and performing ultrasonic cleaning and drying on the 3D glass plate 10, wherein the size of the 3D glass plate 10 is matched with that of a rear cover of the mobile terminal;
s50: and (3) attaching, namely attaching one side of the explosion-proof membrane 20, which is far away from the coating layer 30, to the inner surface of the 3D glass 10 to obtain a finished product of the glass rear cover 300, wherein the finished product can present colors.
In the step S50, the direct coating operation on the 3D glass plate 10 is avoided, the risk is reduced, and the success rate of the product is increased.
Compared with the prior art, the glass rear cover and the preparation method thereof have the advantages that the coating layer is adopted to achieve the effect of having colors, the shielding layer is adopted to achieve the shielding purpose, and the coating layer and the shielding layer are made of non-conductive materials and do not affect the performance of the mobile terminal antenna; the coating layer and the shielding layer are plated by a sputtering coating technology and/or a plasma auxiliary coating technology, so that the process is simple, the cost is saved, and the product yield is high; in addition, an ink coating is not needed, the influence of the ink on the color effect of the finished product of the glass rear cover is eliminated, the color mixing and the color stability of Physical Vapor Deposition (PVD) are facilitated, and the energy conservation and the environmental protection are realized.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A glass rear cover is suitable for a mobile terminal and is characterized by comprising a 3D glass plate, a shielding layer which covers the surface of the 3D glass plate and is made of a non-conductive light absorption material, and coating layers which are clamped between the 3D glass plate and the shielding layer and two sides of which are respectively connected with the 3D glass plate and the shielding layer, wherein the size of the 3D glass plate is matched with that of the mobile terminal rear cover; the size of the coating layer is the same as that of the shielding layer, and the coating layer comprises a plurality of layers of light-transmitting medium layers; the thickness of the shielding layer is 200-1000 nm, and the material of the shielding layer is selected from one or more of silicon, silicon carbide and hydrogen-containing diamond.
2. The glass rear cover of claim 1, wherein the shielding layer and the coating layer are disposed only on a side of the 3D glass plate adjacent to an internal component of the mobile terminal.
3. The glass rear cover according to claim 1, wherein the thickness of the coating layer is 100 to 500nm, and the material of the dielectric layer comprises SiO2、Al2O3、TiO2、Nb2O5、Si3N4One or more of (a).
4. The glass back cover of claim 3, wherein said coating comprises sequential alternating Nb coatings2O5Dielectric layer and SiO2A dielectric layer.
5. The glass rear cover according to claim 1, further comprising an explosion-proof film connected to the 3D glass and the coating layer at both sides, respectively, wherein the explosion-proof film is made of a PET resin material.
6. The glass rear cover according to claim 1, wherein the 3D glass plate is of an arc design in both the middle and the edges.
7. A method of manufacturing a glass rear cover according to any of claims 1 to 6, comprising the steps of:
the method comprises the following steps: the method comprises the following steps of preprocessing, providing a formed 3D glass plate, carrying out ultrasonic cleaning on the inner surface of the 3D glass plate and drying, wherein the size of the 3D glass plate is matched with that of a rear cover of the mobile terminal;
step two: plating a coating layer on the inner surface of the 3D glass plate, wherein the coating layer comprises a plurality of light-transmitting medium layers;
step three: plating a shielding layer, wherein the shielding layer is plated on one surface of the film coating layer, which is far away from the 3D glass plate, and the shielding layer is made of a non-conductive light absorption material;
step four: and obtaining a finished product of the glass rear cover, wherein the finished product can present colors.
8. The method of claim 7, wherein the coating is applied by a sputtering technique or a plasma-assisted coating technique.
9. The method of claim 7, wherein the shielding layer is deposited by a sputtering technique or a plasma-assisted deposition technique.
10. The preparation method of the glass rear cover is characterized by comprising the following steps of:
the method comprises the following steps: feeding, namely providing an explosion-proof membrane, and carrying out ultrasonic cleaning and drying on the explosion-proof membrane, wherein the explosion-proof membrane is made of a PET (polyethylene terephthalate) resin material;
step two: plating a film coating layer on the surface of the explosion-proof film, wherein the film coating layer comprises a plurality of layers of light-transmitting medium layers;
step three: plating a shielding layer, wherein the side of the film coating layer, which is far away from the explosion-proof film, is plated with the shielding layer, and the shielding layer is made of a non-conductive light absorption material;
step four: the method comprises the following steps of preprocessing, providing a formed 3D glass plate, carrying out ultrasonic cleaning on the 3D glass plate and drying the 3D glass plate, wherein the size of the 3D glass plate is matched with that of a rear cover of the mobile terminal;
step five: and (3) attaching, namely attaching one side of the explosion-proof film, which is far away from the coating layer, to the inner surface of the 3D glass to obtain a finished product of the glass rear cover, wherein the finished product can present colors.
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| CN110891380B (en) * | 2018-09-10 | 2022-03-18 | 北京小米移动软件有限公司 | Electronic equipment shell machining method and electronic equipment |
| CN110891379A (en) * | 2018-09-10 | 2020-03-17 | 北京小米移动软件有限公司 | Electronic equipment shell machining method and electronic equipment |
| CN109809706A (en) * | 2019-03-27 | 2019-05-28 | 深圳创维－Rgb电子有限公司 | The preparation method of 3D glass television base, TV and 3D glass television base |
| CN109991829B (en) * | 2019-05-08 | 2023-10-27 | 东莞得利钟表有限公司 | Self-cleaning superhard glass watch case and manufacturing method thereof |
| CN111099838A (en) * | 2019-12-30 | 2020-05-05 | 华为技术有限公司 | Curved glass cover plate and preparation method and terminal thereof |
| CN113365448B (en) * | 2020-03-04 | 2023-03-17 | Oppo广东移动通信有限公司 | Manufacturing method of shell assembly, shell assembly and electronic equipment |
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| CN103781296B (en) * | 2012-10-18 | 2018-02-06 | 深圳富泰宏精密工业有限公司 | Electronic device housing manufacture method |
| CN206292756U (en) * | 2016-12-23 | 2017-06-30 | 信利光电股份有限公司 | A kind of white or colored cover plate and display module |
| CN107056027B (en) * | 2017-03-06 | 2019-11-19 | 瑞声科技(新加坡)有限公司 | The processing method and electronic equipment of 3D glass product |
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