CN111180875A - Antenna diaphragm, rear shell, terminal, preparation method and application thereof - Google Patents
Antenna diaphragm, rear shell, terminal, preparation method and application thereof Download PDFInfo
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- CN111180875A CN111180875A CN201811347134.5A CN201811347134A CN111180875A CN 111180875 A CN111180875 A CN 111180875A CN 201811347134 A CN201811347134 A CN 201811347134A CN 111180875 A CN111180875 A CN 111180875A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
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- 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
Abstract
The invention relates to the field of communication antennas, and discloses an antenna diaphragm, a rear shell, a terminal and a preparation method of the rear shell of the terminal. The antenna diaphragm attached to the electronic product shell comprises a first diaphragm and a second diaphragm which are attached to each other, wherein the first diaphragm comprises a first base material and an antenna layer, the antenna layer is formed on one surface of the first base material, the other surface of the first base material is attached to the second diaphragm, the second diaphragm comprises a second base material, an adhesive layer and a decorative layer, the adhesive layer covers one surface of the second base material, the decorative layer is formed on the other surface of the second base material, and one side of the decorative layer of the second diaphragm is attached to the first diaphragm, and the thickness of the antenna layer is 5-30 mu m. According to the invention. The antenna diaphragm can reduce the influence area of the back mark when being attached to the shell of an electronic product and has excellent antenna adhesive force.
Description
Technical Field
The invention relates to the field of communication antennas, in particular to an antenna diaphragm, a rear shell, a terminal and a preparation method of the rear shell of the terminal.
Background
In recent years, a metal middle frame and a metal rear shell are used as a part of an antenna to design the antenna, the 4.5G |5G era comes, particularly, a new requirement is provided for the signal transmission capability of a shell by the application of a high-frequency band above 6GHz, and the metal rear shell can seriously influence the signal transmission according to the technical requirement of wireless transmission of the 5G era, so that the metal rear shell can be replaced by non-metal materials such as plastic, glass and ceramic, wherein the glass scheme is the most mainstream scheme. Meanwhile, the number of antennas is greatly increased due to the arrival of the 5G era, the position requirement is increased, the internal space of the existing metal mobile phone is small, and great difficulty is brought to the design of the antennas.
CN107248618A (application No. 201710283861.9) discloses a decorative film attached to a transparent member (glass layer), the decorative film includes an adhesive layer, a substrate (equivalent to a PET film layer) and a conductive layer (equivalent to an antenna layer), the substrate includes a first side and a second side which are oppositely disposed, the adhesive layer is located on the first side and used for attaching the decorative film to the surface of the transparent member, and the conductive layer is located on the second side and is an antenna. The disadvantages of this technique are: the antenna is formed by directly printing conductive ink on the decorative membrane and then baking and drying, and the antenna can affect the appearance of the original decorative membrane.
Disclosure of Invention
According to the first aspect of the present invention, an antenna film with excellent antenna adhesion and reduced back mark affected area when attached to an electronic product housing is provided.
The inventors of the present invention have made extensive studies to find that, when the double-layer film structure of the present invention is used and the thickness of the antenna layer in the first film is limited to a specific range, an antenna film having a reduced back mark affected area and excellent antenna adhesion when attached to a housing of an electronic product can be provided, and thus the present invention has been completed.
That is, the present invention provides an antenna film attached to a housing of an electronic product, wherein the antenna film includes a first film and a second film attached to each other, the first film includes a first substrate and an antenna layer, the antenna layer is formed on one side of the first substrate, the other side of the first substrate is attached to the second film, the second film includes a second substrate, a glue layer and a decorative layer, the glue layer covers one side of the second substrate, the decorative layer is formed on the other side of the second substrate, and is attached to the first film on one side of the decorative layer of the second film, wherein the thickness of the antenna layer is 5-30 μm.
Preferably, the thickness of the antenna layer is 8-20 μm.
Preferably, the first membrane comprises a first substrate, a first ink layer and an antenna layer, the first ink layer is formed on one surface of the first substrate, the antenna layer is at least partially embedded into the first ink layer, and the other surface of the first substrate is attached to the second membrane;
preferably, the first ink layer contains a resin and a laser-activatable metal oxide dispersed in the resin;
preferably, the laser-activatable metal compound is a compound of formula I,
ABmOn(formula I)
In the formula I, A is one or more of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column of the periodic table of the elements, or A is A1And A2，A1Is one or more than two of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column in the periodic table of elements, A2Is one or more than two elements in the 1 st column and the 2 nd column in the periodic table of elements;
when A contains a metal element in the 8 th column, B is one or more than two elements in the 4 th column, the 6 th column, the 7 th column and the 13 th column in the periodic table of the elements; b is one or more than two elements in the 4 th, 6 th, 7 th, 8 th and 13 th columns of the periodic table when A does not contain the 8 th column metal element;
m is 1 or 2, n is 2, 3 or 4, and m < n;
preferably, the laser-activatable metal compound is CuCr2O4。
Preferably, the resin is one or more of polyurethane-based resin, epoxy resin, acrylic resin, polyester resin, alkyd resin and drying oil resin.
Preferably, the thickness of the first ink layer is 5-100 μm.
Preferably, the surface of the first ink layer on which the antenna is to be formed is irradiated with an energy beam, and then the antenna layer is formed by electroless metal plating.
Preferably, the adhesive layer is an OCA optical adhesive layer;
preferably, the OCA optical adhesive in the OCA optical adhesive layer is an acrylate optical adhesive, an epoxy resin optical adhesive, a polyurethane optical adhesive, a silicone resin optical adhesive, or an acrylate-modified EVA (acrylate-modified ethylene-vinyl acetate copolymer).
Preferably, the OCA optical cement in the OCA optical cement layer is acrylate optical cement or acrylate modified EVA.
Preferably, the thickness of the glue layer is 3-50 μm.
Preferably, the second film sheet further comprises a release film for protecting the adhesive layer.
Preferably, the second film further comprises a UV transfer glue layer, the UV transfer glue layer being located between the second substrate and the decorative layer.
Preferably, the thickness of the UV transfer glue layer is 5-50 μm.
Preferably, the materials of the first substrate and the second substrate are each one or more of polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and polyimide; more preferably, the material of the first substrate and the second substrate is polyethylene terephthalate.
Preferably, the thickness of each of the first substrate and the second substrate is 10 to 200 μm.
Preferably, the decoration layer is a physical vapor deposition layer, or the decoration layer is a physical vapor deposition layer and a second ink layer formed on the physical vapor deposition layer.
Preferably, the first membrane sheet and the second membrane sheet are attached by an adhesive layer.
Preferably, the thickness of the adhesive layer is 5 to 50 μm.
Preferably, the electronic product shell is a transparent piece; more preferably, the transparent member is glass.
Preferably, a back mark influence area formed when the antenna diaphragm is attached to the electronic product shell is less than or equal to 2mm, wherein the back mark influence area refers to the width of a groove-shaped mark formed at the peripheral edge position of the antenna; more preferably, a back mark influence area formed when the antenna diaphragm is attached to the electronic product shell is less than or equal to 1.5 mm; further preferably, the back mark influence area formed when the antenna diaphragm is attached to the electronic product shell is 0.25-1.5 mm.
According to a second aspect of the present invention, there is provided a rear case for a terminal, the rear case including an electronic product housing and the antenna film of the present invention attached to the electronic product housing, the antenna film being attached to a surface of the electronic product housing.
Preferably, the electronic product shell is a transparent piece; more preferably, the transparent member is glass.
Preferably, the terminal is a mobile phone, and the rear shell is a mobile phone rear shell.
According to a third aspect of the present invention, there is provided a rear case applied to a terminal, the rear case including an electronic product housing and an antenna film attached to the electronic product housing, the antenna film including a first film and a second film attached to each other, the first film including a first substrate and an antenna layer, the antenna layer being formed on one side of the first substrate, the other side of the first substrate being attached to the second film, the second film including a second substrate, a glue layer covering one side of the second substrate, and a decorative layer formed on the other side of the second substrate and attached to the first film on one side of the decorative layer of the second film, wherein the antenna layer has a thickness of 5 to 30 μm.
Preferably, the electronic product shell is a transparent piece; more preferably, the transparent member is glass.
Preferably, the terminal is a mobile phone, and the rear shell is a mobile phone rear shell.
According to a fourth aspect of the present invention, there is provided a terminal comprising a terminal body and the rear case of the present invention.
According to a fifth aspect of the present invention, a method for manufacturing a terminal rear shell is provided, in which the antenna film attached to an electronic product housing of the present invention is attached to a surface of the electronic product housing.
According to a sixth aspect of the invention, there is provided a use of the antenna film attached to a housing of an electronic product of the invention in the manufacture of a terminal.
Preferably, the invention provides the application of the antenna diaphragm attached to the shell of the electronic product in the preparation of the rear shell of the mobile phone.
Through above-mentioned technical scheme, have following advantage.
1) The internal space of the terminal can be saved, the light and thin product can be realized, and a large amount of antenna designs and use spaces can be provided.
2) The glass or ceramic rear shell is adopted, the risk of breakage exists when the antenna falls, and the antenna provided by the invention is arranged on the surface of a single diaphragm (namely the surface of the first base material), so that the function of the antenna is not influenced even if the rear shell is broken.
3) When the antenna diaphragm is attached to the electronic product shell, the back mark influence area can be reduced.
4) In the single-layer membrane in the prior art, the antenna is formed by directly printing conductive ink on the decorative membrane and then baking and drying the decorative membrane, and the appearance of the original decorative membrane is affected. In contrast, the invention adopts a double-layer membrane structure, can independently prepare the conducting layer and does not influence the original decorative layer.
5) The scheme adds the buffer layer (namely the first substrate) to reduce poor impression of the appearance surface of the product in the attaching process.
Drawings
Fig. 1 is a schematic view of an antenna diaphragm according to an embodiment of the present invention.
Fig. 2 is a schematic view of an antenna diaphragm according to another embodiment of the present invention.
Fig. 3 is a picture showing a back mark when the glass of the mobile phone of the embodiment of the present invention is observed using a microscope.
Description of the reference numerals
1 first diaphragm 11 first substrate
12 antenna layer 13 first ink layer
2 second membrane 21 second substrate
22 glue layer 23 decorative layer
24 UV transfer glue layer 3 adhesive layer
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In the present invention, the "back mark-affected zone" refers to a width of a groove-like mark formed at a position around the antenna.
According to a first aspect of the present invention, an antenna film attached to an electronic product housing is provided, wherein the antenna film includes a first film and a second film attached to each other, the first film includes a first substrate and an antenna layer, the antenna layer is formed on one side of the first substrate, the other side of the first substrate is attached to the second film, the second film includes a second substrate, a glue layer and a decorative layer, the glue layer covers one side of the second substrate, the decorative layer is formed on the other side of the second substrate, and is attached to the first film on one side of the decorative layer of the second film, and the thickness of the antenna layer is 5-30 μm.
According to the invention, the back mark influence area formed when the antenna diaphragm is attached to the electronic product shell is preferably less than or equal to 2mm, and more preferably less than or equal to 1.5 mm. In consideration of reducing both the back mark influence area formed when the antenna film is attached to the electronic product housing and the adhesion force of the antenna, the back mark influence area formed when the antenna film is attached to the electronic product housing is preferably 0.25-1.5mm, and more preferably 0.25-1.24 mm.
According to the invention, the antenna film can be applied to a terminal, specifically, the antenna film can be attached to the surface of a shell of an electronic product to form a rear shell of the terminal, and the antenna film 10 plays a role of an antenna. The terminal may be a mobile terminal, and the mobile terminal refers to a computer device that can be used in mobile, including but not limited to a mobile phone, a notebook, a tablet computer, a POS machine, a vehicle-mounted computer, a camera, and the like.
The electronic product housing is preferably a transparent material, and the transparent material may be glass or transparent plastic as long as the transparent material can pass signals and can be used as a transparent housing, and the transparent plastic may be polymethyl methacrylate, polycarbonate or polyethylene terephthalate; preferably, the transparent member is glass.
As described above, the antenna film of the present invention includes the first film and the second film attached to each other, and the first film and the second film and the method for manufacturing the same will be described below.
1. First diaphragm
Fig. 1 is a schematic view of an antenna film according to an embodiment of the present invention, and as shown in fig. 1, the first film 1 includes a first substrate 11 and an antenna layer 12, the antenna layer 12 is formed on one surface of the first substrate 11, and the other surface of the first substrate 11 is attached to the second film 2.
In a preferred embodiment of the present invention, the first film sheet 1 further comprises a first ink layer 13. Specifically, as shown in fig. 2, the first film sheet 1 includes a first substrate 11, a first ink layer 13, and an antenna layer 12, the first ink layer 13 is formed on one surface of the first substrate 11, the antenna layer 12 is at least partially embedded in the first ink layer 13, and the other surface of the first substrate 11 is attached to the second film sheet 2.
In the present invention, "the antenna layer is at least partially embedded in the first ink layer" means: the antenna layer is at least partially embedded in the first ink layer in the thickness direction. Preferably partially embedded in the first ink layer, more preferably embedded in the first ink layer to a thickness of 2-5 um.
In the above preferred embodiment, the first ink layer contains a resin and a laser-activatable metal oxide dispersed in the resin.
According to the invention, the laser-activatable metal compound may be selected from compounds of the formula I,
ABmOn(formula I)
In the formula I, A is one or more of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column of the periodic table of the elements, or A is A1And A2，A1Is one or more than two of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column in the periodic table of elements, A2Is one or more than two elements in the 1 st column and the 2 nd column in the periodic table of elements;
when A contains a metal element in the 8 th column, B is one or more than two elements in the 4 th column, the 6 th column, the 7 th column and the 13 th column in the periodic table of the elements; b is one or more than two elements in the 4 th, 6 th, 7 th, 8 th and 13 th columns of the periodic table when A does not contain the 8 th column metal element;
m is 1 or 2, n is 2, 3 or 4, and m < n.
In the present invention, examples of the element in column 4 of the periodic table include: ti, Zr or Hf.
In the present invention, examples of the elements in column 6 of the periodic table include: cr, Mo or W.
In the present invention, examples of the element in column 7 of the periodic table include: mn or Re.
In the present invention, examples of the metal elements in column 8 of the periodic table include: fe. Ru or Os, preferably Fe.
In the present invention, examples of the metal elements in column 9 of the periodic table include: co, Rh or Ir, preferably Co.
Examples of the metal elements in column 10 of the periodic table include: ni, Pd or Pt, preferably Ni.
Examples of the metal elements in column 11 of the periodic table include: cu, Ag or Au, preferably Cu.
In the present invention, examples of the element in column 13 of the periodic table include: B. al, Ga, In or Tl.
Further, a is preferably one or more of Fe, Co, Ni, and Cu.
A1Preferably one or more of Fe, Cu and Ni, A2Preferably one or more of Li, Na, K, Cs, Mg, Ca, Sr and Ba.
Where A is A1And A2When, A1And A2The relative ratio therebetween is not particularly limited. In general, A1And A2May be 1: 0.1 to 10, preferably 1: 0.2-0.5.
B is preferably one or more of Al, Fe, Mn, Cr, Mo, W, Ti and Zr.
Specifically, specific examples of the metal compound may include, but are not limited to: CuAl0.5Cr0.5O2、CaCu3Ti4O12、CuAlO2、CuCrO2、CuZrO3、CuCr2O4、CaCu3Ti4O12、NiTiO3、NiWO4、CuMnO4、CuMoO4、CuFeO2And FeMn2O4One or more than two of them. Among them, CuCr is preferable2O4。
According to the present invention, the resin may be any of various resins commonly used in the art for forming an ink layer, and examples of such resins include one or more of polyurethane-based resins, epoxy resins, acrylic resins, polyester resins, alkyd resins, and drying oil resins, and preferably, the resin is a polyurethane-based resin.
In the present invention, the first ink layer may be formed by an ink composition containing a resin, a solvent, and a laser-activatable metal compound.
According to the invention, the laser-activatable metal compound may be selected from compounds of the formula I,
ABmOn(formula I)
In the formula I, A is one or more of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column of the periodic table of the elements, or A is A1And A2，A1Is one or more than two of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column in the periodic table of elements, A2Is one or more than two elements in the 1 st column and the 2 nd column in the periodic table of elements;
when A contains a metal element in the 8 th column, B is one or more than two elements in the 4 th column, the 6 th column, the 7 th column and the 13 th column in the periodic table of the elements; b is one or more than two elements in the 4 th, 6 th, 7 th, 8 th and 13 th columns of the periodic table when A does not contain the 8 th column metal element;
m is 1 or 2, n is 2, 3 or 4, and m < n.
A is preferably one or more of Fe, Co, Ni and Cu.
A1Preferably one or more of Fe, Cu and Ni, A2Preferably one or more of Li, Na, K, Cs, Mg, Ca, Sr and Ba.
Where A is A1And A2When, A1And A2The relative ratio therebetween is not particularly limited. In general, A1And A2May be 1: 0.1 to 10, preferably 1: 0.2-0.5.
B is preferably one or more of Al, Fe, Mn, Cr, Mo, W, Ti and Zr.
Specifically, specific examples of the metal compound may include, but are not limited to: CuAl0.5Cr0.5O2、CaCu3Ti4O12、CuAlO2、CuCrO2、CuZrO3、CuCr2O4、CaCu3Ti4O12、NiTiO3、NiWO4、CuMnO4、CuMoO4、CuFeO2And FeMn2O4One or more than two of them. Among them, CuCr is preferable2O4。
According to the present invention, the resin may be any of various resins commonly used in the art for forming an ink layer, and examples of such resins include one or more of polyurethane-based resins, epoxy resins, acrylic resins, polyester resins, alkyd resins, and drying oil resins, and preferably, the resin is a polyurethane-based resin.
According to the present invention, a coating material is obtained by mixing an ink composition containing a resin, a solvent which can achieve the above object, and a laser-activatable metal compound, the solvent being not particularly limited and may be, for example, one or more of ketones, alcohol esters, and benzenes; preferably one or more of cyclohexanone, propylene glycol methyl ether acetate, butyl acetate and xylene.
According to the present invention, the first ink layer is obtained by mixing an ink composition containing a resin, a solvent, and a laser-activatable metal compound to obtain a coating material, applying the coating material, and then curing the coating material.
In the present invention, the thickness of the first ink layer may be, for example, 5 to 100 μm, preferably 10 to 50 μm.
According to the invention, the antenna layer is formed in the first membrane 1, so that the antenna membrane can be used as an antenna when being attached to a terminal rear shell. In addition, the antenna layer can be well shielded by the second film 2, so that a terminal rear case with excellent appearance can be formed when the antenna film of the present invention is attached to the terminal rear case. In addition, the invention does not affect the function of the antenna when the terminal back shell such as glass is broken by the structure of the double diaphragms.
According to the present invention, the material of the first substrate 11 may be one or more of polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and polyimide. Since polyethylene terephthalate has excellent physical and mechanical properties in a wide temperature range, a long-term use temperature of 120 ℃, excellent electrical insulation properties, and good electrical properties even at high temperature and high frequency, and further, it has good creep resistance, fatigue resistance, friction resistance, and dimensional stability, the material of the first base material 11 is preferably polyethylene terephthalate.
According to the present invention, the first substrate 11 is a sheet, preferably, the thickness thereof may be 10 to 200 μm, and by making the thickness of the first substrate 11 within the above range, there is an advantage that strength requirements are satisfied, the thickness is thin, and space is saved.
According to the present invention, the antenna layer 12 is a layer formed of various materials for forming an antenna, which are well known to those skilled in the art, and specifically, the antenna layer 12 is preferably a metal layer, which is preferably a layer formed of one or more metals selected from copper, nickel, silver, and gold.
In a preferred embodiment of the present invention, the antenna layer is formed by: and irradiating the surface of the first ink layer, which is required to form the antenna, with an energy beam, and then performing electroless metal plating to form the antenna layer.
The thickness of the antenna layer 12 is preferably 8 to 20 μm, and more preferably 8 to 15 μm, from the viewpoint of further reducing the back mark-affected zone and improving the antenna adhesion. By making the thickness of the antenna layer 12 within the above range, there are advantages of excellent electrical conductivity and space saving.
2. Second diaphragm
Fig. 1 and 2 are schematic views of the antenna film of the present invention, and as shown in fig. 1 and 2, the second film 2 includes a second substrate 21, a glue layer 22, and a decorative layer 23, in the second film 2, the glue layer 22 covers one surface of the second substrate, and the decorative layer 23 is formed on the other surface of the second substrate 21, and is attached to the first film 1 on the side of the decorative layer 23 of the second film 2.
According to the present invention, the material of the second substrate 21 may be one or more of polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and polyimide. Since polyethylene terephthalate has excellent physical and mechanical properties in a wide temperature range, a long-term use temperature of 120 ℃, excellent electrical insulation properties, and good electrical properties even at high temperatures and high frequencies, and further, it has good creep resistance, fatigue resistance, friction resistance, and dimensional stability, the material of the second substrate 21 is preferably polyethylene terephthalate. In addition, the material of the first base material 11 is preferably the same as that of the second base material 21.
According to the present invention, the second substrate 21 is a sheet, preferably, the thickness thereof may be 10 to 200 μm, and by making the thickness of the second substrate 21 within the above range, there is an advantage of high transparency.
According to the present invention, the adhesive layer 22 is located on one side of the second substrate 21 for attaching the antenna film to the electronic product housing, and the adhesive layer 22 is preferably an OCA optical adhesive layer. Preferably, the OCA optical adhesive in the OCA optical adhesive layer is acrylate optical adhesive, epoxy resin optical adhesive, polyurethane optical adhesive, silicone resin optical adhesive or acrylate modified EVA; more preferably, the OCA optical cement in the OCA optical cement layer is acrylate optical cement or acrylate modified EVA.
The OCA optical adhesive layer 22 is preferably a layer made of an OCA optical adhesive having a hardness of 0.3GPa to 5 GPa. As such OCA optical adhesive layer, for example, a layer formed of an optical adhesive available from SKC, LG, and mitsubishi of korea is available. The layer formed by using the OCA optical cement has good deformation resistance effect.
The thickness of the adhesive layer 22 is preferably 3 to 50 μm, more preferably 5 to 20 μm, and the adhesive layer 22 having a thickness within the above range has an advantage of good adhesiveness and deformation resistance.
According to the present invention, preferably, the decoration layer 23 is a physical vapor deposition layer, or the decoration layer 23 is a physical vapor deposition layer and a second ink layer formed on the physical vapor deposition layer. The vapour-deposition layer can be, for example, 2 to 8 layers, each of which can be, for example, 5 to 200nm thick. The second ink layer can be, for example, 1 to 5 layers, each of which can be, for example, 5 to 50 μm thick.
Preferably, the refractive index of the physical vapor deposition layer is 1.8 to 3 or 1 to 1.7. Examples of such a physical vapor deposition layer include a layer formed of an oxide of titanium or niobium, a layer formed of a carbide or nitride of silicon, and a layer formed of silicon dioxide.
The second ink layer may be formed by screen printing ink, which may be, for example, ink composed of a binder (resin), a pigment, a filler, an auxiliary agent, a solvent, and the like. The vehicle (resin), pigment, filler, auxiliary agent and solvent may be various resin pigments, fillers, auxiliary agents and solvents commonly used in the art, and will not be described herein in a repeated manner. Such an ink is commercially available, for example, as model number HTK501 from cormeda.
In a preferred embodiment of the present invention, the decoration layer 23 is formed of a plurality of physical vapor deposition layers in which high refractive index physical vapor deposition layers and low refractive index physical vapor deposition layers are alternately arranged, and the vapor deposition layers are 2 to 8 layers each having a thickness of 5 to 200 nm.
In another preferred embodiment of the present invention, the decoration layer 23 is formed of a plurality of physical vapor deposition layers in which high refractive index physical vapor deposition layers and low refractive index physical vapor deposition layers are alternately arranged, and a second ink layer formed on the physical vapor deposition layers; the vapor deposition layer is 2-8 layers, and the thickness of each layer is 5-200 nm; the second ink layer is 1-5 layers, and the thickness of each layer is 5-50 μm.
Through the decorative layer 23, when the antenna film is attached to the electronic product shell, a terminal shell with excellent appearance can be obtained.
According to the present invention, it is preferable that the second film further comprises a UV transfer glue layer 24, and the UV transfer glue layer 24 is located between the second substrate 21 and the decoration layer 23 for the purpose of realizing an appearance pattern. By locating the UV transfer glue layer 24 between the second substrate 21 and the decorative layer 23, the advantage of an attractive and three-dimensional appearance is achieved. In addition, the thickness of the UV transfer adhesive layer 24 is preferably 5 to 50 μm.
According to the present invention, preferably, the second film sheet 2 further includes a release film 25 for protecting the adhesive layer 22. The release film 25 may be various release films commonly used in the art for protecting an adhesive layer.
According to the invention, the first membrane 1 and the second membrane 2 have an adhesive layer 3 between them. The first and second film sheets are attached to each other by the adhesive layer 3. More specifically, the other surface of the first substrate 11 of the first film sheet 1 and the decorative layer of the second film sheet 2 are bonded to each other via the adhesive layer 3. The thickness of the adhesive layer may be, for example, 5 to 50 μm.
3. Method for preparing first membrane
In the present invention, the first diaphragm 1 is formed by forming the antenna layer 12 on one surface of the first substrate 11.
The method for forming the antenna layer 12 on one side of the first substrate 11 may be various methods commonly used in the art, for example, a silver paste may be silk-screened on one side of the first substrate 11, so that the first membrane sheet 1 (the specific structure is shown in fig. 1) for forming the antenna layer 12 directly on the surface of the first substrate 11 may be obtained.
The above method and conditions for forming the antenna layer by screen printing silver paste are well known in the art, and will not be described herein.
Alternatively, the first ink layer 13 may be formed by spraying (screen printing) the ink composition on one surface of the first substrate 11, and then irradiating the surface of the first ink layer 13 on which the antenna is to be formed with an energy beam, and then performing electroless metal plating on the irradiated product to obtain the first film 1 having the antenna function (the specific structure is shown in fig. 2). Specifically, it can be prepared by the following steps.
(1) Preparing powder containing resin, solvent and metal compound capable of being activated by laser into coating, spraying the coating on one surface of a first substrate 11, and curing the coating to obtain a first ink layer 13;
(2) carrying out laser activation on an antenna area to be formed;
(3) the antenna layer 12 is formed by electroless plating.
In step (1), the laser-activatable metal compound may be various laser-activatable metal compounds commonly used in the art, and may be selected from compounds represented by formula I,
ABmOn(formula I)
In the formula I, A is one or more of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column of the periodic table of the elements, or A is A1And A2，A1Is one or more than two of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column in the periodic table of elements, A2Is one or more than two elements in the 1 st column and the 2 nd column in the periodic table of elements;
when A contains a metal element in the 8 th column, B is one or more than two elements in the 4 th column, the 6 th column, the 7 th column and the 13 th column in the periodic table of the elements; b is one or more than two elements in the 4 th, 6 th, 7 th, 8 th and 13 th columns of the periodic table when A does not contain the 8 th column metal element;
m is 1 or 2, n is 2, 3 or 4, and m < n.
A is preferably one or more of Fe, Co, Ni and Cu.
A1Preferably one or more of Fe, Cu and Ni, A2Preferably one or more of Li, Na, K, Cs, Mg, Ca, Sr and Ba.
Where A is A1And A2When, A1And A2The relative ratio therebetween is not particularly limited. In general, A1And A2May be 1: 0.1 to 10, preferably 1: 0.2-0.5.
B is preferably one or more of Al, Fe, Mn, Cr, Mo, W, Ti and Zr.
In particular, the laser-activatable metalSpecific examples of compounds may include, but are not limited to: CuAl0.5Cr0.5O2、CaCu3Ti4O12、CuAlO2、CuCrO2、CuZrO3、CuCr2O4、CaCu3Ti4O12、NiTiO3、NiWO4、CuMnO4、CuMoO4、CuFeO2And FeMn2O4One or more than two of them. Among them, CuCr is preferable2O4。
In the step (1), the resin may be any of various resins commonly used in the art for forming an ink layer, and examples of such a resin include one or more of a polyurethane-based resin, an epoxy resin, an acrylic resin, a polyester resin, an alkyd resin, and a drying oil resin, and preferably, the resin is a polyurethane-based resin.
In the step (1), the solvent may be, for example, one or more of ketones, alcohol esters and benzenes; preferably one or more of cyclohexanone, propylene glycol methyl ether acetate, butyl acetate and xylene.
In addition, in the step (1), the thickness of the ink layer obtained after curing may be, for example, 5 to 100 μm, preferably 10 to 50 μm.
Preferably, in the step (2), the laser activation conditions include: the laser wavelength of the energy beam is 157nm-10.6 mu m; the scanning speed is 100-10000 mm/s; delaying for 0-500 us; the frequency is 10-800KHz, the power is 5-25W, and the filling space is 10-100 μm; more preferably, the laser activation conditions include: the laser wavelength of the energy beam is 300nm-5 mu m; the scanning speed is 500-5000 mm/s; delaying for 0-300 us; the frequency is 50-500KHz, the power is 5-25W, and the filling distance is 10-100 μm.
In the step (3), preferably, the antenna layer 12 is formed by sequentially performing electroless copper plating and electroless nickel plating, or the antenna layer 12 is formed by sequentially performing electroless copper plating and electroless silver plating.
In the step (3), the electroless plating conditions may be various conditions commonly used in the art for electroless plating. For example, in the case of electroless copper plating, electroless copper plating can be performed at a temperature of 40 to 65 ℃ and a pH of 11 to 14 using an electroless copper plating solution (e.g., electroless copper 101). In the electroless nickel plating, electroless nickel plating may be performed at a temperature of 60 to 90 ℃ and a pH of 4 to 7 using an electroless nickel plating solution (e.g., electroless nickel 304).
Further, the adhesive layer 13 may be provided on the other surface of the first substrate 11 to bond the first film sheet 1 and the second film sheet 2 to each other.
4. Preparation method of second membrane
The second membrane of the present invention can be prepared by the following method.
1) Providing a step of providing a second substrate provided on one side with said glue layer 22
2) A step of forming a UV transfer paste layer 24 on the other surface of the second base material 21 by screen printing;
3) a step of forming a physical vapor deposition layer on the UV transfer adhesive layer 24 by physical vapor deposition, and forming a second ink layer as needed;
for the convenience of storage and prevention of contamination of the antenna film, a release film is preferably disposed on the second substrate adhesive layer 22.
The step 1) may be performed by a commercially available product, or may be performed by providing the adhesive layer 22 on one surface of the second substrate.
The above-mentioned method and conditions for forming the UV transfer adhesive layer 24 by screen printing, and the method and conditions for forming the physical vapor deposition layer and the second ink layer on the UV transfer adhesive layer 24 are well known in the art, and will not be described herein again.
According to a second aspect of the present invention, there is provided a rear case for a terminal, the rear case comprising an electronic product housing and the antenna film of the present invention, wherein the antenna film is attached to a surface of the electronic product housing.
Preferably, the electronic product shell is a transparent piece; more preferably, the transparent member is glass or transparent plastic, and the transparent plastic can be polymethyl methacrylate, polycarbonate or polyethylene terephthalate; still further preferably, the transparent member is glass.
According to a third aspect of the present invention, there is provided a rear case applied to a terminal, the rear case including an electronic product housing and an antenna film attached to the electronic product housing, the antenna film including a first film and a second film attached to each other, the first film including a first substrate and an antenna layer, the antenna layer being formed on one side of the first substrate, the other side of the first substrate being attached to the second film, the second film including a second substrate, a glue layer covering one side of the second substrate, and a decorative layer formed on the other side of the second substrate and attached to the first film on one side of the decorative layer of the second film, wherein the antenna layer has a thickness of 5 to 30 μm.
Preferably, the electronic product shell is a transparent piece; more preferably, the transparent member is glass or transparent plastic, and the transparent plastic can be polymethyl methacrylate, polycarbonate or polyethylene terephthalate; still further preferably, the transparent member is glass.
According to a fourth aspect of the present invention, there is provided a terminal comprising a terminal body and the rear case of the present invention.
According to a fifth aspect of the present invention, a method for manufacturing a terminal rear shell is provided, in which the antenna film attached to an electronic product housing of the present invention is attached to a surface of the electronic product housing.
The method and conditions for attaching the antenna film to the surface of the electronic product case according to the present invention may employ various methods and conditions generally used for film attachment in the art. For example, the second film and the first film may be sequentially attached to the surface of the housing of the electronic product by a film attaching machine, and then the bubble removing process may be performed by a bubble removing machine.
According to a sixth aspect of the invention, there is provided a use of the antenna film attached to a housing of an electronic product of the invention in the manufacture of a terminal.
Preferably, the invention provides the application of the antenna diaphragm attached to the shell of the electronic product in the preparation of the rear shell of the mobile phone.
The present invention will be described in detail below by way of examples, but the present invention is not limited to the following examples.
The following methods were used in the following examples.
1) And (3) testing the adhesive force: the adhesion of the coatings and coatings was tested using the ASTM D3002 hundreds method.
2) Film thickness test of plating layer
The product adopts a metallographic sample preparation method, and the metallographic sample preparation process mainly comprises the following steps: cutting and sampling, inlaying a sample, mechanically preparing the sample, inspecting the sample and the like:
(1) cutting and sampling, namely cutting a product into a size of 0.5 multiplied by 0.5cm by adopting a silicon carbide (SiC) cutting piece;
(2) vertically embedding the sample in resin by adopting a hot embedding method;
(3) mechanically preparing a sample, and grinding and polishing to obtain a fine sample section;
(4) and testing the thickness of the surface resin by adopting a metallographic microscope, and testing by using software after photographing.
3) Characterization of the back mark: the size of the groove-like trace formed at the peripheral edge of the antenna was observed by a digital microscope from the back surface (transparent glass surface), and the width of the groove-like trace was used to characterize the trace-affected zone. In addition, the trace-affected zone was less than 2mm, and was not visible to the naked eye. Fig. 3 shows groove-like marks formed at the peripheral edge of the antenna.
The equipment model is as follows: bashen VHX6000 digital microscope
Light intensity: maximum value 255 of built-in LED light source
Lens: VH-ZST20-2000
Magnification: 20 times of
Light ray: coaxial light
Inclination angle of the lens: 3 degree
Focusing distance: 10-15mm
Rotating the objective table: 360 degree
Example 1
1) Preparation of the first Membrane
Mixing 800g of propylene glycolAcid resin (number average molecular weight 3000), 100g laser activatable powder (CuCr)2O4Average particle size of 500nm), 100g of talcum powder, 20g of DISPERBYK-110 and zirconium beads with diameter of 1.0mm are proportionally added into a sand mill for grinding for 1h to obtain resin slurry with fineness of 15 mu m; then adding 500g of methyl isobutyl ketone into the resin slurry for three times, and keeping stirring at a constant speed for 20min in a high-speed dispersion machine at 500 r/min; continuously keeping the uniform stirring, and slowly dripping 3g of BYK-333 leveling agent, 2g of BYK-054 defoaming agent and 50g of methyl isobutyl ketone into the coating system within 30 min; finally, the product in the container is filtered by 120-mesh filter cloth to obtain the component A of the coating.
700g of Desmodur N3390 and 300g of butyl acetate are mixed, and then are dispersed at a high speed of 500r/min for 10min, 3g of dibutyltin dilaurate is slowly added in the process, and the obtained liquid is filtered by 120 meshes of filter cloth to obtain the component B of the coating.
A, B components are mixed according to the mass ratio of 10: 4 stirring for 10min after mixing, uniformly spraying on a PET plastic sheet (thickness of 50 μm) with a coating film thickness of 20 μm, and carrying out an adhesion test on the coating according to a cross-cut method, wherein the result is 5B.
And carrying out laser etching on the sprayed plastic part according to the wiring pattern, wherein the laser parameters are as follows: wavelength 1064nm, scanning speed 1000mm/s, step length 9 μm, delay 30 μ s, frequency 40KHz, power 3W, and filling interval 50 μm.
Immersing the plastic part subjected to laser etching into chemical copper plating solution for 1 hour to form a copper layer with the thickness of 10 microns, and immersing into chemical nickel solution for 10 minutes to form a nickel layer with the thickness of 3 microns on the outer surface of the copper layer; chemical copper plating solution: CuSO4·5H2O 0.12mol/L，Na2EDTA·2H20.14mol/L of O, 10mg/L of potassium ferrocyanide, 10mg/L of 2, 2' -bipyridine and 0.1mol/L of glyoxylic acid, and NaOH and sulfuric acid are used for adjusting the pH value of the plating solution to 12.5-13; chemical nickel plating solution: nickel sulfate: 23g/L, sodium hypophosphite: 18g/L, lactic acid: 20g/L, malic acid 15g/L, pH adjusted to 5.2 with NaOH.
After the chemical plating, a pre-designed metal circuit can be obtained on the plastic part, and the plating layer and the coating are respectively subjected to adhesion test according to a cross-cut method, and the result is 5B.
2) Preparation of the second Membrane
(1) An optical adhesive layer (10 μm thick, formed by coating an optical adhesive available from model QJ500 of LS & j.co.ltd, korea) was prepared on one side of the PET plastic sheet, and a release film was attached to the optical adhesive layer for protection.
(2) Forming a UV transfer glue layer (with the thickness of 20 microns) on the other surface of the PET plastic sheet (with the thickness of 50 microns) by screen printing;
(3) forming a plurality of physical vapor deposition layers with high and low refractive indexes on the UV transfer glue layer through physical vapor deposition to realize a color effect, wherein the physical vapor deposition layers are subjected to vacuum pumping to 0.001Pa, argon and oxygen are introduced to the vacuum degree of 0.5Pa for film coating in sequence, and the formed physical vapor deposition layers are sequentially Nb2O5(thickness 60nm), SiO2(thickness 50nm) and Nb2O5(thickness 60nm) and SiO2(thickness 50 nm); finally, a black ink (available from the company Ke-Meida, model number HTK501) was screen printed to form an ink layer (thickness 40 μm).
3) And removing the release film, attaching a second film and the first film to the inner surface of the mobile phone glass rear shell in sequence by using a film attaching machine, and removing bubbles by using a bubble removing machine to obtain the mobile phone glass rear shell A1 with the antenna film.
The mobile phone glass rear shell A1 prepared by the method does not affect the appearance of the original decorative film, has an antenna function, and does not affect the antenna function even if the glass rear shell is broken. Further, no back mark was observed with the naked eye, and the area affected by the back mark was 0.78mm when observed by the above measurement method 3).
Comparative example 1
1) An optical adhesive layer (10 μm thick, formed by coating an optical adhesive available from model QJ500 of LS & j.co.ltd, korea) was prepared on one side of the PET plastic sheet, and a release film was attached to the optical adhesive layer for protection.
2) Forming a UV transfer glue layer (with the thickness of 20 microns) on the other surface of the PET plastic sheet (with the thickness of 50 microns) by screen printing;
3) by physical vapor deposition onForming a plurality of physical vapor deposition layers with high refractive index and low refractive index on the UV transfer glue layer to realize the color effect, wherein the physical vapor deposition layers are subjected to vacuum pumping to 0.001Pa, argon and oxygen are introduced to the vacuum degree of 0.5Pa for film coating in sequence, and the formed physical vapor deposition layers are Nb in sequence2O5(thickness 60nm), SiO2(thickness 50nm) and Nb2O5(thickness 60nm) and SiO2(thickness 50 nm); finally, the black ink (same as above) was screen printed to form an ink layer (thickness 40 μm).
4) A, B component is prepared according to the same method of the example 1, and A, B component is mixed according to the mass ratio of 10: 4, stirring for 10min after mixing, and uniformly spraying the ink layer formed in the step 3), wherein the thickness of the coating film is 20 mu m.
And carrying out laser etching on the sprayed plastic part according to the wiring pattern, wherein the laser parameters are as follows: wavelength 1064nm, scanning speed 1000mm/s, step length 9 μm, delay 30 μ s, frequency 40KHz, power 3W, and filling interval 50 μm.
Immersing the plastic part subjected to laser etching into chemical copper plating solution for 1 hour to form a copper layer with the thickness of 10 microns, and immersing into chemical nickel solution for 10 minutes to form a nickel layer with the thickness of 3 microns on the outer surface of the copper layer; chemical copper plating solution: CuSO4·5H2O 0.12mol/L，Na2EDTA·2H20.14mol/L of O, 10mg/L of potassium ferrocyanide, 10mg/L of 2, 2' -bipyridine and 0.1mol/L of glyoxylic acid, and NaOH and sulfuric acid are used for adjusting the pH value of the plating solution to 12.5-13; chemical nickel plating solution: nickel sulfate: 23g/L, sodium hypophosphite: 18g/L, lactic acid: 20g/L, malic acid 15g/L, pH adjusted to 5.2 with NaOH.
The diaphragm with the pre-designed metal circuit formed on the plastic part can be obtained after the chemical plating.
5) And removing the release film, attaching the film to the inner surface of the mobile phone glass rear shell by using a film attaching machine, and then carrying out defoaming treatment by using a defoaming machine to obtain the mobile phone glass rear shell D1 with the antenna film.
The film attached to the inner surface of the rear glass of a mobile phone caused bubbles due to the destruction of the OCA gel layer by the electroless plating solution, and the back mark was remarkable, and specifically, the area affected by the back mark was 3.5mm when observed by the measurement method 3).
Example 2
1) Preparation of the first Membrane
The same procedure as in example 1 was followed, except that the laser-etched plastic part was immersed in an electroless copper plating solution for 0.5 hour to form a copper layer having a thickness of 5 μm, and immersed in an electroless nickel plating solution for 10 minutes to form a nickel layer having a thickness of 3 μm on the outer surface of the copper layer;
after the chemical plating, the plating layer and the coating were subjected to adhesion test by a cross-hatch method, respectively, and the result was 5B.
2) Preparing a second membrane: same as example 1;
3) and (3) attaching a second membrane and the first membrane to the inner surface of the mobile phone glass rear shell in sequence by using a membrane attaching machine, and then carrying out defoaming treatment by using a defoaming machine to obtain the mobile phone glass rear shell A2 with the antenna membrane.
The mobile phone glass rear shell A2 prepared by the method does not affect the appearance of the original decorative film, has an antenna function, and does not affect the antenna function even if the glass rear shell is broken. Further, no back mark was observed with the naked eye, and the area affected by the back mark was 0.25mm when observed by the above measurement method 3).
Example 3
1) Preparation of the first Membrane
The same procedure as in example 1 was followed, except that the laser-etched plastic part was immersed in an electroless copper plating solution for 2 hours to form a copper layer having a thickness of 17 μm, and immersed in an electroless nickel plating solution for 10 minutes to form a nickel layer having a thickness of 3 μm on the outer surface of the copper layer;
after the chemical plating, the plating layer and the coating were subjected to adhesion test by a cross-hatch method, respectively, and the result was 5B.
2) Preparing a second membrane: same as example 1;
3) and (3) attaching a second membrane and the first membrane to the inner surface of the mobile phone glass rear shell in sequence by using a membrane attaching machine, and then carrying out defoaming treatment by using a defoaming machine to obtain the mobile phone glass rear shell A3 with the antenna membrane.
The mobile phone glass rear shell A3 prepared by the method does not affect the appearance of the original decorative film, has an antenna function, and does not affect the antenna function even if the glass rear shell is broken. Further, no back mark was observed with the naked eye, and the area affected by the back mark was 1.24mm when observed by the above measurement method 3).
Example 4
1) Preparation of the first Membrane
The same procedure as in example 1 was followed, except that the laser-etched plastic part was immersed in an electroless copper plating solution for 3 hours to form a copper layer having a thickness of 25 μm, and immersed in an electroless nickel plating solution for 10 minutes to form a nickel layer having a thickness of 3 μm on the outer surface of the copper layer;
after the chemical plating, the plating layer and the coating were subjected to adhesion test by a cross-hatch method, respectively, and the result was 4B.
2) Preparation of the second Membrane
The procedure was carried out in the same manner as in example 1.
3) And (3) attaching a second membrane and the first membrane to the inner surface of the mobile phone glass rear shell in sequence by using a membrane attaching machine, and then carrying out defoaming treatment by using a defoaming machine to obtain the mobile phone glass rear shell A4 with the antenna membrane.
The mobile phone glass rear shell A4 prepared by the method does not affect the appearance of the original decorative film, has an antenna function, and does not affect the antenna function even if the glass rear shell is broken. Further, although no back mark was observed with the naked eye, the area affected by the back mark was 1.78mm when observed by the above-mentioned measurement method 3).
Example 5
1) Preparation of the first Membrane
The same procedure as in example 1 was followed, except that the laser-etched plastic part was immersed in an electroless copper plating solution for 20min to form a copper layer having a thickness of 4 μm, and immersed in an electroless nickel plating solution for 10min to form a nickel layer having a thickness of 3 μm on the outer surface of the copper layer;
after the chemical plating, the plating layer and the coating were subjected to adhesion test by a cross-hatch method, respectively, and the result was 2B.
2) Preparation of the second Membrane
The procedure was carried out in the same manner as in example 1.
3) And (3) attaching a second membrane and the first membrane to the inner surface of the mobile phone glass rear shell in sequence by using a membrane attaching machine, and then carrying out defoaming treatment by using a defoaming machine to obtain the mobile phone glass rear shell A5 with the antenna membrane.
The mobile phone glass rear shell A5 prepared by the method does not affect the appearance of the original decorative film, has an antenna function, and does not affect the antenna function even if the glass rear shell is broken. Further, although no back mark was visually observed, the area affected by the back mark was 0.15mm when observed by the above-mentioned measurement method 3).
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (17)
1. An antenna diaphragm attached to a shell of an electronic product is characterized in that the antenna diaphragm comprises a first diaphragm and a second diaphragm which are attached to each other,
the first membrane comprises a first substrate and an antenna layer, the antenna layer is formed on one surface of the first substrate, the other surface of the first substrate is attached to the second membrane,
the second membrane comprises a second substrate, an adhesive layer and a decorative layer, wherein the adhesive layer covers one surface of the second substrate, the decorative layer is formed on the other surface of the second substrate, one side of the decorative layer of the second membrane is attached to the first membrane,
wherein the thickness of the antenna layer is 5-30 μm.
2. The antenna diaphragm of claim 1, wherein the antenna layer has a thickness of 8-20 μm.
3. The antenna diaphragm of claim 1, wherein the first diaphragm comprises a first substrate, a first ink layer formed on one side of the first substrate, and an antenna layer at least partially embedded in the first ink layer, and wherein the other side of the first substrate is attached to the second diaphragm;
preferably, the first ink layer contains a resin and a laser-activatable metal oxide dispersed in the resin;
preferably, the laser-activatable metal compound is a compound of formula I,
ABmOn(formula I)
In the formula I, A is one or more of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column of the periodic table of the elements, or A is A1And A2，A1Is one or more than two of metal elements in the 8 th column, the 9 th column, the 10 th column and the 11 th column in the periodic table of elements, A2Is one or more than two elements in the 1 st column and the 2 nd column in the periodic table of elements;
when A contains a metal element in the 8 th column, B is one or more than two elements in the 4 th column, the 6 th column, the 7 th column and the 13 th column in the periodic table of the elements; b is one or more than two elements in the 4 th, 6 th, 7 th, 8 th and 13 th columns of the periodic table when A does not contain the 8 th column metal element;
m is 1 or 2, n is 2, 3 or 4, and m < n;
preferably, the laser-activatable metal compound is CuCr2O4；
Preferably, the resin is one or more of polyurethane resin, epoxy resin, acrylic resin, polyester resin, alkyd resin and drying oil resin;
preferably, the thickness of the first ink layer is 5-100 μm.
4. The antenna film as claimed in claim 3, wherein the antenna layer is formed by irradiating a surface of the first ink layer on which the antenna is to be formed with an energy beam and then performing electroless metal plating.
5. The antenna diaphragm of any one of claims 1-3, wherein the glue layer is an OCA optical glue layer;
preferably, the OCA optical adhesive in the OCA optical adhesive layer is acrylate optical adhesive, epoxy resin optical adhesive, polyurethane optical adhesive, silicone resin optical adhesive or acrylate modified EVA;
preferably, the OCA optical cement in the OCA optical cement layer is acrylate optical cement or acrylate modified EVA;
preferably, the thickness of the glue layer is 3-50 μm.
6. The antenna film of claim 1, wherein the second film further comprises a release film for protecting the glue layer.
7. The antenna film as in claim 1, wherein the second film further comprises a UV transfer glue layer, the UV transfer glue layer being located between the second substrate and the decorative layer;
preferably, the thickness of the UV transfer glue layer is 5-50 μm.
8. The antenna diaphragm of any one of claims 1-3, wherein the material of the first substrate and the second substrate are each one or more of polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and polyimide;
preferably, the material of the first substrate and the second substrate is polyethylene terephthalate;
preferably, the thickness of each of the first substrate and the second substrate is 10 to 200 μm.
9. The antenna film according to any of claims 1-3, wherein the decorative layer is a physical vapor deposition layer or the decorative layer is a physical vapor deposition layer and a second ink layer formed on the physical vapor deposition layer.
10. The antenna film of any of claims 1-3, wherein the first film and the second film are attached by an adhesive layer;
preferably, the thickness of the adhesive layer is 5 to 50 μm.
11. The antenna diaphragm of any one of claims 1-3, wherein the electronics housing is a transparent piece;
preferably, the transparent member is glass.
12. The antenna diaphragm of any one of claims 1-3, wherein a back trace affected area formed when the antenna diaphragm is attached to the electronic product shell is less than or equal to 2mm, and the back trace affected area is a width of a groove-shaped trace formed at the peripheral edge position of the antenna;
preferably, a back mark influence area formed when the antenna diaphragm is attached to the electronic product shell is less than 1.5 mm;
preferably, the back mark influence area formed when the antenna diaphragm is attached to the electronic product shell is 0.25-1.5 mm.
13. A rear case applied to a terminal, wherein the rear case comprises an electronic product housing and the antenna film of any one of claims 1 to 12 attached to the electronic product housing, the antenna film being attached to the surface of the electronic product housing;
preferably, the electronic product shell is a transparent piece; more preferably, the transparent member is glass;
preferably, the terminal is a mobile phone, and the rear shell is a mobile phone rear shell.
14. A rear shell is applied to a terminal and is characterized by comprising an electronic product shell and an antenna membrane attached to the electronic product shell, wherein the antenna membrane comprises a first membrane and a second membrane which are attached to each other,
the first membrane comprises a first substrate and an antenna layer, the antenna layer is formed on one surface of the first substrate, the other surface of the first substrate is attached to the second membrane,
the second membrane comprises a second substrate, an adhesive layer and a decorative layer, wherein the adhesive layer covers one surface of the second substrate, the decorative layer is formed on the other surface of the second substrate, one side of the decorative layer of the second membrane is attached to the first membrane,
wherein the thickness of the antenna layer is 5-30 μm;
preferably, the terminal is a mobile phone, and the rear shell is a mobile phone rear shell.
15. A terminal, characterized in that it comprises a terminal body and a rear shell according to claim 13 or 14.
16. A method for manufacturing a terminal rear shell, characterized in that the antenna film attached to the electronic product shell as claimed in any one of claims 1 to 12 is attached to the surface of the electronic product shell.
17. Use of the antenna film of any one of claims 1-12 attached to a housing of an electronic product in the manufacture of a terminal;
preferably, the antenna film attached to the shell of the electronic product is applied to the preparation of the rear shell of the mobile phone.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021249424A1 (en) * | 2020-06-09 | 2021-12-16 | 中兴通讯股份有限公司 | Rear cover assembly, terminal device and method for manufacturing rear cover assembly |
| CN114726935A (en) * | 2020-12-22 | 2022-07-08 | 华为技术有限公司 | Electronic equipment |
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| CN114726935A (en) * | 2020-12-22 | 2022-07-08 | 华为技术有限公司 | Electronic equipment |
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| CN111180875B (en) | 2022-02-08 |
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