WO2020145423A1 - 모바일 디바이스의 케이스 및 이의 코팅방법 - Google Patents
모바일 디바이스의 케이스 및 이의 코팅방법 Download PDFInfo
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- WO2020145423A1 WO2020145423A1 PCT/KR2019/000284 KR2019000284W WO2020145423A1 WO 2020145423 A1 WO2020145423 A1 WO 2020145423A1 KR 2019000284 W KR2019000284 W KR 2019000284W WO 2020145423 A1 WO2020145423 A1 WO 2020145423A1
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- case
- case frame
- mobile device
- metal
- coating layer
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0084—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition
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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
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1635—Composition of the substrate
- C23C18/1639—Substrates other than metallic, e.g. inorganic or organic or non-conductive
- C23C18/1641—Organic substrates, e.g. resin, plastic
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1806—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by mechanical pretreatment, e.g. grinding, sanding
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/2006—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/2006—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30
- C23C18/2046—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by chemical pretreatment
- C23C18/2073—Multistep pretreatment
- C23C18/208—Multistep pretreatment with use of metal first
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/285—Sensitising or activating with tin based compound or composition
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/30—Activating or accelerating or sensitising with palladium or other noble metal
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/38—Coating with copper
- C23C18/40—Coating with copper using reducing agents
- C23C18/405—Formaldehyde
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/42—Coating with noble metals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3888—Arrangements for carrying or protecting transceivers
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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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0086—Casings, cabinets or drawers for electric apparatus portable, e.g. battery operated apparatus
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/04—Metal casings
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1689—After-treatment
- C23C18/1692—Heat-treatment
Definitions
- the present invention relates to a case of a mobile device and a coating method thereof, and more particularly, as a case of a mobile phone and a communication device, a mobile device having light, high strength, and improved electromagnetic shielding ability It relates to a case and a coating method thereof.
- a plastic housing typified by polycarbonate (refer to the right figure in FIG. 1) has been frequently used.
- a housing of a smartphone made of high-strength aluminum (see the left figure in FIG. 1) is widely used to fix a display of 5 inches or more.
- such an aluminum housing such as a smart phone case has a problem in that productivity is very low and production price is high because it is manufactured by cutting one by one using a CNC processing machine.
- the metal housing represented by such aluminum is manufactured by processing aluminum ingots by lathe milling and a CNC device. Most mobile phone makers manufacture and use these metal housings from external contractors.
- the largest mobile phone maker in Korea has built a manufacturing plant in Vietnam, and it is known that it takes about 40 minutes to produce one metal housing. In particular, it is necessary to install a large number of processing equipment or to secure a large number of subcontractors to manufacture a large number of housings.
- the electromagnetic wave shielding coating method of a conventional electronic device vacuum metal deposition (Vacuum Metalizing) for depositing a metal on a coated object in a vacuum
- conductive paint coating method for spraying a liquid containing a metal powder onto the coated object
- Paint Spray Electroless Plating
- a coating material is plated inside a plating bath.
- the conductive paint coating method is mainly used by domestic manufacturers, and it is known that some foreign companies such as Nokia use electroless plating method using polymer alloy as a material.
- the vacuum metal deposition method is a method that was frequently used in the early stages of the production of mobile phones, and is rarely used at present because of its low productivity, high price, and problems with adhesion to materials.
- Plating method is used.
- the technical problem to be achieved by the present invention is provided on the inside and outside of a mobile phone and a communication device, and has the advantages of plastic and metal, and is a case of a mobile device having light, high strength, improved electromagnetic shielding ability, and a unique color. And to provide a coating method thereof.
- an embodiment of the present invention provides a substrate and a case of a mobile device that accommodates or wraps an electronic device provided on the substrate.
- the case of the mobile device is made of a polymer material containing a resin, a case frame having a cover portion for receiving or covering the substrate, and a protruding portion extending sideways of the electronic element from the cover portion; And a metal coating layer formed of metal on the surface of the case frame including the protrusions to improve electromagnetic wave shielding ability.
- the metal coating layer contains any one of copper, silver, nickel, chromium, cobalt, and compounds thereof, and may have a thickness of 5 to 100 ⁇ m.
- the case may include an antenna protection area around the antenna of the mobile device, and an antenna protection area in which the metal coating layer is omitted for smooth transmission and reception of radio waves.
- another embodiment of the present invention provides a method for coating a case of a mobile device that accommodates or wraps a substrate and an electronic device provided on the substrate.
- a case frame made of a polymer material containing a resin, and having a cover portion for accommodating or covering the substrate and a protruding portion extending laterally from the cover portion to the electronic device to provide.
- the case frame is thermally dried to remove cleaning agents and moisture from the surface of the case frame.
- the surface of the heat-dried case frame is subjected to low-temperature plasma treatment to introduce a polar functional group to enable plating of the surface of the case frame.
- the surface of the low-temperature plasma-treated case frame is subjected to catalytic treatment and activation treatment for subsequent processes.
- a metal coating layer is formed on the surface of the case frame by electroless plating.
- the adhesion improving process for improving the adhesion between the case frame and the metal coating layer You can do more.
- a mobile phone and a communication device it is provided on the inside and the outside of a mobile phone and a communication device, and has the advantages of plastic and metal, and is a case of a mobile device having a light, high strength, and improved electromagnetic shielding ability and a unique color And coating methods thereof.
- FIG. 1 is a view showing a case of a mobile device manufactured by injecting plastic and a mobile device case CNC-processed aluminum.
- FIG. 2 is a view showing a case of a mobile device according to an embodiment of the present invention.
- FIG 3 is a view for explaining a case of a mobile device according to an embodiment of the present invention.
- FIG. 4 is a flowchart illustrating a method of coating a case of a mobile device according to an embodiment of the present invention.
- 5 and 6 are diagrams showing case counterparts used to measure electromagnetic wave shielding ability.
- 7(a) and 7(b) are views for explaining a method for measuring electromagnetic wave shielding ability.
- FIG. 1 is a view showing a case of a mobile device manufactured by injecting plastic and a mobile device case CNC-processed aluminum.
- Aluminum has limitations in micromachining because it is limited by the shape and size of the machining tool during CNC machining. However, since plastics are injection molded in a semi-melted state, it is possible to mold even minute parts that are not possible with CNC machining.
- FIG. 2 is a view showing a case 100 of a mobile device according to an embodiment of the present invention.
- 3 is a view for explaining a case 100 of a mobile device according to an embodiment of the present invention.
- the case 100 of the mobile device may mean both a protective case used as an outer portion of a mobile device such as a smartphone and a tablet PC, and a housing surrounding and protecting the internal parts.
- the case 100 (hereinafter, the case) of the mobile device may accommodate or wrap the substrate 210 and the electronic device 230 provided on the substrate.
- the case 100 may be combined with the display of the mobile device with the substrate 210 interposed therebetween.
- the case 100 may include a case frame 110 and a metal coating layer 130 coated on the case frame 110.
- the case frame 110 may be made of a polymer material containing resin.
- the case frame 110 may have a cover portion 111 that accommodates or covers the substrate 210 and a protruding portion 113 extending sideways of the electronic device 230 from the cover portion 111.
- the protrusion 113 may be positioned around the electronic device 230 requiring electromagnetic shielding as illustrated in FIG. 3, surround the electronic device 230, or may be in close contact with the electronic device 230.
- the protrusion 113 is formed integrally with the case frame 110, or after the formation of the case frame 110, the processing method of attaching the protrusion 113 to the case frame 110 or deforming the case frame 110 It may be formed by.
- the metal coating layer 130 may be formed by coating a metal on the surface of the case frame 110 including the protrusions 113.
- the metal coating layer 130 may contain any one of copper, silver, nickel, chromium, cobalt, and compounds thereof, and may have a thickness of 5-100 ⁇ m.
- the metal coating layer 130 may be formed on most surfaces except for the entire surface or a part of the case 100.
- the case 100 includes a case frame 110 made of a polymer material such as resin, and thus may have various advantages of the polymer material.
- Polymer materials including polymers are mainly composed of organic molecules synthesized into long chains.
- the high molecular weight and molecular bonding of these polymers creates unique properties. These unique properties include toughness, elasticity, low density, high melting point and low melting point, forming ability, electrical resistance and many other properties that vary from a very wide range.
- the molding ability of the polymer material is very good, and since the formation of the metal coating layer 130 can be performed in large quantities at one time, compared to the method of producing aluminum cases one by one by processing the aluminum block by CNC method, superior productivity Can have
- the case 100 has a significantly improved stiffness due to the metal coating layer 130, excellent durability, and particularly, electromagnetic wave shielding ability is significantly improved.
- the metal coating layer 130 has a unique metal color, various designs can be selected.
- metal coating layers 130 may be formed to be stacked to improve electromagnetic wave shielding ability and mechanical properties.
- Table 1 shows the results of comparing the effects of various electromagnetic shielding methods.
- the method using electroless plating since the method using electroless plating has the largest electromagnetic shielding effect, it is possible to shield electromagnetic waves with a thin coating thickness.
- the thickness of the coating layer required for electromagnetic shielding is 2 to 2.5 microns in electroless plating, and 50 to 75 microns in the case of conductive coatings.
- FIG. 4 is a flowchart illustrating a method of coating a case 100 of a mobile device according to an embodiment of the present invention.
- the case 100 of the mobile device that accommodates or wraps the substrate 210 and the electronic device 230 provided on the substrate 210
- it is made of a polymer material containing a resin to accommodate the substrate 210
- It provides a case frame 110 having a cover portion 111 to cover or cover, and a protruding portion 113 extending from the cover portion 111 to the side of the electronic device 230 (S10).
- the case frame 110 may be thermally dried to perform a heat drying process to remove the cleaning agent and moisture on the surface of the case frame 110 (S20).
- the surface of the case frame 110 that is heat-dried is subjected to a low temperature plasma treatment to introduce a polar functional group to enable plating of the surface of the case frame 110 (S30).
- the surface of the low-temperature plasma-treated case frame 110 may be subjected to catalytic treatment and activation treatment for subsequent processes (S40).
- a metal coating layer 130 is formed by plating metal on the surface of the case frame 110 by an electroless plating method (S50).
- the case frame 110 is provided (S10).
- the case frame 110 may be a frame having a shape combined with a display of a mobile device as shown in FIGS. 2 and 3(a).
- the case frame 110 may be made of a polymer material including resin or polymer.
- the case frame 110 may have a cover portion 111 that accommodates or covers the mobile device substrate 210 and a protruding portion 113 extending laterally from the cover portion 111 to the electronic device 230.
- the case frame 110 may be formed by injecting resin or plastic, stamping it on a mold, or 3D printing.
- the protrusion 113 is formed integrally with the case frame 110, or after the formation of the case frame 110, the processing method of attaching the protrusion 113 to the case frame 110 or deforming the case frame 110 It may be formed by.
- inspection and washing can be carried out.
- the contaminants such as fingerprints, dust, and organic substances can be visually inspected and ultrasonic cleaning can be performed using an ultrasonic cleaner.
- heat drying may be performed (S20).
- the cleaning agent on the surface of the case frame 110 is removed by hot air in the oven, and moisture absorbed in the cleaning process is removed, thereby preventing a process pressure drop in the post process due to moisture and gas.
- the surface of the case frame 110 may be subjected to low temperature plasma treatment to introduce a polar functional group (S30).
- a hydrophilic functional group is introduced on the surface of the case frame 110 by a low-temperature plasma to change to a structure capable of plating.
- the contact angle of H 2 O on the surface of the case frame 110 is greatly reduced, and preferably, the contact angle between 10-50° is maintained, thereby plating the metal to be followed.
- the effectiveness of the process can be improved.
- a polar functional group may be generated on the surface, but it must be considered that the processing cost is high because it must be operated under a high vacuum. Therefore, the use of a cold plasma operated in a low vacuum, especially near 10 Torr, can generate polar functional groups on the surface at a much lower cost.
- the generation of the polar functional group can be confirmed immediately by measuring the contact angle of H 2 O on the surface of the treated case frame 110 or irradiating a hydroxy group or a carbonyl group with an infrared absorption spectroscopy.
- the degree of functional group generation can be appropriately adjusted to the type of metal to be plated or the required film thickness.
- Polymeric materials commonly referred to as plastics, are materials with strong hydrophobicity, although they differ according to the constituent elements of the monomer.
- a metal thin film can be prepared by an electroless plating method using a reducing agent.
- the case frame 110 to be processed using low temperature plasma
- the temperature of the glass transition point (Tg) or less preferably, the plasma treatment is performed in a state in which the temperature in the vacuum chamber is 50°C or less.
- plasma by mixing one or two or more selected from the group consisting of low concentrations of air, acetone, water, acetaldehyde, formalin, acrylic acid, oxygen, nitrogen, argon and hydrogen.
- the case frame 110 to which the application is applied is PEEK, PPS polyphenylene sulfide, PTFE fluorine resin, PI polyimide, epoxy resin, and these materials
- PEEK PPS polyphenylene sulfide
- PTFE fluorine resin PTFE fluorine resin
- PI polyimide PI polyimide
- epoxy resin epoxy resin
- the polarized case frame (110) After generating a hydrophilic functional group on the surface of the case frame 110 using a low-temperature plasma or ion implantation method containing a reactive gas, the polarized case frame (110)
- the basic principle is to adsorb a noble metal catalyst metal on the surface and to deposit a metal with a reducing agent without flowing electricity in a state in which metal ions to be plated are concentrated.
- catalytic treatment and activation treatment may be performed (S40).
- the case frame 110 plasma-treated in a mixed solution of a catalytic additive eg, palladium chloride (PdCl 2 ) 0.1 to 100 g/l
- stannous chloride (SnCl 2 ) for 0.1 to 100 g/l is deposited for 5 minutes.
- an activation process may be performed.
- the catalyzed case frame 110 is washed three times after 3 minutes of activation treatment at a temperature of 15-50°C in a 50-60% hydrochloric acid solution.
- the electroless plating method heating is performed for activation of the reducing agent, but since the polymer material is difficult to heat, a catalyst can be used as described above.
- the palladium ion is easily reduced to a metal state by a reducing agent, and has an advantage of providing activated hydrogen required for reduction of thin film-forming materials such as copper. Sn added so that palladium ions are well exposed is removed by washing with a weak acid solution (hydrochloric acid solution described above).
- the case frame 110 after introducing a hydrophilic functional group to the surface of the case frame 110 by low temperature plasma treatment, and after immersing the case frame 110 in a catalyst, after washing with hydrochloric acid, the case frame with a detergent or ultrasonic cleaner A process of cleaning 110 may be further included. By adding this process, the hydrophilic functional group introduced on the surface of the case frame 110 can be trimmed, whereby the effect of metal film plating in a subsequent process can be further improved.
- the metal coating layer 130 may be formed by an electroless plating method (S50).
- the activated case frame 110 is immersed in an electroless copper plating solution containing copper sulfate, formalin, caustic soda, EDTA, sodium bicarbonate, etc. for 60 minutes, plated, and then washed three times.
- a metal coating layer 130 made of copper may be formed on the surface of the case frame 110.
- the case frame 110 may be metal coated with both the cover portion 111 and the protrusion portion 113.
- the metal coating layer 130 to be plated may be a copper film, a nickel film, a chromium film or a film of a precious metal such as gold or silver, or an alloy or composite film of such a metal.
- the metal coating layer 130 may not be formed in the protection region 150.
- the metal coating layer 130 may have superior electromagnetic shielding properties than light metals such as aluminum.
- an adhesion improvement process may be performed (S60).
- a process of heating for 5 minutes to 200 minutes at a temperature below the softening point of the polymer material that is the material of the case frame 110 may be further performed.
- adhesion between the case frame 110 and the metal coating layer 130 may be improved.
- the case 100 having the case frame 110 coated with the metal coating layer 130 according to this embodiment contributes to reducing mass while improving mechanical performance. That is, it provides high strength compared to the weight ratio. Therefore, it is very strong against external shock compared to the weight ratio. In addition, as described above, the electromagnetic wave shielding ability can be significantly improved.
- the metal coating layer 130 is used with the necessary functions, or, depending on the needs of additional functions, secondary plating, tertiary plating, or the like is possible.
- a wet electric plating solution may be used so that a metal layer suitable for the purpose of use is plated on the outermost surface of the case frame 110.
- the outermost surface layer may be plated with a high-density, high-corrosion-resistant metal such as nickel or chromium, or may be formed with a metal plating solution of a specially formulated color.
- the case 100 of the mobile device obtained by the above-described process is a metal coating layer 130, and a copper layer with a thickness of about 8 microns or more may be formed in a dense structure.
- 5 and 6 are diagrams showing case counterparts used to measure electromagnetic wave shielding ability.
- 7(a) and 7(b) are views for explaining a method for measuring electromagnetic wave shielding ability.
- the electromagnetic wave shielding ability in the measurement laboratory was immediately determined for the case (upper figure) of the experimental example in which the metal coating layer 130 was formed on the surface of the case frame 110 formed of plastic.
- the reference value was first measured.
- the distance of the end point of the antenna was measured as shown in FIG. 7(a) with a transmit-receive antenna based on a height of 1.1 m while maintaining a distance of at least 30 cm from the ground and the bottom surface to determine a reference value.
- the ⁇ monopole antenna module used as an RF signal generator is a 5V battery-operated module with built-in VCO & PLL and amplifier, and the antenna length is set to 75mm to measure the reference value without a case or housing.
- an aluminum housing, a plastic housing, and a metal coating layer 130 are formed, respectively, in a case corresponding to the case 100 of the case ⁇ A monopole receiving antenna was placed, a receiving antenna was installed at a predetermined location outside, and the shielding effect was tested.
- Electromagnetic shielding effect according to material material Aluminum alloy plastic Plastic + Cu plating Plastic + Ag plating Electromagnetic shielding ability (-dB) -66 0 -85 -100 importance 2.7 1.34 1.39 1.40 Weight (g) 1,871 930 961 975 Recipe Die casting ejaculation Injection + plating Injection + plating
- the case of the mobile device according to this embodiment is about half the weight compared to the aluminum housing, but the electromagnetic shielding performance is improved by about 1.3 times (85/66) to 1.5 times (100/66). .
- the weight is almost similar to that of the plastic housing, when the electromagnetic shielding ability of the plastic housing is set to 0, it can be seen that the case of this embodiment has improved electromagnetic shielding ability of about 85 to 100.
- the strength increase by the metal coating layer was tested to obtain the results shown in Table 3 below.
- the strength of the case of the mobile device can be significantly increased by coating the low-strength plastic with a high-strength metal alloy.
- the strength can be further increased by increasing the hardness of the metal alloy to be coated or increasing the thickness of the metal coating layer.
- the case surrounding the inside and the outside of the product of the mobile phone and the communication device with plastic, and coating the conductive high-strength metal it is possible to manufacture a case having the lightness of the metal, the shielding ability of electromagnetic waves and a unique color .
- the injection molding process and the metal plating process it is possible to significantly reduce the manufacturing cost compared to the existing aluminum housing, as well as to reduce the weight and thickness of the housing and significantly improve the electromagnetic shielding characteristics.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Signal Processing (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Inorganic Chemistry (AREA)
- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Casings For Electric Apparatus (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
코팅기술 | 코팅소재 | 차폐효과(dB) | 접점충전 | 요철부균일성 | 두께차폐효과 | 두께균일성 | 내식성내구성 | 밀착성 |
무전해도금 | CuNi | 80-110 | ○ | ◎ | ◎ | ◎ | ◎ | ○ |
진공도금 | Al | 60-80 | △ | △ | △ | △ | ○ | △ |
전도성페인트코팅 | Ni | 40-60 | × | △ | △ | △ | ○ | ○ |
Cu | 50-70 | △ | △ | △ | △ | △ | ○ | |
Ag | 70-80 | △ | △ | △ | △ | △ | ○ |
재질 | 알루미늄합금 | 플라스틱 | 플라스틱+Cu도금 | 플라스틱+Ag도금 |
전자파 차폐능 (-dB) | -66 | 0 | -85 | -100 |
비중 | 2.7 | 1.34 | 1.39 | 1.40 |
무게 (g) | 1,871 | 930 | 961 | 975 |
제조법 | 다이케스팅 | 사출 | 사출+도금 | 사출+도금 |
경도(Hv) | 인장강도 (N/mm2) | 비고 |
500 | 1,700 | 합금의 비중 :Ni-P 7.9Ni-B 8.6Cr합금 7.5 |
600 | 2,150 | |
700 | 2,500 | |
800 | 2,900 | |
900 | 3,300 |
두께 | 인장강도 | |
최대점응력 (N/mm2) | 파단점 응력 (N/mm2) | |
2mm | 24.0175 | 23.0561 |
3mm | 30.2571 | 29.0415 |
4mm | 29.6829 | 25.9814 |
5mm | 27.1333 | 26.7841 |
Claims (5)
- 기판과 상기 기판에 구비된 전자소자를 수용하거나 감싸는 모바일 디바이스의 케이스에 있어서,수지를 포함하는 고분자소재로 이루어져 상기 기판을 수용하거나 커버하는 커버부와, 상기 커버부로부터 상기 전자소자의 옆으로 연장된 돌출부를 가지는 케이스 프레임; 그리고상기 돌출부를 포함한 상기 케이스 프레임의 표면에 금속으로 형성되어 전자파 차폐능을 향상시키는 금속코팅층;을 포함하는 것을 특징으로 하는 모바일 디바이스의 케이스.
- 제1항에 있어서,상기 금속코팅층은 구리, 은, 니켈, 크롬, 코발트, 및 이들의 화합물중 어느 하나를 함유하며, 두께가 5 - 100㎛인 것을 특징으로 하는 모바일 디바이스의 케이스.
- 제1항에 있어서,상기 케이스는 상기 모바일 디바이스의 안테나의 주변의 안테나 보호영역으로서, 전파의 송수신 원활을 위해 상기 금속코팅층이 생략된 안테나 보호영역;을 구비하는 것을 특징으로 하는 모바일 디바이스의 케이스.
- 기판과 상기 기판에 구비된 전자소자를 수용하거나 감싸는 모바일 디바이스의 케이스의 코팅방법에 있어서,수지를 포함하는 고분자소재로 이루어지고, 상기 기판을 수용하거나 커버하는 커버부와, 상기 커버부로부터 상기 전자소자의 옆으로 연장된 돌출부를 가지는 케이스 프레임을 제공하는 단계;상기 케이스 프레임을 열건조하여 상기 케이스 프레임의 표면의 세척제 및 수분을 제거하는 연건조 단계;열건조된 케이스 프레임의 표면을 저온 플라즈마처리하여 상기 케이스 프레임의 표면을 도금이 가능하도록 극성 관능기를 도입하는 저온 플라즈마처리 단계;저온 플라즈마처리된 케이스 프레임의 표면을 후속공정을 위한 촉매처리 및 활성화 처리하는 단계; 그리고무전해도금법으로 상기 케이스 프레임의 표면에 금속층을 형성하는 금속코팅층 형성단계;를 포함하는 것을 특징으로 하는 모바일 디바이스의 케이스의 코팅방법.
- 제4항에 있어서,금속코팅층을 형성하는 단계 이후, 상기 고분자소재의 연화점 이하 온도로 5분∼200분간 가열하여 가스를 제거함으로써, 상기 케이스 프레임과 상기 금속코팅층 간의 접착력을 향상시키는 접착력 향상단계;를 더 포함하는 것을 특징으로 하는 모바일 디바이스의 케이스의 코팅방법.
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US17/253,489 US20210266026A1 (en) | 2019-01-08 | 2019-01-08 | Mobile device case and method for coating same |
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KR1020190002282A KR102165360B1 (ko) | 2019-01-08 | 2019-01-08 | 모바일 디바이스의 케이스 및 이의 코팅방법 |
KR10-2019-0002282 | 2019-01-08 |
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TWI333450B (en) * | 2007-12-13 | 2010-11-21 | Wistron Neweb Corp | Disassembling tool and method for assisting removal of a circuit board from a housing, and assembly of the circuit board, the housing and the disassembling tool |
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DE102015117652A1 (de) * | 2015-10-16 | 2017-04-20 | Kunststofftechnik Bernt Gmbh | Metallisiertes Kunststoffbauteil mit durchleuchtbarer Struktur im Tag- und Nachtdesign; Verfahren zur Herstellung des Kunststoffbauteils |
US20190230203A1 (en) * | 2018-01-25 | 2019-07-25 | Guangdong Oppo Mobile Telecommunication Corp., Ltd. | Frame assembly, housing and electronic device having the same |
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2019
- 2019-01-08 KR KR1020190002282A patent/KR102165360B1/ko active IP Right Grant
- 2019-01-08 US US17/253,489 patent/US20210266026A1/en active Pending
- 2019-01-08 WO PCT/KR2019/000284 patent/WO2020145423A1/ko active Application Filing
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KR20040078993A (ko) * | 2003-03-05 | 2004-09-14 | 주식회사 피앤아이 | 전자기기용 플라스틱 하우징 |
KR20050120435A (ko) * | 2004-06-18 | 2005-12-22 | 주식회사 파인어스 | 전자파 차폐 구조를 가지는 전기전자제품의 커버 |
KR20090103949A (ko) * | 2007-01-19 | 2009-10-01 | 바스프 에스이 | 구조화된 전기 전도성 표면을 제조하기 위한 방법 |
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KR20190000953A (ko) * | 2017-06-23 | 2019-01-04 | 네덱 주식회사 | 케이스 및 이의 제작방법 |
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US20210266026A1 (en) | 2021-08-26 |
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