US20160208388A1 - Metal member and manufacturing method therefor - Google Patents
Metal member and manufacturing method therefor Download PDFInfo
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- US20160208388A1 US20160208388A1 US15/080,931 US201615080931A US2016208388A1 US 20160208388 A1 US20160208388 A1 US 20160208388A1 US 201615080931 A US201615080931 A US 201615080931A US 2016208388 A1 US2016208388 A1 US 2016208388A1
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- passivation
- layer
- base layer
- solution
- structural pattern
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/02—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using non-aqueous solutions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
Definitions
- the present invention relates to a metal member applied to an outer case, a housing or the like (hereinafter, referred to as a “main body”) of mobile phones, notebook computers and various electronic apparatuses, and more particularly, to a metal member that can improve corrosion resistance and fingerprint resistance and can shield electromagnetic waves, as well as imparts a metallic texture to metal materials that is prone to a surface oxidation, such as magnesium, magnesium alloy, aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver and silver alloy (hereinafter, referred to as a “metal”) through surface treatments such as a protective layer and an fingerprint prevention layer including a passivation layer.
- a surface oxidation such as magnesium, magnesium alloy, aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver and silver alloy
- magnesium and magnesium alloy material are lightweight, have excellent electromagnetic wave shielding and have excellent heat dissipation, they are widely used over wide fields such as computers, laptop computers, cameras, mobile phones, automobiles and aircraft, including various electronic products and electronic equipment.
- Korean Patent Laid-Open No. 2002-0077150 (Oct. 11, 2002) entitled “magnesium alloy chemical conversion treatment solution, surface treatment method and magnesium alloy substrate” (referred to as a “Document 1”) has already been widely known.
- the chemical conversion treatment liquid should be preferred in the range from pH 2.0 to 4.0 that is a strong acid treatment conditions, for example, when pH of the chemical conversion treatment solution exceeds 7, an amount of film deposition is extremely low due to the reduction of the oxidizing power of the permanganate ion, the reproduction reliability of the film is degraded, and thus, there are problems in which it is not possible to obtain sufficient corrosion resistance and coating adhesiveness.
- An embodiment of the present invention is directed to provide a metal member that is capable of improving corrosion resistance or the like on a base layer provided as a metal that is prone to a surface oxidation through a surface treatment formed with a passivation layer and a protective layer.
- another embodiment of the present invention is directed to form a structural pattern of various shapes on a surface of a base layer to be able to impart metallic texture.
- Still another embodiment of the present invention is directed to form a fingerprint prevention layer of the base layer in the metal member of the present invention to be able to prevent staining of marks such as a fingerprint or oil of a human body.
- Still another embodiment of the present invention is directed to a metal member made of a conductive material to be able to shield electromagnetic waves generated from various electronic devices to protect the human body.
- a structural pattern formed on one surface of the base layer is configured.
- the passivation layer formed on the structural pattern and a protective layer formed on the passivation layer as a coated film are constituted.
- the metal member is configured to include a passivation layer that faces the protective layer and formed on the other surface of the base layer.
- a structural pattern formed on one surface of the base layer is constituted.
- a passivation layer formed on the structural pattern and a protective layer formed on the passivation layer are constituted.
- a fingerprint prevention layer formed on the protective layer is constituted.
- the metal member includes a passivation layer that faces the fingerprint prevention layer and formed on the other surface of the base layer.
- a passivation layer formed on the structural pattern may be constituted.
- a passivation layer that faces the passivation layer and is formed on the other surface of the base layer is constituted.
- the metal member is configured to include a protective layer formed on the passivation layer.
- a structural pattern formed on one surface of a base layer is constituted.
- a passivation layer formed on the structural pattern is constituted.
- a passivation layer that faces the passivation layer and is formed on the other surface of the base layer is constituted.
- the metal member includes a protective layer formed on the passivation layer and a fingerprint prevention layer formed on the protective layer formed over the structural pattern.
- a method for manufacturing a metal member that includes a step of forming a structural pattern on a surface of a base layer.
- the method further includes a step of forming a passivation layer by a reaction with the passivation solution, in a state of immersing the base layer in a passivation solution heated to a passivation treatment heat temperature.
- the method further includes a step of forming a protective layer for protecting the structural pattern on the passivation layer.
- a method for manufacturing a metal member that includes a step of forming a structural pattern on a surface of a base layer.
- the method further includes a step of forming a passivation layer by a reaction with the passivation solution, in a state of immersing the base layer in a passivation solution heated to a passivation treatment heat temperature.
- the method further includes a step of forming a protective layer for protecting the structural pattern over the passivation layer, and a protective layer on the other surface that is not formed with the structural pattern.
- the present invention provides an effect of improving corrosion resistance or the like on a passivation layer provided as a metal prone to a surface oxidation, through a surface treatment formed with a passivation layer and a protective layer.
- the present invention provides an effect of enhancing a quality of a design of a product, by forming structural patterns of various shapes on the surface of the base layer to impart a metallic texture.
- the present invention provides an effect of always maintaining a clean surface state, by preventing fingerprint or oil of a human body from remaining through the fingerprint prevention layer formed on the base layer.
- the present invention provides another advantage of being able to protect the human body from the electromagnetic waves, by shielding the electromagnetic waves generated from various electronic devices, in a case of attaching a conductive metal member to the outer surface of the main body.
- FIG. 1 is a diagram of one embodiment illustrated schematically a state in which a metal member according to the present invention is applied.
- FIG. 2 is a diagram schematically illustrating a first embodiment of a structural pattern formed on a surface of the base layer in FIG. 1 according to the present invention.
- FIG. 3 is a diagram schematically illustrating a second embodiment of a structural pattern formed on a surface of a base layer in FIG. 1 according to the present invention.
- FIG. 4 is a diagram schematically illustrating a third embodiment of a structural pattern formed on a surface of the base layer in FIG. 1 according to the present invention.
- FIG. 5 is a diagram schematically illustrating a fourth embodiment of a structural pattern formed on the surface of the base layer in FIG. 1 according to the present invention.
- FIG. 6 is a diagram of a first embodiment schematically illustrating a manufacturing process of a metal member according to the present invention.
- FIG. 7 is a diagram of a second embodiment schematically illustrating a manufacturing process of the metal member according to the present invention.
- FIG. 8 is a diagram of a third embodiment schematically illustrating a manufacturing process of the metal member according to the present invention.
- FIG. 9 is a diagram of a fourth embodiment schematically illustrating a manufacturing process of the metal member according to the present invention.
- FIGS. 1 to 9 The present invention will be described in detail below with reference to the attached drawings illustrated in FIGS. 1 to 9 .
- a metal member 100 according to the present invention is provided to include a metallic material such as aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver and silver alloy (hereinafter, referred to as a “metal”), including magnesium, magnesium alloy or the like that is prone to a surface oxidation.
- a metallic material such as aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver and silver alloy (hereinafter, referred to as a “metal”), including magnesium, magnesium alloy or the like that is prone to a surface oxidation.
- the metal member 100 imparts a metallic texture, improves a corrosion resistance, a salt resistance, a corrosion resistance, a paint adhesion, a fingerprint resistance and the like, and further can shield electromagnetic waves, by forming protective layers 130 and 130 a and a fingerprint prevention layer 140 including passivation layers 120 and 120 a (which is also referred to as a “passivation”) on a base layer 100 a (which is also referred to as a “basic material layer”) provided by various ways such as a die casting, injection, extrusion, rolling, pressing or polishing, by utilizing the aforementioned metal material.
- the base layer 100 a is magnesium (Mg) alone or is configured to include at least any one or more selected magnesium alloy among Al, Cu, Ti, Ag, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca, Li and Be in magnesium (Mg).
- the base layer 100 a is aluminum (Al) alone or is configured to include at least any one or more selected aluminum alloys among Mg, Cu, Ti, Ag, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca, Li and Be in aluminum (Al).
- the base layer 100 a is copper (Cu) alone or is configured to include at least any one or more selected copper alloys among Mg, Al, Ti, Ag, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca, Li and Be in copper (Cu).
- the base layer 100 a is titanium (Ti) alone or is configured to include at least any one or more selected titanium alloys among Mg, Al, Cu, Ag, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca, Li and Be in titanium (Ti).
- the base layer 100 a is silver (Ag) alone or is configured to include at least any one or more selected silver alloys among Mg, Al, Cu, Ti, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca Li and Be in silver (Ag).
- a thickness t 1 of the base layer 100 a is constituted by 0.02 to 6 mm.
- the thickness t 1 of the base layer 100 a is too thin below 0.02 mm, there is also a difficulty in formation of a structural pattern 102 and passivation layers 120 and 120 a to be described below, including a difficulty in a thin film processing through etching or the like. Meanwhile, when the thickness is thicker than 6 mm, although the workability is easy, the weight increases, and this may become a factor that unnecessarily increases a required amount of material.
- the thickness t 1 is desirably set to approximately 2 mm, depending on the usage purpose and application, including the chemical and physical properties and the workability of the metal material. Furthermore, in the present invention, it is desirable to further include a thinner or thicker thickness in the range of 0.02 to 6 mm.
- the surface treatment technique is becomes more important than anything.
- the present invention is provided in an external case, a housing (hereinafter, referred to as a “main body”) or the like in mobile phones, notebook computers and various electronic devices, by synthetic resin, urethane, rubber resin or the like.
- the metal member 100 is provided through an adhesive layer 150 serving as an attaching means such that the passivation layer 120 a is in contact with the outer surface of the main body 200 described above as illustrated in FIG. 7 or the metal member 100 is provided through an adhesive layer 150 serving as an attaching means such that a protective layer 130 a is in contact with the outer surface as illustrated in appended FIG. 9 .
- the metal member 100 of the present invention may also be configured so that the passivation layer 120 a or the protective layer 130 a is in contact with the outer surface, by locking means such as a boss, a rib or a hook provided in the main body 200 , and it is a matter of course that the main body 200 should not be limited to the aforementioned materials.
- the present invention is characterized by various structural patterns 102 formed on one surface 101 of a base layer 100 a provided on the metal member 100 , and the structural pattern 102 means formation and visual expression such as hairline 102 a , a graphic 102 b , an image 102 c and a logo 102 d by physical and chemical means.
- the aforementioned structural pattern 102 may be configured to include a hairline 102 a in which mountain sections 102 - 1 and valley sections 102 - 2 are successively formed at identical or non-identical periods as illustrated in FIG. 2 .
- the hairline 102 a is characterized in that the mountain sections 102 - 1 and the valley sections 102 - 2 are formed at the cycles of 10 to 400 within an interval L 1 of 1 cm.
- the mountain sections 102 - 1 and the valley sections 102 - 2 are formed at 400 cycles or more within the interval L 1 of 1 cm, that is, when the number of mountain sections 102 - 1 or valley sections 102 - 2 are tightly formed by 200 or more, although the metallic texture, the design and the refinement are excellent, because this case may act as a factor that increases the time and the cost for polishing or machining them, it is desirable to form the mountain sections and the valley sections substantially at the 200 cycles within the interval L 1 of 1 cm in consideration of these points. However, it is more desirable to form the mountain sections and the valley sections at the 10 to 400 cycles in the present invention.
- the structural pattern 102 may include a configuration in which one or more FIG. 102 b having the identical or non-identical dimensions are formed to be disposed on the surface 101 of the base layer 100 a by combination of concavity 102 - 3 and concavity 102 - 4 .
- the FIG. 102 b may includes various kinds of FIG. 102 b such as a circular shape, a triangular shape, a square shape, a pentagonal shape, a hexagonal shape and a diamond shape, and naturally should not be limited to the FIG. 102 b described above.
- FIG. 102 b is characterized in that four to four hundreds parts of the concavity 102 - 3 or the convexity 102 - 4 are formed in 1 cm 2 .
- the structural pattern 102 may include a configuration in which one or more images 102 c are formed to be disposed on the surface 101 of the base layer 100 a by a combination of the concavity 102 - 3 and the convexity 102 - 4 .
- the image 102 c may include insects such as butterflies and bees, including plants, such as flowers, leaves and trees, and may also include animals such as dogs and pigs, persons, portraits or the like.
- insects such as butterflies and bees
- plants such as flowers, leaves and trees
- animals such as dogs and pigs, persons, portraits or the like.
- the structural pattern 102 may include a configuration in which one or more logos 102 d are formed to be disposed on a surface 101 of the base layer 100 a by a combination of concavity 102 - 3 and convexity 102 - 4 as illustrated in FIG. 5 .
- logo 102 d includes a group name, a school name, an academy name, a shop name, a group name, a local autonomy organization name or the like, and may also include a person's name or a business card, which should also not be limited to the logos 102 d listed above.
- the structural pattern 102 may include a configuration in which any one selected among the FIG. 102-3 , the image 102 c or the logo 102 d is formed by a combination of the concavity 102 - 3 and the convexity 102 - 4 on the base of the hairline 102 a described above, or at least two or more are selected among the FIG. 102-3 , the image 102 c or the logo 102 d and are formed by a combination of the concavity 102 - 3 and the convexity 102 - 4 , as a means for further utilizing the metallic texture and the design.
- the protruding height of the FIG. 102 b , the image 102 c and the logo 102 d is formed to 0.01 mm or less, because there is no clear differentiation in comparison with the hairline 102 a formed the basic foundation, there is a risk of dropping the visual feeling.
- the too high protruding height of 0.6 mm or more is formed, although the effect of the visual differentiation is excellent in comparison with the hairline 102 a , because there is a risk of damage of the surface 101 of the base layer 100 a due to the intense protrusion, it would be desirable to form the protruding height of 0.01 to 0.6 mm in consideration such a circumstance in the present invention.
- concavity 102 - 3 and the convexity 102 - 4 included in the aforementioned structural pattern 102 may be expressed or formed by intaglio and emboss in the present invention.
- a depth D 1 of the structural pattern 102 listed above is formed by 0.01 to 20 ⁇ m from the surface 100 a of the base layer 101 , as illustrated in FIGS. 6 to 9 .
- the depth D 1 of the structural pattern 102 is shallowly formed below 0.01 ⁇ m, it is very difficult to distinguish with the naked eye, i.e., visually, there is a risk of rather lowering the metallic texture. Meanwhile, when the depth is formed deeply above 20 ⁇ m, because there is a risk of damaging the base layer 100 a of the metal member 100 , it would be desirable to form the depth D 1 of 0.01 to 20 ⁇ m in consideration such a circumstance in the present invention.
- the present invention configured as described above has a configuration in which, as illustrated in FIGS. 6 and 7 , the passivation layer 120 is formed in the structural pattern 102 and the protective layer 130 is formed on the passivation layer 120 as a coated film.
- the protective layer 130 is protected to prevent the structural pattern 102 from being damaged and is uniformly formed as the coated film having a thickness of 0.2 to 20 ⁇ m to improve the corrosion resistance of the base layer 100 a that is formed with the passivation layer 120 .
- the thickness of the protective layer 130 is formed below 0.2 ⁇ m, because a fine structural pattern 102 can be provided, although there is an advantage that facilitates the metallic texture, because the thickness of the coated film is too thin, there is a risk of a decline in the protection properties. Meanwhile, when the thickness is thickly formed above 20 ⁇ m, although the protection properties and the corrosion resistance are excellent, the fine structural pattern 102 may not be provided, and there may be a risk of a decline in the metal texture of the fine structural pattern 102 by mutual interference of reflected light from the outside.
- the thickness of the protective layer 130 not to be too thin or thick within the range of 0.2 to 20 ⁇ m, depending on the using purpose and applications, including the chemical and physical characteristics of the base layer 100 a , i.e., the metal material.
- the present invention includes a configuration in which a passivation layer 120 a provided at the bottom of the base layer 100 a to face the protective layer 130 , that is, on the other surface 101 a on which the structural pattern 102 is not formed.
- the present invention has a configuration in which a fingerprint prevention layer 140 to be described later is forming on the protective layer 130 to a thickness of 0.01 to 2 ⁇ m.
- the present invention has a configuration in which a passivation layer 120 a is formed on the other surface 100 a of the base layer 101 a to face the above-mentioned fingerprint prevention layer 140 .
- the passivation layers 120 and 120 a are formed on the surfaces 101 and 101 a of the base layer 100 a by the reaction with passivation solution 110 , in a state in which the passivation solution 110 to be described later is filled in the solution tank 300 as illustrated in (c) of FIGS. 6 and 7 and the base layer 100 a is immersed (also referred to as “dipping”) in the passivation solution 110 that is heated (also referred to as “heating”) to a passivation treatment heat temperature T 1 by a separate heating means such as a heater.
- the thicknesses of the passivation layers 120 and 120 a are formed in the range of 0.001 to 10 ⁇ m corresponding to 0.005 to 0.5 times the thickness of the protective layer 130 .
- the thickness of the passivation layers 120 and 120 a are thinly formed below 0.001 ⁇ m, because a damage of the fine structural pattern 102 is small, there is an advantages that facilitates the metallic texture.
- the oxide coating also referred to as an “oxide film”
- the thickness is thickly formed above 10 ⁇ m, although the corrosion resistance is excellent, there may be a risk of a damage of the fine structural pattern 102 .
- the thicknesses of the passivation layers 120 and 120 a may vary depending on the passivation treatment heat temperature T 1 , the type of the passivation solution 110 to be described below, i.e., a reactive substance and the immersion time, including the material of the base layer 100 a , e.g., the metal material, it would be desirable to form the thickness to 0.001 to 10 ⁇ m in the present invention.
- the present invention has a configuration in which an adhesive layer 150 having adhesiveness is formed on the passivation layer 120 a that is not formed with the structural pattern 102 as illustrated in FIG. 7 , and the adhesive layer 150 is attached to the outer surface of the main body 200 .
- the present invention has a configuration in which, as illustrated in FIG. 6 , the metal member 100 is provided via an adhesive layer 150 serving as an attaching means so that the protective layer 130 a is in contact with the outer surface of the main body 200 , and the structural pattern 102 is formed on one surface 101 of the base layer 100 a.
- the metal member 100 of the present invention may be configured so that the protective layer 130 a is in contact with the outer surface of the main body 200 by a locking means such as a boss, a rib and a hook provided in the main body 200 .
- the present invention has a configuration that forms a passivation layer 120 formed on the structural pattern 102 , and a passivation layer 120 a is also formed on the other surface 101 a provided on the lower portion of the base layer 100 a to face the passivation layer 120 .
- the pattern structure 102 is not formed on the surface 101 a.
- the present invention has a configuration in which protective layers 130 and 130 a formed as the coated film are formed on the passivation layers 120 and 120 a.
- the protective layers 130 and 130 a have a configuration that is uniformly formed as the coated film having a thickness of 0.2 to 20 ⁇ m as described above so as to protect the structural pattern 102 from being damaged and improve the corrosion resistance of the base layer 100 a formed with the passivation layers 120 and 120 a.
- the present invention has a configuration in which a fingerprint prevention layer 140 described later is formed on the protective layer 130 , i.e., the protective layer 130 formed on the structural pattern 102 to the thickness of 0.01 to 2 ⁇ m.
- the thicknesses of the passivation layers 120 and 120 a are formed to 0.001 to 10 ⁇ m corresponding to 0.005 to 0.5 times the thickness of the protective layers 130 and 130 a as described above.
- the passivation layers 120 and 120 a are formed on the surfaces 101 and 101 a of the base layer 100 by the reaction with the passivation solution 110 in a state in which a solution tank 300 filled with the passivation solution 110 to be described later is provided, and the base layer 100 a is immersed in the passivation solution 110 that is heated (also referred to as “heating”) to the passivation treatment heat temperature T 1 by another heating means such as a heater.
- the present invention has a configuration in which adhesive layer 150 having adhesiveness is formed on the protective layer 130 a that is not formed with the structural pattern 102 and adheres to the outer surface of the main body 200 .
- the adhesive layer 150 is formed by applying an adhesive formed by selecting at least one or two or more of silicone-based adhesive, acryl-based adhesive, urethane-based adhesive, synthetic resin-based adhesive, fluorine resin-based adhesive, epoxy-based adhesive or PET-based adhesive.
- the adhesive layer 150 is formed to include a double-sided tape selected by at least any one among polyamide-based adhesive, polyimide-based adhesive, silicone-based adhesive, fluorine resin-based adhesive, epoxy-based adhesive, urethane-based adhesive, PET-based adhesive, acrylic adhesive and synthetic resin-based adhesive.
- the method includes a step of forming a structural pattern 102 on the surface 101 of the base layer 100 a made of a metal material as described above.
- the method includes a step of forming passivation layers 120 and 120 a by reaction with the passivation solution 110 in a state of immersing the base layer 100 a into the passivation solution 110 heated to a passivation treatment heat temperature T 1 .
- the passivation layers 120 and 120 a are formed on the surface 101 of the base layer 100 a by the reaction with the passivation solution 110 , in a state in which the passivation solution 110 is filled in the solution chamber 300 and the base layer 100 a is immersed in the passivation solution 110 that is heated (also referred to as “heating”) to the passivation treatment heat temperature T 1 by a separate heating means such as a heater.
- the method includes a step of forming the protective layer 130 on the passivation layer 120 by a coating treatment to protect the structural pattern 102 as already described above.
- the protective layer 130 is formed by a transparent resin or a color resin, and is formed by a coating treatment, using at least one of an electrodeposition coating method, a synthetic resin coating method, a powder coating method, and an electrostatic coating method.
- the method includes a step of forming a fingerprint prevention layer 140 on the protective layer 130 .
- the fingerprint prevention layer 140 is formed by being coated by the heat treatment for 15 minutes at the heat temperature of 40 to 120° C. after absorbing the fingerprint prevention solution (not illustrated) to the protective layer 130 (also called as a “contact”), and by forming its thickness to 0.01 to 2 ⁇ m.
- the above-described fingerprint prevention solution would be desirably adsorbed by adsorption means such as injection of the mixed composition of fluorine solvent and volatile solvent at the weight ratio of 1 to 3; 7 to 9 onto the surface of the protective layer 130 , or immersion of the mixed composition into the fingerprint prevention solution (also called as “dipping”).
- adsorption means such as injection of the mixed composition of fluorine solvent and volatile solvent at the weight ratio of 1 to 3; 7 to 9 onto the surface of the protective layer 130 , or immersion of the mixed composition into the fingerprint prevention solution (also called as “dipping”).
- the fingerprint prevention liquid contains a volatile substance, although it is also possible to naturally dry the heat treatment means, it would be more desirable to dry the heat treatment means by infrared or hot air.
- the thickness of the fingerprint prevention layer 140 may be coated too low below 0.01 ⁇ m by the fluorine solvent remaining after the removal of the volatile solvent by thermal treatment.
- the weight ratio of the fluorine solvent is set too high above 3
- the thickness of the fingerprint prevention layer 140 is too thickly coated above 2 ⁇ m, it is feared that the removal of the fingerprints of oil or the like of the human body may become difficult, and it is feared that reflected light of the light from the outside interfere with each other, thereby reducing the metal texture of the fine structural pattern 102 .
- the heat temperature for the heat treatment is set below 40 ⁇ m, it is feared that the coating treatment of the volatile solvent is not normally performed, and finally the fingerprint prevention layer 140 may be easily peeled off. Meanwhile, when the heat temperature is set too high above 120° C., drying of the volatile solvent proceeds too fast, and the peeling phenomenon of the fingerprint prevention layer 140 may occur. Thus, it would be desirable to select the appropriate heat treatment temperature within the range of 40 to 120° C. in consideration of such a circumstance.
- the heat treatment time of the heat temperature is set to be short below 1 minute, the coating treatment of the volatile solvent is not normally performed, it is feared that the fingerprint prevention layer 140 is easily peeled off.
- the heat treatment time is set too long above 15 minutes, although there is an advantage capable of obtaining a perfect fingerprint prevention layer 140 , the process time for the heat treatment becomes unnecessarily longer, which may act as an economically wasteful factor. Thus, it would be desirable to select the appropriate time within the range of 1 to 15 minutes.
- the fingerprint prevention layer 140 is coated at a thickness of 0.01 to 2 pin using a polymer or oligomer resin.
- the thickness of the fingerprint prevention layer 140 is too thinly coated below 0.01 ⁇ m, there is a risk of being easily peeled off or damaged.
- the thickness of the fingerprint prevention layer 140 is too thickly coated over 2 ⁇ m, there is a risk of a difficulty of the removal the fingerprint or body oil, and it is feared that the reflected light of light from the outside interfere with each other to decrease the metal texture of the fine structural pattern 10 .
- the fingerprint prevention layer 140 may be formed to include a polymeric film.
- the polymer film is formed at the thickness of 0.01 to 2 ⁇ m by the adhesive layer (not illustrated) having adhesiveness as d3escribed above.
- the adhesive layer not illustrated
- the polymer film is formed too thin below 0.01 ⁇ m, there is a risk of being easily peeled off or damaged.
- the polymer film is formed too tick above 2 ⁇ m, there is a risk of a difficulty of the removal the fingerprint or body oil, and it is feared that the reflected light of light from the outside interfere with each other to decrease the metal texture of the fine structural pattern 10 .
- the fingerprint prevention layer 140 it would be desirable to transparently form the fingerprint prevention layer 140 to further noticeably provide the metal texture of the finely formed structural pattern 102 .
- the method includes a step of forming a structural pattern 102 on the surface 101 of the base layer 100 a made of a metal material.
- the method includes a step of forming passivation layers 120 and 120 a by the reaction with the passivation solution 110 in a state of being immersing the base layer 100 a into the passivation solution 110 heated to a passivation treatment heat temperature T 1 .
- the method includes a step of forming the protective layer 130 for protecting the structural pattern 102 over the passivation layer 120 .
- the protective layer 130 is formed by a transparent resin or a color resin, and is formed by a coating treatment, using at least one of an electrodeposition coating method, a synthetic resin coating method, a powder coating method, and an electrostatic coating method.
- the method includes a step of attaching the base layer to the outer surface of the main body 200 through the adhesive layer 150 , after forming the adhesive layer 150 having adhesiveness over another passivation layer 120 a that faces the protective layer 130 and is not formed with the structural pattern 102 .
- the passivation layers 120 and 120 a are formed on the surfaces 101 and 101 a of the base layer 100 by the reaction with the passivation solution 110 in a state in which a solution tank 300 is filled with the passivation solution 110 , and the base layer 100 a is immersed in the passivation solution 110 that is heated (also referred to as “heating”) to the passivation treatment heat temperature T 1 by another heating means such as a heater.
- the adhesive layer 150 is formed by applying an adhesive formed by selecting at least one or two or more of silicone-based adhesive, acryl-based adhesive, urethane-based adhesive, synthetic resin-based adhesive, fluorine resin-based adhesive, epoxy-based adhesive or PET-based adhesive.
- the adhesive layer 150 may be formed to include a double-sided tape selected by at least any one among polyamide-based adhesive, polyimide-based adhesive, silicone-based adhesive, fluorine resin-based adhesive, epoxy-based adhesive, urethane-based adhesive, PET-based adhesive, acrylic adhesive and synthetic resin-based adhesive.
- the thickness of the adhesive layer 150 is formed by 0.02 to 0.2 mm.
- the thickness of the adhesive layer 150 is thinly set below 0.02 mm, the adhesiveness is weak, and it is feared that the metal member 100 is easily peeled off from the outer surface of the main body 200 .
- the thickness is thickly set above 0.2 mm, although the adhesiveness is strong, because the overall thickness including the main body 200 becomes thicker, this may become drawbacks to thinning of the product. It will be desirable to select the appropriate thickness, depending on the product, the object and the application to which the metal member 100 of the present invention is applied.
- the method includes a step of forming a structural pattern 102 on the surface 101 of the base layer 100 a made of a metal material.
- the method includes a step of forming passivation layers 120 and 120 a by reaction with the passivation solution 110 in a state of immersing the base layer 100 a into the passivation solution 110 heated to a passivation treatment heat temperature T.
- the method includes a step of forming the protective layer 130 for protecting the structural pattern 102 over the passivation layer 120 .
- the method includes a step of forming the aforementioned fingerprint prevention layer 140 over the protective layer 130 .
- the method includes a step of forming a protective layer 130 a over a passivation layer 120 a of the other surface 101 a that faces the protective layer 130 and is not formed with the structural pattern 102 .
- the passivation layers 120 and 120 a are formed on the surfaces 101 and 101 a of the base layer 100 by the reaction with the passivation solution 110 in a state in which a solution tank 300 is filled with the passivation solution 110 , and the base layer 100 a is immersed in the passivation solution 110 that is heated (also referred to as “heating”) to the passivation treatment heat temperature T 1 by another heating means such as a heater.
- the method includes a step of attaching the base layer to the outer surface of the main body 200 through the adhesive layer 150 , after forming the adhesive layer 150 having adhesiveness over the protective layer 130 a.
- the protective layers 130 and 130 a are formed by a transparent resin or a color resin, and are formed by a coating treatment, using at least one of an electrodeposition coating method, a synthetic resin coating method, a powder coating method, and an electrostatic coating method.
- the structural pattern 102 may be configured to include hairlines 102 a in which mountain sections 102 - 1 and valley sections 102 - 2 are successively formed at identical or non-identical periods.
- the hairline 102 a is characterized in that the mountain sections 102 - 1 and the valley sections 102 - 2 are formed at the cycles of 10 to 400 within an interval L 1 of 1 cm.
- the structural pattern 102 may include a configuration in which FIG. 102 b having the identical or non-identical dimensions are formed by a combination of concavity 102 - 3 and concavity 102 - 4 .
- FIG. 102 b is characterized in that four to four hundreds parts of the concavity 102 - 3 or the convexity 102 - 4 are formed in 1 cm 2 .
- the structural pattern 102 may be configured to an image 102 c formed by a combination of the concavity 102 - 3 and the convexity 102 - 4 .
- the structural pattern 102 may be configured to a log 102 d formed by a combination of the concavity 102 - 3 and the convexity 102 - 4 .
- the aforementioned structural pattern 102 has a configuration in which its depth D 1 is formed to 0.01 to 20 ⁇ m by at least any one selected from laser machining, cutting, grinding, corrosion machining and sandblasting.
- the passivation solution 110 contained in the means for forming the passivation layers 120 and 120 a on the surfaces 101 and 101 a of the base layer 100 a i.e., the reactants for forming the oxide film is formed to include volatile alcohol obtained by mixing at least two or more selected from ethanol, methanol, isopropyl alcohol, butyl alcohol and octyl alcohol.
- the passivation solution 110 may be formed to include volatile keton-based substance obtained by mixing at least any one or two or more selected from acetone, methyl ethyl ketone and methyl isobutyl ketone.
- the passivation treatment heat temperature T 1 contained in the means for forming the passivation layers 120 and 120 a on the surfaces 101 and 101 a of the base layer 100 a by heating the passivation solution 110 of the alcohol-based substance or the ketone-based substance filled in the solution tank 300 in the range from 40° C. to the boiling point, it would be desirable to facilitate the reaction for the formation of the passivation layers 120 and 120 a accordingly.
- the passivation treatment heat temperature T 1 by heating the passivation solution 110 of the alcohol-based substance or the ketone-based substance filled in the solution tank 300 in the range from 40 to 220° C., it would be desirable to facilitate the reaction for the formation of the passivation layers 120 and 120 a.
- the passivation treatment heat temperature T 1 when the passivation treatment heat temperature T 1 is set below 40° C., the reaction of the passivation solution 110 is lowered, and there is a risk of failure in dense formation of the passivation layers 120 and 120 a on the surfaces 101 and 101 a of the base layer. Meanwhile, when the passivation treatment heat temperature T 1 is set above the boiling point and 220° C., because evaporation of the passivation solution 110 formed of the alcohol-based or ketone-based substance is severe and a loss occurs, this case is economically disadvantageous. Furthermore, because there is a risk of a failure in formation of the uniform passivation layers 120 and 120 a , it would be more desirable to select the appropriate passivation treatment heat temperature T 1 within the range from 40° C. to the boiling point or within the range from 40 to 220° C. in consideration of the passivation solution 110 to be creased
- the time of immersing the base layer 100 a in the passivation solution 110 contained in the means for forming the passivation layers 120 and 120 a on the surfaces 101 and 101 a of the base layer 100 a e.g., heated to the passivation treatment heat temperature T 1 may vary depending on the types of the aforementioned alcohol-based or ketone-based reactant contained in the passivation solution 110 , it is more desirable to immerse the base layer within the range from one second to 30 minutes.
- the immersion time when the immersion time is too shortly set below one second, the reaction of the passivation solution 110 is lowered, and there is a risk of a failure of a dense formation of the passivation layers 120 and 120 a on the surfaces 101 and 101 a of the base layer 100 a .
- the immersion time when the immersion time is set to be long over 30 minutes, although there is an advantage in which the compactness of the passivation layers 120 and 120 a is enhanced, the process time for the passivation layers 120 and 120 a , i.e., the passivation treatment becomes unnecessarily longer which may act as an economical waste factor.
- the thicknesses of the passivation layers 120 and 120 a formed on the surfaces 101 and 101 a of the base layer 100 a may vary depending on the type and the immersion time of the passivation solution 110 , i.e., the reactants, including the passivation treatment heat temperature T 1 heated in the solution tank 300 , it is desirable to form the thickness in the range from 0.001 to 10 ⁇ m.
- the thicknesses of the passivation layers 120 and 120 a are thinly formed below 0.001 ⁇ m, damage to the fine structural pattern 102 is small, and there is an advantage of facilitating the metallic texture.
- the oxide coating also referred to as an “oxide film”
- the thickness is thickly formed above 10 ⁇ m, although the corrosion resistance is excellent, there may be a risk of a damage of the fine structural pattern 102 .
- passivation layers 120 and 120 a have the effect that enhances the suction force of the coated film at the time of forming the protective layers 130 and 130 a on the basis of the coating with an improvement in the corrosion resistance, and thus, the metal texture is further improved, including corrosion resistance rust resistance in the metal member 100 of the present invention.
- the present invention would be desirable to sufficiently remove the foreign matters adhered to the surfaces 101 and 101 a via a sufficient degreasing process and a washing process, before immersing the aforementioned base layer 100 a in the solution tank 300 a filled with the passivation solution 110 .
- a step of drying the base layer 100 a may be further included.
- the passivation solution 110 is a volatile substance, it is also possible to naturally dry the passivation solution 110 at room temperature. However, it would be more desirable to dry the passivation solution 110 by an infrared or hot air performed at the heat temperature in the range of 20 to 60° C. or to dry the passivation solution 110 by ultrasound.
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Abstract
The present invention can improve corrosion resistance and fingerprint resistance and can shield electromagnetic waves, as well as imparts a metallic texture to metal materials that is prone to a surface oxidation, such as aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver and silver alloy, including magnesium and magnesium alloy through surface treatments such as a protective layer and an fingerprint prevention layer including a passivation layer. The present invention includes a structural pattern formed on one surface of a base layer; a passivation layer formed on the structural pattern; a protective layer formed on the passivation layer; and a passivation layer that faces the protective layer and is formed on the other surface of the base layer.
Description
- This is a continuation of International Application No. PCT/KR2014/008803 filed on Sep. 23, 2014, which claims priority to Korean Application No. 10-2013-0114272 filed on Sep. 26, 2013, Korean Application 10-2014-0006109 filed on Jan. 17, 2014, and Korean Application 10-2014-0006110 filed on Jan. 17, 2014, which applications are incorporated herein by reference.
- The present invention relates to a metal member applied to an outer case, a housing or the like (hereinafter, referred to as a “main body”) of mobile phones, notebook computers and various electronic apparatuses, and more particularly, to a metal member that can improve corrosion resistance and fingerprint resistance and can shield electromagnetic waves, as well as imparts a metallic texture to metal materials that is prone to a surface oxidation, such as magnesium, magnesium alloy, aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver and silver alloy (hereinafter, referred to as a “metal”) through surface treatments such as a protective layer and an fingerprint prevention layer including a passivation layer.
- Recently, since magnesium and magnesium alloy material are lightweight, have excellent electromagnetic wave shielding and have excellent heat dissipation, they are widely used over wide fields such as computers, laptop computers, cameras, mobile phones, automobiles and aircraft, including various electronic products and electronic equipment.
- However, in order to commercialize a material such as magnesium or magnesium alloy having problems of high oxidation and low corrosion resistance, there is an essential need for another surface treatment to ensure the durability in various internal parts and exterior parts.
- Meanwhile, Korean Patent Laid-Open No. 2002-0077150 (Oct. 11, 2002) entitled “magnesium alloy chemical conversion treatment solution, surface treatment method and magnesium alloy substrate” (referred to as a “
Document 1”) has already been widely known. - When considering the
Document 1 described above, as a means for imparting coating adhesion, corrosion resistance and rust resistance to magnesium alloys, a magnesium alloy chemical conversion solution containing phosphate ions and permanganate ions with pH of 1.5 to 7 and a surface treating method are suggested. - However, in such a conventional method, since the chemical conversion treatment liquid should be preferred in the range from pH 2.0 to 4.0 that is a strong acid treatment conditions, for example, when pH of the chemical conversion treatment solution exceeds 7, an amount of film deposition is extremely low due to the reduction of the oxidizing power of the permanganate ion, the reproduction reliability of the film is degraded, and thus, there are problems in which it is not possible to obtain sufficient corrosion resistance and coating adhesiveness.
- An embodiment of the present invention is directed to provide a metal member that is capable of improving corrosion resistance or the like on a base layer provided as a metal that is prone to a surface oxidation through a surface treatment formed with a passivation layer and a protective layer.
- Further, another embodiment of the present invention is directed to form a structural pattern of various shapes on a surface of a base layer to be able to impart metallic texture.
- Further, still another embodiment of the present invention is directed to form a fingerprint prevention layer of the base layer in the metal member of the present invention to be able to prevent staining of marks such as a fingerprint or oil of a human body.
- Further, still another embodiment of the present invention is directed to a metal member made of a conductive material to be able to shield electromagnetic waves generated from various electronic devices to protect the human body.
- According to an aspect of the present invention, as a configuration means of the metal member for solving the problems of the present invention as described above, a structural pattern formed on one surface of the base layer is configured.
- Further, the passivation layer formed on the structural pattern and a protective layer formed on the passivation layer as a coated film are constituted.
- Moreover, the metal member is configured to include a passivation layer that faces the protective layer and formed on the other surface of the base layer.
- As another configuration means of the metal member for solving the problems of the present invention as described above, a structural pattern formed on one surface of the base layer is constituted.
- Further, a passivation layer formed on the structural pattern and a protective layer formed on the passivation layer are constituted.
- Furthermore, a fingerprint prevention layer formed on the protective layer is constituted.
- Moreover, the metal member includes a passivation layer that faces the fingerprint prevention layer and formed on the other surface of the base layer.
- As still another configuration means of the metal member for solving the problems of the present invention as described above, a structural pattern formed on one surface of the base layer is constituted.
- Furthermore, a passivation layer formed on the structural pattern may be constituted.
- Further, a passivation layer that faces the passivation layer and is formed on the other surface of the base layer is constituted.
- Further, the metal member is configured to include a protective layer formed on the passivation layer.
- Meanwhile, as still another configuration means of the metal member for solving the problems of the present invention as described above, a structural pattern formed on one surface of a base layer is constituted.
- Furthermore, a passivation layer formed on the structural pattern is constituted.
- Further, a passivation layer that faces the passivation layer and is formed on the other surface of the base layer is constituted.
- Moreover, the metal member includes a protective layer formed on the passivation layer and a fingerprint prevention layer formed on the protective layer formed over the structural pattern.
- Meanwhile, according to another aspect of the present invention, there is provided a method for manufacturing a metal member that includes a step of forming a structural pattern on a surface of a base layer.
- Further, the method further includes a step of forming a passivation layer by a reaction with the passivation solution, in a state of immersing the base layer in a passivation solution heated to a passivation treatment heat temperature.
- Further, the method further includes a step of forming a protective layer for protecting the structural pattern on the passivation layer.
- Meanwhile, according to still another aspect of the present invention, there is provided a method for manufacturing a metal member that includes a step of forming a structural pattern on a surface of a base layer.
- Further, the method further includes a step of forming a passivation layer by a reaction with the passivation solution, in a state of immersing the base layer in a passivation solution heated to a passivation treatment heat temperature.
- Further, the method further includes a step of forming a protective layer for protecting the structural pattern over the passivation layer, and a protective layer on the other surface that is not formed with the structural pattern.
- Hereinafter, the configuration means of the object of the present invention and various processes will become more obvious through a detailed description of various embodiments illustrated in the accompanying drawings.
- It should be understood that different embodiments of the invention, including those described under different aspects of the invention, are meant to be generally applicable to all aspects of the invention. Any embodiment may be combined with any other embodiment unless inappropriate. All examples are illustrative and non-limiting.
- Thus, the present invention provides an effect of improving corrosion resistance or the like on a passivation layer provided as a metal prone to a surface oxidation, through a surface treatment formed with a passivation layer and a protective layer.
- Further, the present invention provides an effect of enhancing a quality of a design of a product, by forming structural patterns of various shapes on the surface of the base layer to impart a metallic texture.
- Further, the present invention provides an effect of always maintaining a clean surface state, by preventing fingerprint or oil of a human body from remaining through the fingerprint prevention layer formed on the base layer.
- Further, the present invention provides another advantage of being able to protect the human body from the electromagnetic waves, by shielding the electromagnetic waves generated from various electronic devices, in a case of attaching a conductive metal member to the outer surface of the main body.
-
FIG. 1 is a diagram of one embodiment illustrated schematically a state in which a metal member according to the present invention is applied. -
FIG. 2 is a diagram schematically illustrating a first embodiment of a structural pattern formed on a surface of the base layer inFIG. 1 according to the present invention. -
FIG. 3 is a diagram schematically illustrating a second embodiment of a structural pattern formed on a surface of a base layer inFIG. 1 according to the present invention. -
FIG. 4 is a diagram schematically illustrating a third embodiment of a structural pattern formed on a surface of the base layer inFIG. 1 according to the present invention. -
FIG. 5 is a diagram schematically illustrating a fourth embodiment of a structural pattern formed on the surface of the base layer inFIG. 1 according to the present invention. -
FIG. 6 is a diagram of a first embodiment schematically illustrating a manufacturing process of a metal member according to the present invention. -
FIG. 7 is a diagram of a second embodiment schematically illustrating a manufacturing process of the metal member according to the present invention. -
FIG. 8 is a diagram of a third embodiment schematically illustrating a manufacturing process of the metal member according to the present invention. -
FIG. 9 is a diagram of a fourth embodiment schematically illustrating a manufacturing process of the metal member according to the present invention. - Exemplary embodiments of the present invention will be described below in more detail with reference to the accompanying drawings. The present invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. Throughout the disclosure, like reference numerals refer to like parts throughout the various figures and embodiments of the present invention.
- In describing specific embodiments of the present invention, the operation and configuration means illustrated by the drawings of the present invention are described as at least one embodiment, and the technical idea of the present invention and its essential configuration means should not be limited thereby.
- For reference matter, when adding reference numerals in the drawings described in the present invention, it should be particularly noted that the same constituent elements are denoted by the same reference numerals even if they are added in other drawings.
- The present invention will be described in detail below with reference to the attached drawings illustrated in
FIGS. 1 to 9 . - A
metal member 100 according to the present invention is provided to include a metallic material such as aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver and silver alloy (hereinafter, referred to as a “metal”), including magnesium, magnesium alloy or the like that is prone to a surface oxidation. - Further, in the present invention, the
metal member 100 imparts a metallic texture, improves a corrosion resistance, a salt resistance, a corrosion resistance, a paint adhesion, a fingerprint resistance and the like, and further can shield electromagnetic waves, by formingprotective layers fingerprint prevention layer 140 includingpassivation layers base layer 100 a (which is also referred to as a “basic material layer”) provided by various ways such as a die casting, injection, extrusion, rolling, pressing or polishing, by utilizing the aforementioned metal material. - In the present invention, the
base layer 100 a is magnesium (Mg) alone or is configured to include at least any one or more selected magnesium alloy among Al, Cu, Ti, Ag, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca, Li and Be in magnesium (Mg). - Further, in the present invention, the
base layer 100 a is aluminum (Al) alone or is configured to include at least any one or more selected aluminum alloys among Mg, Cu, Ti, Ag, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca, Li and Be in aluminum (Al). - Further, in the present invention, the
base layer 100 a is copper (Cu) alone or is configured to include at least any one or more selected copper alloys among Mg, Al, Ti, Ag, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca, Li and Be in copper (Cu). - Further, in the present invention, the
base layer 100 a is titanium (Ti) alone or is configured to include at least any one or more selected titanium alloys among Mg, Al, Cu, Ag, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca, Li and Be in titanium (Ti). - Further, in the present invention, the
base layer 100 a is silver (Ag) alone or is configured to include at least any one or more selected silver alloys among Mg, Al, Cu, Ti, Ni, Si, Cr, Mn, Zn, Zr, Fe, Ca Li and Be in silver (Ag). - In addition, in the present invention, a thickness t1 of the
base layer 100 a is constituted by 0.02 to 6 mm. - For example, when the thickness t1 of the
base layer 100 a is too thin below 0.02 mm, there is also a difficulty in formation of astructural pattern 102 andpassivation layers - Accordingly, in the present invention, the thickness t1 is desirably set to approximately 2 mm, depending on the usage purpose and application, including the chemical and physical properties and the workability of the metal material. Furthermore, in the present invention, it is desirable to further include a thinner or thicker thickness in the range of 0.02 to 6 mm.
- Meanwhile, as the reliability test conditions of the
metal member 100 according to the present invention, since there is need for no deformation or deterioration in a cold thermal shock test performed over 24 cycles from 30 minutes of the temperature −40° C. to 30 minutes of 80° C., and a salt water resistance test performed in salt water of 5% for 48 hours, including a constant-temperature and constant-humidity test performed at a temperature 60° C. and a humidity of 90% for 24 hours, the surface treatment technique is becomes more important than anything. - First, the configuration means of the
metal member 100 for solving the problems of the present invention and an embodiment thereof will be specifically described with reference to the accompanying drawings. - As illustrated in attached
FIG. 1 , the present invention is provided in an external case, a housing (hereinafter, referred to as a “main body”) or the like in mobile phones, notebook computers and various electronic devices, by synthetic resin, urethane, rubber resin or the like. At this time, themetal member 100 is provided through anadhesive layer 150 serving as an attaching means such that thepassivation layer 120 a is in contact with the outer surface of themain body 200 described above as illustrated inFIG. 7 or themetal member 100 is provided through anadhesive layer 150 serving as an attaching means such that aprotective layer 130 a is in contact with the outer surface as illustrated in appendedFIG. 9 . - Alternatively, the
metal member 100 of the present invention may also be configured so that thepassivation layer 120 a or theprotective layer 130 a is in contact with the outer surface, by locking means such as a boss, a rib or a hook provided in themain body 200, and it is a matter of course that themain body 200 should not be limited to the aforementioned materials. - Further, as illustrated in attached
FIG. 1 andFIGS. 2 to 5 , the present invention is characterized by variousstructural patterns 102 formed on onesurface 101 of abase layer 100 a provided on themetal member 100, and thestructural pattern 102 means formation and visual expression such ashairline 102 a, a graphic 102 b, animage 102 c and alogo 102 d by physical and chemical means. - For example, the aforementioned
structural pattern 102 may be configured to include ahairline 102 a in which mountain sections 102-1 and valley sections 102-2 are successively formed at identical or non-identical periods as illustrated inFIG. 2 . - At this time, the
hairline 102 a is characterized in that the mountain sections 102-1 and the valley sections 102-2 are formed at the cycles of 10 to 400 within an interval L1 of 1 cm. - That is to say, in the above-mentioned
hairline 102 a, when the mountain sections 102-1 and the valley sections 102-2 are formed at 10 cycles or less within the interval L1 of 1 cm, that is, when the number of the mountain sections 102-1 or the valley sections 102-2 is formed by 5 or less, the metallic texture is lowered due to too shapeless interval, and there is a risk of degradation of the design of the product. Meanwhile, when the mountain sections 102-1 and the valley sections 102-2 are formed at 400 cycles or more within the interval L1 of 1 cm, that is, when the number of mountain sections 102-1 or valley sections 102-2 are tightly formed by 200 or more, although the metallic texture, the design and the refinement are excellent, because this case may act as a factor that increases the time and the cost for polishing or machining them, it is desirable to form the mountain sections and the valley sections substantially at the 200 cycles within the interval L1 of 1 cm in consideration of these points. However, it is more desirable to form the mountain sections and the valley sections at the 10 to 400 cycles in the present invention. - Further, as illustrated in
FIG. 3 , thestructural pattern 102 may include a configuration in which one or moreFIG. 102b having the identical or non-identical dimensions are formed to be disposed on thesurface 101 of thebase layer 100 a by combination of concavity 102-3 and concavity 102-4. - For example, the
FIG. 102b may includes various kinds ofFIG. 102b such as a circular shape, a triangular shape, a square shape, a pentagonal shape, a hexagonal shape and a diamond shape, and naturally should not be limited to theFIG. 102b described above. - At this time, the
FIG. 102b is characterized in that four to four hundreds parts of the concavity 102-3 or the convexity 102-4 are formed in 1 cm2. - In other words, when forming the above-mentioned concavities 102-3 of four or less, the metallic texture is lowered due to too poor configuration and there is a risk of a decline in design of the product. Meanwhile, when too many concavities 102-3 of four-hundreds or more are too tightly formed, although there are advantages in which the metal texture, the design and the refinement are excellent, because this may act as a factor that increases the time and the cost for polishing or machining them, it is desirable to form approximately two-hundred
concavities 200 in consideration of such circumstances. However, it will be more desirable to form the four to four-hundred concavities. - Further, as illustrated in
FIG. 4 , thestructural pattern 102 may include a configuration in which one ormore images 102 c are formed to be disposed on thesurface 101 of thebase layer 100 a by a combination of the concavity 102-3 and the convexity 102-4. For example, in theimage 102 c may include insects such as butterflies and bees, including plants, such as flowers, leaves and trees, and may also include animals such as dogs and pigs, persons, portraits or the like. Of course, it should not be limited to theimages 102 c listed above. - Further, the
structural pattern 102 may include a configuration in which one ormore logos 102 d are formed to be disposed on asurface 101 of thebase layer 100 a by a combination of concavity 102-3 and convexity 102-4 as illustrated inFIG. 5 . - For example, in the above-mentioned
logo 102 d includes a group name, a school name, an academy name, a shop name, a group name, a local autonomy organization name or the like, and may also include a person's name or a business card, which should also not be limited to thelogos 102 d listed above. - Meanwhile, in the present invention, as illustrated in
FIG. 2 , thestructural pattern 102 may include a configuration in which any one selected among theFIG. 102-3 , theimage 102 c or thelogo 102 d is formed by a combination of the concavity 102-3 and the convexity 102-4 on the base of thehairline 102 a described above, or at least two or more are selected among theFIG. 102-3 , theimage 102 c or thelogo 102 d and are formed by a combination of the concavity 102-3 and the convexity 102-4, as a means for further utilizing the metallic texture and the design. - At this time, it would be desirable to differentiate the
structural pattern 102 from thehairline 102 a by the configuration in which theFIG. 102b , theimage 102 c and thelogo 102 d are formed to protrude at a height of 0.01 to 0.6 mm from thesurface 101 of thebase layer 102 a formed with thehairline 100 a. - Furthermore, it would be desirable to perform a mirror treatment or a hatching treatment of the surface (not illustrated) of the
FIG. 102b , theimage 102 c and thelogo 102 d formed to protrude, thereby differentiating from thehairline 102 a and providing the better visual feeling. - For example, when the protruding height of the
FIG. 102b , theimage 102 c and thelogo 102 d is formed to 0.01 mm or less, because there is no clear differentiation in comparison with thehairline 102 a formed the basic foundation, there is a risk of dropping the visual feeling. Meanwhile, when the too high protruding height of 0.6 mm or more is formed, although the effect of the visual differentiation is excellent in comparison with thehairline 102 a, because there is a risk of damage of thesurface 101 of thebase layer 100 a due to the intense protrusion, it would be desirable to form the protruding height of 0.01 to 0.6 mm in consideration such a circumstance in the present invention. - Further, it will be obvious that the concavity 102-3 and the convexity 102-4 included in the aforementioned
structural pattern 102 may be expressed or formed by intaglio and emboss in the present invention. - In addition, in the present invention, a depth D1 of the
structural pattern 102 listed above is formed by 0.01 to 20 μm from thesurface 100 a of thebase layer 101, as illustrated inFIGS. 6 to 9 . - At this time, when the depth D1 of the
structural pattern 102 is shallowly formed below 0.01 μm, it is very difficult to distinguish with the naked eye, i.e., visually, there is a risk of rather lowering the metallic texture. Meanwhile, when the depth is formed deeply above 20 μm, because there is a risk of damaging thebase layer 100 a of themetal member 100, it would be desirable to form the depth D1 of 0.01 to 20 μm in consideration such a circumstance in the present invention. - The present invention configured as described above has a configuration in which, as illustrated in
FIGS. 6 and 7 , thepassivation layer 120 is formed in thestructural pattern 102 and theprotective layer 130 is formed on thepassivation layer 120 as a coated film. - In the present invention, the
protective layer 130 is protected to prevent thestructural pattern 102 from being damaged and is uniformly formed as the coated film having a thickness of 0.2 to 20 μm to improve the corrosion resistance of thebase layer 100 a that is formed with thepassivation layer 120. - At this time, when the thickness of the
protective layer 130 is formed below 0.2 μm, because a finestructural pattern 102 can be provided, although there is an advantage that facilitates the metallic texture, because the thickness of the coated film is too thin, there is a risk of a decline in the protection properties. Meanwhile, when the thickness is thickly formed above 20 μm, although the protection properties and the corrosion resistance are excellent, the finestructural pattern 102 may not be provided, and there may be a risk of a decline in the metal texture of the finestructural pattern 102 by mutual interference of reflected light from the outside. - Therefore, it would be desirable to properly select and form the thickness of the
protective layer 130 not to be too thin or thick within the range of 0.2 to 20 μm, depending on the using purpose and applications, including the chemical and physical characteristics of thebase layer 100 a, i.e., the metal material. - Further, the present invention includes a configuration in which a
passivation layer 120 a provided at the bottom of thebase layer 100 a to face theprotective layer 130, that is, on theother surface 101 a on which thestructural pattern 102 is not formed. - Furthermore, the present invention has a configuration in which a
fingerprint prevention layer 140 to be described later is forming on theprotective layer 130 to a thickness of 0.01 to 2 μm. - Further, the present invention has a configuration in which a
passivation layer 120 a is formed on theother surface 100 a of thebase layer 101 a to face the above-mentionedfingerprint prevention layer 140. - In the present invention, the passivation layers 120 and 120 a are formed on the
surfaces base layer 100 a by the reaction withpassivation solution 110, in a state in which thepassivation solution 110 to be described later is filled in thesolution tank 300 as illustrated in (c) ofFIGS. 6 and 7 and thebase layer 100 a is immersed (also referred to as “dipping”) in thepassivation solution 110 that is heated (also referred to as “heating”) to a passivation treatment heat temperature T1 by a separate heating means such as a heater. At this time, the thicknesses of the passivation layers 120 and 120 a are formed in the range of 0.001 to 10 μm corresponding to 0.005 to 0.5 times the thickness of theprotective layer 130. - For example, when the thickness of the passivation layers 120 and 120 a are thinly formed below 0.001 μm, because a damage of the fine
structural pattern 102 is small, there is an advantages that facilitates the metallic texture. However, because the oxide coating (also referred to as an “oxide film”) is formed too thin, there is a risk of a decline in the corrosion resistance. Meanwhile, when the thickness is thickly formed above 10 μm, although the corrosion resistance is excellent, there may be a risk of a damage of the finestructural pattern 102. - Accordingly, in the present invention, although the thicknesses of the passivation layers 120 and 120 a may vary depending on the passivation treatment heat temperature T1, the type of the
passivation solution 110 to be described below, i.e., a reactive substance and the immersion time, including the material of thebase layer 100 a, e.g., the metal material, it would be desirable to form the thickness to 0.001 to 10 μm in the present invention. - Furthermore, the present invention has a configuration in which an
adhesive layer 150 having adhesiveness is formed on thepassivation layer 120 a that is not formed with thestructural pattern 102 as illustrated inFIG. 7 , and theadhesive layer 150 is attached to the outer surface of themain body 200. - Meanwhile, the present invention has a configuration in which, as illustrated in
FIG. 6 , themetal member 100 is provided via anadhesive layer 150 serving as an attaching means so that theprotective layer 130 a is in contact with the outer surface of themain body 200, and thestructural pattern 102 is formed on onesurface 101 of thebase layer 100 a. - Alternatively, the
metal member 100 of the present invention may be configured so that theprotective layer 130 a is in contact with the outer surface of themain body 200 by a locking means such as a boss, a rib and a hook provided in themain body 200. - Further, the present invention has a configuration that forms a
passivation layer 120 formed on thestructural pattern 102, and apassivation layer 120 a is also formed on theother surface 101 a provided on the lower portion of thebase layer 100 a to face thepassivation layer 120. - At this time, the
pattern structure 102 is not formed on thesurface 101 a. - Further, the present invention has a configuration in which
protective layers - In the present invention, the
protective layers structural pattern 102 from being damaged and improve the corrosion resistance of thebase layer 100 a formed with the passivation layers 120 and 120 a. - Furthermore, the present invention has a configuration in which a
fingerprint prevention layer 140 described later is formed on theprotective layer 130, i.e., theprotective layer 130 formed on thestructural pattern 102 to the thickness of 0.01 to 2 μm. - Further, the thicknesses of the passivation layers 120 and 120 a are formed to 0.001 to 10 μm corresponding to 0.005 to 0.5 times the thickness of the
protective layers - Meanwhile, as illustrated in (c) of
FIGS. 8 and 9 c, in the present invention, the passivation layers 120 and 120 a are formed on thesurfaces base layer 100 by the reaction with thepassivation solution 110 in a state in which asolution tank 300 filled with thepassivation solution 110 to be described later is provided, and thebase layer 100 a is immersed in thepassivation solution 110 that is heated (also referred to as “heating”) to the passivation treatment heat temperature T1 by another heating means such as a heater. - In addition, as illustrated in
FIG. 6 , the present invention has a configuration in whichadhesive layer 150 having adhesiveness is formed on theprotective layer 130 a that is not formed with thestructural pattern 102 and adheres to the outer surface of themain body 200. - At this time, the
adhesive layer 150 is formed by applying an adhesive formed by selecting at least one or two or more of silicone-based adhesive, acryl-based adhesive, urethane-based adhesive, synthetic resin-based adhesive, fluorine resin-based adhesive, epoxy-based adhesive or PET-based adhesive. - Further, as other means, the
adhesive layer 150 is formed to include a double-sided tape selected by at least any one among polyamide-based adhesive, polyimide-based adhesive, silicone-based adhesive, fluorine resin-based adhesive, epoxy-based adhesive, urethane-based adhesive, PET-based adhesive, acrylic adhesive and synthetic resin-based adhesive. - Hereinafter, the manufacturing process of the
metal member 100 and its embodiments for solving the problems of the present invention will be specifically described with reference to the accompanying drawings. - First, as illustrated in
FIG. 6 , the method includes a step of forming astructural pattern 102 on thesurface 101 of thebase layer 100 a made of a metal material as described above. - Further, the method includes a step of forming
passivation layers passivation solution 110 in a state of immersing thebase layer 100 a into thepassivation solution 110 heated to a passivation treatment heat temperature T1. - In the present invention, as illustrated in (c) of FIG. 6, the passivation layers 120 and 120 a are formed on the
surface 101 of thebase layer 100 a by the reaction with thepassivation solution 110, in a state in which thepassivation solution 110 is filled in thesolution chamber 300 and thebase layer 100 a is immersed in thepassivation solution 110 that is heated (also referred to as “heating”) to the passivation treatment heat temperature T1 by a separate heating means such as a heater. - Also, the method includes a step of forming the
protective layer 130 on thepassivation layer 120 by a coating treatment to protect thestructural pattern 102 as already described above. - In the present invention, the
protective layer 130 is formed by a transparent resin or a color resin, and is formed by a coating treatment, using at least one of an electrodeposition coating method, a synthetic resin coating method, a powder coating method, and an electrostatic coating method. - Further, the method includes a step of forming a
fingerprint prevention layer 140 on theprotective layer 130. - In the present invention, the
fingerprint prevention layer 140 is formed by being coated by the heat treatment for 15 minutes at the heat temperature of 40 to 120° C. after absorbing the fingerprint prevention solution (not illustrated) to the protective layer 130 (also called as a “contact”), and by forming its thickness to 0.01 to 2 μm. - Further, the above-described fingerprint prevention solution would be desirably adsorbed by adsorption means such as injection of the mixed composition of fluorine solvent and volatile solvent at the weight ratio of 1 to 3; 7 to 9 onto the surface of the
protective layer 130, or immersion of the mixed composition into the fingerprint prevention solution (also called as “dipping”). - At this time, since the fingerprint prevention liquid contains a volatile substance, although it is also possible to naturally dry the heat treatment means, it would be more desirable to dry the heat treatment means by infrared or hot air.
- In addition, when the weight ratio of the fluorine solvent is set too low below 1 in the fingerprint prevention solution, it is feared that the thickness of the
fingerprint prevention layer 140 may be coated too low below 0.01 μm by the fluorine solvent remaining after the removal of the volatile solvent by thermal treatment. Meanwhile, when the weight ratio of the fluorine solvent is set too high above 3, the thickness of thefingerprint prevention layer 140 is too thickly coated above 2 μm, it is feared that the removal of the fingerprints of oil or the like of the human body may become difficult, and it is feared that reflected light of the light from the outside interfere with each other, thereby reducing the metal texture of the finestructural pattern 102. Thus, it would be desirable to uniformly form the fingerprint prevention liquid at a thickness of 0.01 to 2 μm in consideration of such a circumstance. - Further, when the heat temperature for the heat treatment is set below 40 μm, it is feared that the coating treatment of the volatile solvent is not normally performed, and finally the
fingerprint prevention layer 140 may be easily peeled off. Meanwhile, when the heat temperature is set too high above 120° C., drying of the volatile solvent proceeds too fast, and the peeling phenomenon of thefingerprint prevention layer 140 may occur. Thus, it would be desirable to select the appropriate heat treatment temperature within the range of 40 to 120° C. in consideration of such a circumstance. - Further, even when the heat treatment time of the heat temperature is set to be short below 1 minute, the coating treatment of the volatile solvent is not normally performed, it is feared that the
fingerprint prevention layer 140 is easily peeled off. Meanwhile, when the heat treatment time is set too long above 15 minutes, although there is an advantage capable of obtaining a perfectfingerprint prevention layer 140, the process time for the heat treatment becomes unnecessarily longer, which may act as an economically wasteful factor. Thus, it would be desirable to select the appropriate time within the range of 1 to 15 minutes. - Meanwhile, in the present invention, the
fingerprint prevention layer 140 is coated at a thickness of 0.01 to 2 pin using a polymer or oligomer resin. When the thickness of thefingerprint prevention layer 140 is too thinly coated below 0.01 μm, there is a risk of being easily peeled off or damaged. Meanwhile, when the thickness of thefingerprint prevention layer 140 is too thickly coated over 2 μm, there is a risk of a difficulty of the removal the fingerprint or body oil, and it is feared that the reflected light of light from the outside interfere with each other to decrease the metal texture of the fine structural pattern 10. Thus, it would be desirable to uniformly form a thickness of 0.01 to 2 μm in consideration such a circumstance so that the thickness is not too thin or too thick. - Further, in the present invention, the
fingerprint prevention layer 140 may be formed to include a polymeric film. At this time, the polymer film is formed at the thickness of 0.01 to 2 μm by the adhesive layer (not illustrated) having adhesiveness as d3escribed above. When the polymer film is formed too thin below 0.01 μm, there is a risk of being easily peeled off or damaged. Meanwhile, when the polymer film is formed too tick above 2 μm, there is a risk of a difficulty of the removal the fingerprint or body oil, and it is feared that the reflected light of light from the outside interfere with each other to decrease the metal texture of the fine structural pattern 10. Thus, it would be desirable to uniformly form a thickness of 0.01 to 2 μm in consideration such a circumstance so that the thickness is not too thin or too thick. - In addition, in the present invention, it would be desirable to transparently form the
fingerprint prevention layer 140 to further noticeably provide the metal texture of the finely formedstructural pattern 102. - Hereinafter, other manufacturing processes of the
metal member 100 for solving the problems according to the present invention and its embodiment will be specifically described with reference to the accompanying drawings. - First, as illustrated in
FIG. 7 , the method includes a step of forming astructural pattern 102 on thesurface 101 of thebase layer 100 a made of a metal material. - Further, the method includes a step of forming
passivation layers passivation solution 110 in a state of being immersing thebase layer 100 a into thepassivation solution 110 heated to a passivation treatment heat temperature T1. - Further, the method includes a step of forming the
protective layer 130 for protecting thestructural pattern 102 over thepassivation layer 120. - At this time, the
protective layer 130 is formed by a transparent resin or a color resin, and is formed by a coating treatment, using at least one of an electrodeposition coating method, a synthetic resin coating method, a powder coating method, and an electrostatic coating method. - Further, the method includes a step of attaching the base layer to the outer surface of the
main body 200 through theadhesive layer 150, after forming theadhesive layer 150 having adhesiveness over anotherpassivation layer 120 a that faces theprotective layer 130 and is not formed with thestructural pattern 102. - Meanwhile, in the present invention, as illustrated in (c) of
FIG. 7 , the passivation layers 120 and 120 a are formed on thesurfaces base layer 100 by the reaction with thepassivation solution 110 in a state in which asolution tank 300 is filled with thepassivation solution 110, and thebase layer 100 a is immersed in thepassivation solution 110 that is heated (also referred to as “heating”) to the passivation treatment heat temperature T1 by another heating means such as a heater. - In addition, the
adhesive layer 150 is formed by applying an adhesive formed by selecting at least one or two or more of silicone-based adhesive, acryl-based adhesive, urethane-based adhesive, synthetic resin-based adhesive, fluorine resin-based adhesive, epoxy-based adhesive or PET-based adhesive. - Further, as other means, the
adhesive layer 150 may be formed to include a double-sided tape selected by at least any one among polyamide-based adhesive, polyimide-based adhesive, silicone-based adhesive, fluorine resin-based adhesive, epoxy-based adhesive, urethane-based adhesive, PET-based adhesive, acrylic adhesive and synthetic resin-based adhesive. - At this time, the thickness of the
adhesive layer 150 is formed by 0.02 to 0.2 mm. For example, when the thickness of theadhesive layer 150 is thinly set below 0.02 mm, the adhesiveness is weak, and it is feared that themetal member 100 is easily peeled off from the outer surface of themain body 200. Meanwhile, when the thickness is thickly set above 0.2 mm, although the adhesiveness is strong, because the overall thickness including themain body 200 becomes thicker, this may become drawbacks to thinning of the product. It will be desirable to select the appropriate thickness, depending on the product, the object and the application to which themetal member 100 of the present invention is applied. - Hereinafter, still another manufacturing process of the
metal member 100 for solving the problems according to the present invention and its embodiment will be specifically described with reference to the accompanying drawings. - First, as illustrated in
FIG. 6 , the method includes a step of forming astructural pattern 102 on thesurface 101 of thebase layer 100 a made of a metal material. - Further, the method includes a step of forming
passivation layers passivation solution 110 in a state of immersing thebase layer 100 a into thepassivation solution 110 heated to a passivation treatment heat temperature T. - Further, the method includes a step of forming the
protective layer 130 for protecting thestructural pattern 102 over thepassivation layer 120. - Further, the method includes a step of forming the aforementioned
fingerprint prevention layer 140 over theprotective layer 130. - Further, the method includes a step of forming a
protective layer 130 a over apassivation layer 120 a of theother surface 101 a that faces theprotective layer 130 and is not formed with thestructural pattern 102. - Meanwhile, in the present invention, as illustrated in (c) of
FIG. 6 , the passivation layers 120 and 120 a are formed on thesurfaces base layer 100 by the reaction with thepassivation solution 110 in a state in which asolution tank 300 is filled with thepassivation solution 110, and thebase layer 100 a is immersed in thepassivation solution 110 that is heated (also referred to as “heating”) to the passivation treatment heat temperature T1 by another heating means such as a heater. - Further, the method includes a step of attaching the base layer to the outer surface of the
main body 200 through theadhesive layer 150, after forming theadhesive layer 150 having adhesiveness over theprotective layer 130 a. - Here, the
protective layers - Hereinafter, various embodiments that can be included in the present invention including the manufacturing processes as described above will be described in more detail.
- First, in the present invention, as illustrated in
FIG. 2-1 , thestructural pattern 102 may be configured to includehairlines 102 a in which mountain sections 102-1 and valley sections 102-2 are successively formed at identical or non-identical periods. - At this time, the
hairline 102 a is characterized in that the mountain sections 102-1 and the valley sections 102-2 are formed at the cycles of 10 to 400 within an interval L1 of 1 cm. - Further, in the present invention, as illustrated in
FIG. 2-2 , thestructural pattern 102 may include a configuration in whichFIG. 102b having the identical or non-identical dimensions are formed by a combination of concavity 102-3 and concavity 102-4. - At this time, the
FIG. 102b is characterized in that four to four hundreds parts of the concavity 102-3 or the convexity 102-4 are formed in 1 cm2. - Further, in the present invention, as illustrated in
FIG. 2-3 , thestructural pattern 102 may be configured to animage 102 c formed by a combination of the concavity 102-3 and the convexity 102-4. - Further, in the present invention, in the present invention, as illustrated in
FIG. 2-4 , thestructural pattern 102 may be configured to alog 102 d formed by a combination of the concavity 102-3 and the convexity 102-4. - In addition, in the present invention, the aforementioned
structural pattern 102 has a configuration in which its depth D1 is formed to 0.01 to 20 μm by at least any one selected from laser machining, cutting, grinding, corrosion machining and sandblasting. - Meanwhile, in the present invention, the
passivation solution 110 contained in the means for forming the passivation layers 120 and 120 a on thesurfaces base layer 100 a, i.e., the reactants for forming the oxide film is formed to include volatile alcohol obtained by mixing at least two or more selected from ethanol, methanol, isopropyl alcohol, butyl alcohol and octyl alcohol. - Further, the
passivation solution 110 may be formed to include volatile keton-based substance obtained by mixing at least any one or two or more selected from acetone, methyl ethyl ketone and methyl isobutyl ketone. - Meanwhile, in the present invention, in regards to the passivation treatment heat temperature T1 contained in the means for forming the passivation layers 120 and 120 a on the
surfaces base layer 100 a, by heating thepassivation solution 110 of the alcohol-based substance or the ketone-based substance filled in thesolution tank 300 in the range from 40° C. to the boiling point, it would be desirable to facilitate the reaction for the formation of the passivation layers 120 and 120 a accordingly. - Further, in regards to the passivation treatment heat temperature T1, by heating the
passivation solution 110 of the alcohol-based substance or the ketone-based substance filled in thesolution tank 300 in the range from 40 to 220° C., it would be desirable to facilitate the reaction for the formation of the passivation layers 120 and 120 a. - For example, when the passivation treatment heat temperature T1 is set below 40° C., the reaction of the
passivation solution 110 is lowered, and there is a risk of failure in dense formation of the passivation layers 120 and 120 a on thesurfaces passivation solution 110 formed of the alcohol-based or ketone-based substance is severe and a loss occurs, this case is economically disadvantageous. Furthermore, because there is a risk of a failure in formation of the uniform passivation layers 120 and 120 a, it would be more desirable to select the appropriate passivation treatment heat temperature T1 within the range from 40° C. to the boiling point or within the range from 40 to 220° C. in consideration of thepassivation solution 110 to be creased - That is to say, when examining its boiling point in the alcohol reactant contained in the
passivation solution 110, ethanol is 8.3° C., methanol is 64.65° C., isopropyl alcohol is 82° C., butyl alcohol is 117.7° C., and octyl alcohol is 194.5° C. Meanwhile, when examining the boiling point in the ketone-based reactant contained in thepassivation solution 110, acetone is 56.5° C., methyl ethyl ketone is 79.6° C. and methyl isobutyl ketone is 115.9° C. Thus, in the present invention, it would be more desirable to create by selecting one of them alone or appropriately select the passivation treatment heat temperature T1 within the range from 40° C. to the boiling point or within the range from 40 to 220° C., depending on the type of reactants created by a combination of two or more substances. - Furthermore, in the present invention, although the time of immersing the
base layer 100 a in thepassivation solution 110 contained in the means for forming the passivation layers 120 and 120 a on thesurfaces base layer 100 a, e.g., heated to the passivation treatment heat temperature T1 may vary depending on the types of the aforementioned alcohol-based or ketone-based reactant contained in thepassivation solution 110, it is more desirable to immerse the base layer within the range from one second to 30 minutes. - For example, when the immersion time is too shortly set below one second, the reaction of the
passivation solution 110 is lowered, and there is a risk of a failure of a dense formation of the passivation layers 120 and 120 a on thesurfaces base layer 100 a. Meanwhile, when the immersion time is set to be long over 30 minutes, although there is an advantage in which the compactness of the passivation layers 120 and 120 a is enhanced, the process time for the passivation layers 120 and 120 a, i.e., the passivation treatment becomes unnecessarily longer which may act as an economical waste factor. Thus, it is more desirable to suitably select the immersion time within the range from 1 second to 30 minutes in the present invention. - In this way, although the thicknesses of the passivation layers 120 and 120 a formed on the
surfaces base layer 100 a may vary depending on the type and the immersion time of thepassivation solution 110, i.e., the reactants, including the passivation treatment heat temperature T1 heated in thesolution tank 300, it is desirable to form the thickness in the range from 0.001 to 10 μm. - For example, when the thicknesses of the passivation layers 120 and 120 a are thinly formed below 0.001 μm, damage to the fine
structural pattern 102 is small, and there is an advantage of facilitating the metallic texture. However, because the oxide coating (also referred to as an “oxide film”) is formed too thin, there is a risk of a decline in the corrosion resistance. Meanwhile, when the thickness is thickly formed above 10 μm, although the corrosion resistance is excellent, there may be a risk of a damage of the finestructural pattern 102. - Thus formed
passivation layers protective layers metal member 100 of the present invention. - Meanwhile, the present invention would be desirable to sufficiently remove the foreign matters adhered to the
surfaces aforementioned base layer 100 a in the solution tank 300 a filled with thepassivation solution 110. - That is to say, when the foreign matters adhere to the
surfaces base layer 100 a, because thepassivation solution 110 does not entirely uniformly adhere by a surface tension, finally, it may give a bad influence on the formation of the passivation layers 120 and 120 a. - Subsequently, after forming the passivation layers 120 and 120 a, a step of drying the
base layer 100 a may be further included. - For example, because the
passivation solution 110 is a volatile substance, it is also possible to naturally dry thepassivation solution 110 at room temperature. However, it would be more desirable to dry thepassivation solution 110 by an infrared or hot air performed at the heat temperature in the range of 20 to 60° C. or to dry thepassivation solution 110 by ultrasound. - It will be obvious to those skilled in the art that various changes and modifications may be made without departing from the technical idea of the present invention.
- Accordingly, the technical scope of the present invention will be desirably defined by the claims of the present invention, rather than being limited to the contents described in various embodiments as described.
- While the present invention has been described with respect to the specific embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (18)
1. A metal member (100) comprising:
a structural pattern (102) formed on one surface (101) of a base layer (100 a);
a passivation layer (120) formed on the structural pattern (102);
a protective layer (130) formed as a coated film having a thickness of 0.2 to 20 μm to protect the structural pattern (102) formed with the passivation layer (120); and
a passivation layer (120 a) formed on the other surface (101 a) of the base layer 100 a that faces the protective layer (130).
2. The metal member system of claim 1 , further comprising:
a protective layer (130 a) formed as a coated film having a thickness of 0.2 to 20 μm over the passivation layer (120 a).
3. The metal member system of claim 1 , wherein the passivation layers (120 and 120 a) are formed by a reaction with a passivation solution (110), in a state of immersing the base layer (100 a) to an Alcohol-based passivation solution (110) heated to a passivation treatment heat temperature (T1) in a range of 1 second to 30 minutes, and
the passivation treatment heat temperature (T1) is obtained by heating the passivation solution (110) in a range of 40° C. to a boiling point or in a range of 40° C. to 220° C.
4. The metal member system of claim 3 , wherein the passivation solution (110) is a substance obtained by mixing at least two or more selected from ethanol, methanol, isopropyl alcohol, butyl alcohol and octyl alcohol.
5. The metal member system of claim 3 , wherein the passivation layers (120 and 120 a) are formed by the reaction with the passivation solution (110) in a state of immersing the base layer (100 a) to the ketone-based passivation solution (110) heated to the passivation treatment heat temperature (T1) in a range of 1 second to 30 minutes, and
the passivation treatment heat temperature (T1) is obtained by heating the passivation solution (110) in a range of 40° C. to a boiling point or in a range of 40° C. to 220° C.
6. The metal member system of claim 5 , wherein the passivation solution (110) is a substance obtained by a mixture of any one or two or more selected from acetone, methyl ethyl ketone and methyl isobutyl ketone.
7. The metal member system of claim 1 , wherein the thickness of the passivation layers (120 and 120 a) is 0.005 to 0.5 times the thickness of the protective layer (130).
8. The metal member system of claim 1 , wherein a fingerprint prevention layer (140) is formed over the protective layer 130 by heat treatment for 1 to 30 minutes at a heat temperature of 40 to 120° C. after a fingerprint prevention solution obtained by mixing fluorine solvent and volatile solvent in a weight ratio of 1 to 3:7 to 9 is adsorbed onto the protective layer 130.
9. A method for manufacturing a metal member, the method comprising:
forming a structural pattern (102) on one surface (101) of a base layer (100 a);
forming passivation layers (120 and 120 a) by a reaction with a passivation solution (110) in a state of immersing the base layer (100 a) to Alcohol-based or ketone-based passivation solution (110) that is heated to a passivation treatment heat temperature (T1) in a range of 40° C. to a boiling point or in a range of 40° C. to 220° C. for 1 second to 30 minute; and
forming a protective layer (130) for protecting the structural pattern (102) on the passivation layer (120).
10. The method of claim 9 , further comprising:
forming a protective layer (130 a) over the passivation layer (120 a) of the other surface (101 a) on which the structural pattern (102) is not formed.
11. The method of claim 9 , wherein the passivation solution (110) is a substance obtained by mixing at least two or more selected from ethanol, methanol, isopropyl alcohol, butyl alcohol and octyl alcohol.
12. The method of claim 9 , wherein the passivation solution (110) is a substance obtained by a mixture of any one or two or more selected from acetone, methyl ethyl ketone and methyl isobutyl ketone.
13. A method for manufacturing a metal member, the method comprising:
forming a structural pattern (102) on one surface (101) of a base layer (100 a) made of magnesium or magnesium alloy;
forming passivation layers (120 and 120 a) by a reaction with a passivation solution (110) in a state of immersing the base layer (100 a) to Alcohol-based or ketone-based passivation solution (110) that is heated to a passivation treatment heat temperature (T1); and
forming a coated protective layer (130) for protecting the structural pattern (102) formed with the passivation layer (120).
14. The method of claim 13 , further comprising:
forming a coated protective layer (130 a) over the passivation layer (120 a) of the other surface (101 a) on which the structural pattern (102) is not formed.
15. The method of claim 13 , wherein the passivation solution (110) is a substance obtained by mixing at least two or more selected from ethanol, methanol, isopropyl alcohol, butyl alcohol and octyl alcohol.
16. The method of claim 13 , wherein the passivation solution (110) is a substance obtained by a mixture of any one or two or more selected from acetone, methyl ethyl ketone and methyl isobutyl ketone.
17. The method of claim 13 , wherein the time of immersing the base layer (100 a) in the passivation solution (110) is in a range of 1 second to 30 minutes.
18. The method of claim 13 , wherein the passivation treatment heat temperature (T1) is obtained by heating the passivation solution (110) in a range of 40° C. to a boiling point or in a range of 40° C. to 220° C.
Applications Claiming Priority (7)
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KR1020130114272A KR101398429B1 (en) | 2013-09-26 | 2013-09-26 | Method for manufacturing metal member |
KR10-2013-0114272 | 2013-09-26 | ||
KR10-2014-0006110 | 2014-01-17 | ||
KR10-2014-0006109 | 2014-01-17 | ||
KR1020140006110A KR101398432B1 (en) | 2014-01-17 | 2014-01-17 | Metal member |
KR1020140006109A KR101398431B1 (en) | 2014-01-17 | 2014-01-17 | Method for manufacturing metal member |
PCT/KR2014/008803 WO2015046846A1 (en) | 2013-09-26 | 2014-09-23 | Metal member and manufacturing method therefor |
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PCT/KR2014/008803 Continuation WO2015046846A1 (en) | 2013-09-26 | 2014-09-23 | Metal member and manufacturing method therefor |
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JP3962707B2 (en) * | 2003-06-12 | 2007-08-22 | 日新製鋼株式会社 | Silver-tone clear painted stainless steel sheet and method for producing the same |
JP2010005545A (en) * | 2008-06-27 | 2010-01-14 | Furukawa-Sky Aluminum Corp | Precoated metallic plate for electronic/electrical equipment |
JP5237080B2 (en) * | 2008-12-19 | 2013-07-17 | 古河スカイ株式会社 | Pre-coated metal sheet for electronic and electrical equipment |
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