KR101462620B1 - Method for manufacturing base metal - Google Patents

Method for manufacturing base metal Download PDF

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Publication number
KR101462620B1
KR101462620B1 KR1020140010024A KR20140010024A KR101462620B1 KR 101462620 B1 KR101462620 B1 KR 101462620B1 KR 1020140010024 A KR1020140010024 A KR 1020140010024A KR 20140010024 A KR20140010024 A KR 20140010024A KR 101462620 B1 KR101462620 B1 KR 101462620B1
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South Korea
Prior art keywords
passive
front housing
passivation
housing part
metal substrate
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KR1020140010024A
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Korean (ko)
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윤주식
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주식회사 위스코하이텍
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Priority to KR1020140010024A priority Critical patent/KR101462620B1/en
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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
    • 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
    • C23C22/73—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 characterised by the process
    • 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
    • C23C22/78—Pretreatment of the material to be coated
    • 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
    • C23C22/82—After-treatment

Abstract

The present invention is applicable to an external case, a housing, a back cover, and the like, which are made of metal such as a mobile phone, a notebook computer, and various electronic devices. Examples of such materials include magnesium, a magnesium alloy, aluminum, The surface of a metal base easily oxidizable such as a titanium alloy, a copper alloy, a copper alloy, a silver alloy, a silver alloy, etc., and a surface of a protective layer including a passivation layer Thereby enhancing corrosion resistance and shielding electromagnetic waves and the like.
In the present invention, a metal substrate having a front housing part and a middle frame part integrally formed is immersed in an alcohol-based or ketone-based passivation solution heated to a passive heat treatment temperature Forming a passive layer on the surface of the front housing part and the surface of the middle frame part by reaction with the passive solution; And forming a protective layer with a coating film to protect the surface of the front housing portion on which the passive layer is formed.

Description

[0001] METHOD FOR MANUFACTURING BASE METAL [0002]

The present invention is applied to an external case, a housing, a back cover, etc. (hereinafter referred to as "metal substrate") provided with a metal such as a cellular phone, a notebook, More specifically, it is possible to use a substrate made of an easily oxidizable metal such as magnesium, magnesium alloy, aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver, silver alloy The surface and structure patterns are made by applying surface treatment such as passivation layer and passivation layer to improve the durability and corrosion resistance and to shield electromagnetic waves. .

Recently, magnesium or magnesium alloy materials have been widely used in various fields such as automobiles, aircrafts, as well as computers, notebooks, cameras, and mobile phones, including various electronic products and electronic devices, because they are lightweight and excellent in electromagnetic wave shielding and heat dissipation.

However, in order to put materials such as magnesium and magnesium alloy having high oxidation resistance and low corrosion resistance into practical use, it is necessary to perform surface treatment separately to ensure durability for various internal parts and external parts.

On the other hand, the 'processing solution for magnesium alloy, the surface treatment method, and the magnesium alloy substrate' (referred to as Document 1) disclosed in Korean Patent Publication No. 2002-0077150 (October 11, 2002) It is known.

In reference to the above-mentioned document 1, it has been found that a magnesium alloy containing a phosphoric acid ion and a permanganate ion as a means for imparting paint adhesion, corrosion resistance and rust preventive property to a magnesium alloy and having a pH of 1.5 to 7 Liquid and surface treatment methods.

However, in such a conventional method, since the chemical liquor must be in a pH range of 2.0 to 4.0, which is a strong acidic treatment condition, if the pH of the chemical liquor exceeds 7, for example, And the reproducibility reliability of the coating is deteriorated, so that sufficient corrosion resistance and film adhesion can not be obtained.

According to an aspect of the present invention, there is provided a method for fabricating a semiconductor device, the method including: forming a protective layer including a passivation layer on a surface of a front housing part and a middle frame part of a substrate made of a metal, Which is capable of improving durability and corrosion resistance through a surface treatment for forming a metal base.

It is another object of the present invention to provide a metallic structure by forming various patterns of structures on the front or side surfaces of the front housing part.

Another object of the present invention is to protect the human body by shielding electromagnetic waves generated from a mobile phone, a notebook computer, various electronic devices, and the like by being provided with a conductive material.

As a method for solving the above-mentioned problems of the present invention, a metal substrate having a front housing part and a middle frame part integrally formed thereon is heated in an alcohol-based or ketone- (Passive layer) on the surface of the front housing part and the surface of the middle frame part by reacting with the passive solution in a state immersed in a ketone-based passivation solution. .

And forming a protective layer on the surface of the front housing portion on which the passive layer is formed, using a coating film.

According to another aspect of the present invention, there is provided a metal base body integrally provided with a front housing part and a middle frame part, wherein the front surface part or the side surface part of the front housing part has a structure And a step of forming a pattern is provided.

In addition, the metal pattern on which the structure pattern is formed may be immersed in an alcohol-based or ketone-based passivation solution heated to a passivation heat temperature to react with the passivation solution, And a step of forming a passive layer (passive layer) on the surface.

And forming a protective layer on the pattern of the structure on which the passive layer is formed with a coating film.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As described above, the present invention provides a method of manufacturing a semiconductor device, which can improve durability and durability by forming a passivation layer or the like on a surface of a front housing part and a middle frame part of a substrate made of a metal easily oxidizable, Corrosion resistance and the like.

In addition, the present invention provides another effect of further enhancing the product design by providing a metallic texture by forming a pattern of various shapes on the front surface or the side surface of the front housing part of the metal base.

Further, the metal base provided with the conductive material of the present invention provides another effect of protecting the human body by the function of shielding electromagnetic waves generated in a mobile phone, a notebook computer, various electronic devices, and the like.

1 is a perspective view of a metal substrate according to a first embodiment of the present invention.
FIG. 2 is a perspective view of a metal substrate according to a second embodiment of the present invention.
FIG. 3 is a view showing an example of a front part of a front housing part in FIGS. 1 and 2 according to the present invention.
4 is a perspective view of a third embodiment of the metal substrate according to the present invention.
FIG. 5 is a view showing a first embodiment of the rear portion of the front housing portion in FIG. 4 according to the present invention.
Fig. 6 is a second embodiment of the present invention showing the rear part of the front housing part in Fig. 4 according to the present invention.
FIG. 7 is a view showing a first embodiment of a process for manufacturing a metal substrate according to the present invention.
FIG. 8 is a view showing a second embodiment schematically showing a manufacturing process for a metal substrate according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the preferred embodiments of the present invention, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of example at least one embodiment, And should not be construed as limiting the scope of the present invention.

It is to be noted that the same reference numerals are used to denote the same elements in the drawings of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings shown in FIGS. 1 to 8 attached hereto.

The metal substrate 100 according to the present invention is applied to an external case, a housing, a back cover, and the like, which are made of metal such as a cellular phone or a notebook computer and various electronic devices. (Hereinafter referred to as "metal") as well as magnesium, magnesium alloy, aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver, silver alloy and the like.

The metal substrate 100 according to the present invention is characterized by being formed by various processing methods such as die casting, injection, extrusion, rolling, pressing, or etching by utilizing the above-mentioned materials .

In addition, the metal base 100 according to the present invention is applicable to the front surface housing 101, the surfaces 101a and 102a of the middle frame portion 102, the structure pattern 110, A surface treatment is performed to form protective layers 130a, 130-1a, and 130b including a passivation layer 120a, 120-1a, and 120b (also referred to as passivation layer) The metal substrate 100 can be provided with a metal texture and improved corrosion resistance, salt resistance, rust prevention property, paint adhesion, and the like, and furthermore, electromagnetic waves can be shielded.

In the present invention, the metal substrate 100 may be made of magnesium (Mg) alone or may be a metal such as Al, Cu, Ti, Ag, Ni, Si, Cr, Mn, Zn, Zr, , And Be (B).

In the present invention, the metal substrate 100 may be made of aluminum (Al) alone or may be a metal such as Mg, Cu, Ti, Ag, Ni, Si, Cr, Mn, Zn, Zr, , And Be (Al).

In addition, in the present invention, the metal substrate 100 may be made of copper (Cu) alone, or may contain at least one element selected from the group consisting of Mg, Al, Ti, Ag, Ni, Si, Cr, Mn, Zn, Zr, , And Be (B).

In the present invention, the metal substrate 100 may be made of titanium (Ti) alone, or may be made of a metal such as Mg, Al, Cu, Ag, Ni, Si, Cr, Mn, Zn, Zr, , And Be.

In the present invention, the metal substrate 100 may be made of Ag alone or may be made of a metal such as Mg, Al, Cu, Ti, Ni, Si, Cr, Mn, Zn, Zr, , Be, and a silver alloy selected from at least one of Ba and Be.

Further, in the present invention, when the thickness t1 of the metal substrate 100 is too thin, it is difficult to process a thin film through etching or the like, It is difficult to form the passivation layer 110 and the passive layers 120a and 120-1a and 120b. On the other hand, if the thickness t1 is too thick, the workability is easy, but the weight is increased and the required amount of material is also unnecessary This can be an increasing factor.

Therefore, it is preferable that the thickness t1 of the metal substrate 100 is selected according to the purpose, use, product, etc., including the chemical and physical properties and workability of the metal substrate 100.

The reliability test conditions for the metal substrate 100 according to the present invention include a constant temperature and humidity test conducted at a temperature of 60 DEG C and a humidity of 90% for 240 hours, a temperature of -40 DEG C for 30 minutes to 80 DEG C for 30 minutes The surface treatment technology of the surface treatment technique is important because it is required to be free from deformation or deterioration in a cold temperature thermal shock test carried out over 100 cycles to a long period of time and a salt water test carried out for 5 hours to 120 hours of brine.

The construction means of the metal base 100 for solving the problems according to the present invention and one embodiment thereof will be described in detail with reference to the accompanying drawings.

First, as shown in FIGS. 1, 3 to 5, and 7, a first embodiment of the present invention will be described. In the metal substrate 100, the screen 150 is provided by the above- And a middle frame portion 102 to which various components or substrate members are fastened and fixed.

 The metal substrate 100 may be heated (or referred to as "heating") in the solution bath 300 by a separate heating means such as a burner or a heater (Hereinafter also referred to as "dipping") in an alcohol-based or ketone-based passivation solution 200, A step of forming passivation layers 120a and 120b on the surface 101a of the housing part 101 and the surface 102a of the middle frame part 102 is provided.

The protective layer 130a may be formed on the surface 101a of the front housing part 101 on which the passive layer 120a is formed.

As shown in FIGS. 2 to 4, 6, and 8, the second embodiment of the present invention will be described with reference to FIGS. 2 to 4. And a middle frame portion 102 to which various components or substrate members are fastened and fixed.

A plurality of patterns 110 may be formed on the front surface 101a of the front housing part 101 or the side surface of the front housing part 101. The structure pattern 110 may be formed, And a depth D1 of 0.01 to 20 mu m successively in the same or non-identical period (period).

For example, as shown in FIGS. 2, 6 and 8, the structure pattern 110 may be formed by physical or chemical means such as laser processing, cutting, grinding, etching, sandblasting, It means to visualize various shapes such as a hairline, an image, an image, and a logo.

The structure pattern 110 constructed as described above includes a hair line formed by successively forming the mountain 110-1 and the valley 110-2 at the same or non-identical cycle as shown in FIG. 8 The hair line included in the structure pattern 110 may be formed in a period of 10 to 400 cycles within an interval of 1 cm between the mountains 110-1 and the valleys 110-2.

In other words, in the hairline structure pattern 110, the mountain 110-1 and the valley 110-2 are spaced apart by 1 cycle apart from each other by 10 cycles or less, that is, If the number of the teeth is less than 5, the metal texture may be deteriorated due to too loose spacing, and the design may be deteriorated. On the other hand, If the number of the mountains 110-1 or the valleys 110-2 is densely formed to be more than 400 cycles in the interval, the metal texture or the design property. But it may be a factor that increases the time and cost for polishing or processing it. Therefore, it is preferable to form about 200 cycles within 1 cm interval in consideration of this point. However, in the present invention, More preferably 400 cycles.

In addition, although not shown in the figure, the structure patterns 110 may be formed by a combination of concave and convex shapes of the same or unequal size as a front housing part (not shown) (101a) of the front surface portion or the side surface portion of the substrate (101).

For example, the figure included in the structure pattern 110 may include various shapes such as a circle, a triangle, a square, a pentagon, a hexagon, a diamond, and the like. In this case, the figure includes 4 to 400 concave or convex portions in 1 cm 2.

In other words, if the number of concave portions is reduced to four or less, the metal texture may be deteriorated due to a too rough configuration, which may result in deterioration in design. On the other hand, In the case of forming too much densely over 400 pieces, it is advantageous in metal texture, design, sophistication, etc. However, since it can increase time and cost for polishing or processing In view of this point, it is preferable to form 200 or less, but in the present invention, it is more preferable to form 4 to 400 pieces.

Although not shown in the drawings, the image pattern may be formed by a combination of concave and convex structures of the front housing part 101 provided on the metal base 100, And may be configured to be disposed on the surface 101a of the front surface portion or the side surface portion.

For example, the image included in the structure pattern 110 may include plants such as flowers, leaves, and trees, insects such as butterflies and bees, animals such as dogs and pigs, You can include it. This is also not to be limited to the images listed above.

In addition, although not shown in the figure, the logo may be formed by a combination of concave and convex on one or more of the front housing part 101 provided on the metal base 100 And may be configured to be disposed on the surface 101a of the front surface portion or the side surface portion.

For example, the logo included in the structure pattern 110 may include a name of a company, a school name, a school name, a shop name, a club name, a local government name, etc., but may also include a person's name or business card, It should not be limited to.

In the meantime, although not shown, the structure pattern 110 according to the present invention can be used as a means for further enhancing the metal texture and the sense of design, by using any of the shapes, images, and logos based on the aforementioned hair line. Or a combination of a concave and a convex, or a combination of a concave and a convex by selecting at least two of a figure, an image, and a logo. have.

At this time, the figure, image, and logo are formed to protrude at a height of 0.01 to 0.6 mm from the surface 101a of the front housing part 101 formed with the basic hair line, thereby visually differentiating the hair line from the hair line It would be desirable to have them.

Further, the surface (not shown) of the protruding figure, image, and logo is mirror-finished or hatching to distinguish the hair line from the hair line, It would be desirable to give it.

For example, if the protruding height of the figure, image, and logo is less than 0.01 mm, there is a fear that the visual sense may be deteriorated because the hair line formed as the basic background is not distinctively differentiated. On the other hand, The surface 101a of the front housing part 101 provided on the metal substrate 100 may be damaged due to a severe protrusion. However, if the front surface 101a of the front housing part 101 is too thick, In consideration of this, it is preferable to form the protrusion at a height of 0.01 to 0.6 mm in the present invention.

In the present invention, it is obvious that the concave and convex portions included in the structure pattern 110 mentioned above may be expressed or formed with a concave angle and a convex shape.

In addition, in the present invention, the depth D1 for the above-mentioned structure pattern 110 is formed to be 0.01 to 20 μm from the surface 101a as shown in FIG.

At this time, when the depth D1 of the structure pattern 110 is shallowly formed to be less than 0.01 탆, it is difficult to divide the depth D1 by the naked eye, that is, the view, and the metal texture may be deteriorated. On the other hand, The surface 101a of the front housing part 101 may be damaged. Therefore, it is preferable that the present invention is formed with a depth D1 of 0.01 to 20 탆 .

Next, the metal substrate 100 on which the structure pattern 110 is formed is heated (or heated) to the passivation heat temperature T1 in the solution tank 300 by a separate heating means such as a burner or a heater (Also referred to as "dipping") in an alcohol-based or ketone-based passivation solution 200, (Passivation layer) 120-1a and 120b on the surface 102a of the structure pattern 110 and the middle frame portion 102 by a reaction between the passivation layer 120-1 and the passivation layer 120b.

The protective layer 130-1a may be formed on the structure pattern 110 on which the passivation layer 120-1a is formed by using a coating.

7, the protective layer 120a is formed on the front surface 101a of the front housing part 101. The protective layer 120a is formed on the surface 101a of the front housing part 101, (Metal) texture to the metal substrate 100, thereby improving the durability, corrosion resistance, corrosion resistance, and the like including transparency, and further enhancing the corrosion resistance of the metal substrate 100 from the ultraviolet rays. Further, Thereby providing various protection functions for preventing degeneration of the metal base 100 and scratching of the surfaces 101a and 102a.

8, as a means for protecting the structure pattern 110 formed with the passive layer 120-1a from damage and implementing the structure pattern 110 well, The protective layer 130-1a is formed with a coating film (coating film) of 20 mu m.

7 and 8, the present invention is applied to the surface 102a of the middle frame portion 102 where the passivation layer 120b is formed by using a coating film having a thickness of 0.2 to 20 占 퐉, (130b) as a single layer or a multi-layer, thereby providing a protective function for improving the durability and corrosion resistance of the metal substrate (100).

The protective layers 130a, 130-1a, and 130b of the present invention may be formed of a paint comprising a transparent or colored resin (also referred to as a "color resin").

The protective layers 130a, 130-1a, and 130b of the present invention may be used as a means for imparting various colors to the metal substrate 100 or for increasing the metal texture, and may include a paint (paint) composed of white or colored pigment materials, As shown in FIG.

The pigment material may include at least one or more mineral natural inorganic pigments such as gold, silver, nickel, zinc, titanium, iron, copper, chromium and the like in an environmentally friendly manner to allow the metal substrate 100 to be removed from strong ultraviolet rays It is desirable to have resistance to weathering, and to have resistance to weathering which prevents discoloration or discoloration.

For example, among the pigment materials, white pigments include TiO 2 (titanium dioxide) having a chemical property stable and non-toxic, particularly a refractive index and coloring power against an acid or ancholy, and a refractive index ranging from 2.50 to 2.75, It should not be limited to the cases listed above.

Of the pigment materials, ZrO 2 (zirconia), ZnO (zinc oxide), BiOCl (bismuth oxide chloride) having a refractive index of 1.8 or more, SiO 2 (silicon dioxide) having a refractive index of 1.8 or less, MgF 2 (magnesium fluoride) Al 2 O 2 (alumina), which should not be limited to the examples listed above.

Among the above-mentioned colored pigments, various colors such as BLACK, RED, BLUE, PINK, VIOLET, YELLOW and the like which are harmless to the human body including carbon black and chromium oxide green, And the like.

As the means for forming the protective layers 130a, 130-1a, and 130b, the coating layer may be formed by any one of electrodeposition coating method, synthetic resin coating method, powder coating method, and electrostatic coating method using the above- (Coating) treatment, but this should also not be limited to the cases listed above.

On the other hand, when the thickness of the protective layers 130a, 130-1a, and 130b is 0.2 탆 or less, the fine structure pattern 110 can be realized well, If the thickness is thicker than 20 탆, durability and corrosion resistance are excellent. However, there is a possibility that the degree of implementation of the fine structure pattern 110 may be lowered In addition, the reflected light of light from the outside may interfere with each other, which may degrade the texture of the detailed structure pattern 110.

Therefore, the thickness of the protective layers 130a, 130-1a, and 130b depends on the chemical and physical characteristics of the metal substrate 100, that is, the material including the metal, It is preferable to suitably select and form it so that it is not too thin or thick in the range of 0.2 to 20 mu m.

7, the thicknesses of the passive layers 120a and 120b formed on the front surface 101a of the front housing part 101 and the front surface 102a of the middle frame part 102 in the present invention, Which is 0.005 to 0.5 times the thickness of the protective layer 130a formed of a coating film having a thickness of 0.2 to 20 mu m, that is, 0.001 to 10 mu m.

8, the thickness of the passive layer 120-1a formed on the structure pattern 110 is 0.005 to 0.5 times the thickness of the protective layer 130-1a formed to 0.2 to 20 占 퐉. And is formed in a range of 0.001 to 10 mu m.

In other words, when the thickness of the passive layer 120a and the passive layer 120b is less than 0.001 mu m, the surface of the front housing part 101 and the surface of the middle frame part 102, which are provided on the metal base 100, (Or an "oxide film") is formed too thin, corrosion resistance may be deteriorated. On the other hand, when the thickness of the oxide film is increased to 10 μm or more It is possible that the surface 101a and 102a may be severely damaged.

In addition, when the thickness of the passivation layer 120-1a is less than 0.001 占 퐉, the structure of the passive layer 120-1a is less damaged and the metal texture is improved. However, The corrosion resistance may be deteriorated because the oxide film is formed too thin. On the other hand, if the thickness of the oxide film is thicker than 10 탆, the corrosion resistance may be excellent, but the fine structure pattern 110 may be damaged.

Therefore, the thickness of the passive layer 120a, 120-1a, 120b in the present invention depends on the material of the metal substrate 100, the depth D1 at which the structure pattern 110 is formed, Depending on the type of the reactive material, the time of immersion, and the like, but it is preferable to form the thickness of the passivation solution to 0.001 to 10 탆 .

In the present invention, passive layers 120a, 120-1a and 120b are formed on the surface 101a of the front housing part 101, the surface 102a of the middle frame part 102 and the structure pattern 110 The passive solution 200 included in the means for providing the oxidizing film includes ethanol, methanol, isopropyl alcohol, butyl alcohol, octyl alcohol, Octyl alcohol), or a volatile alcohol-based material obtained by mixing two or more of them.

In addition, the passive solution 200 may be a volatile ketone system mixed with one or more selected from the group consisting of acetone, methyl ethyl ketone, and methyl isobutyl ketone ≪ / RTI > material.

In the present invention, passive layers 120a, 120-1a and 120b are formed on the surface 101a of the front housing part 101, the surface 102a of the middle frame part 102 and the structure pattern 110 The passivation process heat temperature T1 included in the means for causing the passivation solution 200 to pass through the passive solution 200 of the alcohol-based or ketone-based material filled in the solution tank 300 at 40 ° C to boiling point It may be preferable to heat it in the range of "boiling point"), thereby facilitating the reaction for forming the passive layers 120a, 120-1a and 120b.

The passivation process heat temperature T1 may be obtained by heating the passive solution 200 of an alcohol or ketone based material filled in the solution tank 300 to 40 to 220 ° C, 120a, 120-1a, 120b) in the reaction chamber.

For example, when the passivation heat temperature T1 is set to 40 ° C or less, the reaction of the passive solution 200 is lowered so that the surface 101a of the front housing part 101 and the surface of the middle frame part 102 The passivation layers 120a, 120-1a and 120b may not be densely formed on the structure patterns 110a and 120a and the structure pattern 110. On the other hand, when the passivation process heat temperature T1 is higher than the boiling point or 220 deg. It is economically disadvantageous because evaporation of the passive solution 200 composed of an alcohol- or ketone-based volatile material is serious due to a large amount of evaporation, and uniform passivation layers 120a, 120-1a and 120b are formed There is a possibility that it will not be.

In other words, the boiling points of the alcohol-based reactants included in the passivation solution 200 are 78.3 ° C for ethanol, 64.65 ° C for methanol, 82 ° C for isopropyl alcohol, 117.7 ° C for butyl alcohol, The boiling point of the ketone-based reactant contained in the passive solution 200 is 56.5 ° C .; the methyl ethyl ketone is 79.6 ° C; and the methyl isobutyl ketone is 115.9 ° C. Therefore, in the present invention, The passivation heat temperature (T1) is appropriately selected from 40 ° C to the boiling point or in the range of 40 to 220 ° C depending on the type of reactant to be formed by selectively selecting one of them or by mixing two or more kinds thereof Lt; / RTI >

In the present invention, passive layers 120a, 120-1a and 120b are formed on the front surface 101a of the front housing part 101, the front surface 102a of the middle frame part 102 and the structure pattern 110 For example, the time for immersing the metal substrate 100 in the passive solution 200 heated to the passivation heat temperature T1 may be determined depending on the kind of the alcohol-based or ketone-based reactant mentioned above But it is characterized in that it is immersed in the range of 1 second to 30 minutes.

For example, when the time for immersing the metal substrate 100 in the passive solution 200 is set to be too short as less than 1 second, the reaction of the passive solution 200 may be lowered and the surface 101a of the front housing part 101 may be damaged. There is a possibility that the passive layers 120a, 120-1a and 120b are not formed densely in the structure pattern 110 as well as the surface 102a of the middle frame part 102. On the other hand, The passivation layers 120a, 120-1a and 120b have a high density, but the process time for forming the passivation layers 120a, 120-1a and 120b, that is, the passivation process is unnecessarily long, It may be preferable to select the present invention within the range of 1 second to 30 minutes.

The passivation layers 120a, 120-1a and 120b of the present invention thus formed are improved in corrosion resistance against the metal substrate 100 and are coated on the protective layers 130a, 130-1a and 130b, (Metal) quality of the metal substrate 100 of the present invention, including corrosion resistance and rust resistance, is further improved by the application of the coating film .

Meanwhile, in the present invention, before the metal substrate 100 is immersed in the solution tank 300 filled with the passive solution 200, a sufficient degreasing and cleaning process is performed to remove foreign substances adhering to the surfaces 101a and 102a It would be desirable to remove it.

In other words, if foreign substances are present on the surface 101a of the front housing part 101 and the surface 102a of the middle frame part 102 of the metal base 100, the passive solution 200 Is not uniformly applied to the whole, it may eventually have a bad influence on the formation of the dense and stable passivation layers 120a, 120-1a, and 120b.

Subsequently, the passivation layers 120a, 120-1a and 120b are formed by immersing the metal substrate 100 in the passive solution 200 for 1 second to 30 minutes as described above, (300) and drying it.

For example, the passive solution 200 may be naturally dried at room temperature because the passive solution 200 is a volatile material. However, it may be preferable to dry the passive solution 200 by infrared or hot air at a temperature of 20 to 60 ° C.

Alternatively, in the present invention, the passivation layers 120a, 120-1a, and 120b may be formed by immersing the metal substrate 100 in the passive solution 200 for 1 second to 30 minutes, (120a, 120-1a, 120b), that is, adhesion to the oxide film (for example, at a temperature of 40 to 200 占 폚) by drying the metal substrate 100, It is preferable to provide stabilization or stabilization.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention.

Therefore, the technical scope of the present invention should be defined by the claims of the present invention, rather than being limited to those described in various exemplary embodiments as mentioned above.

100: metal substrate
101: front housing part
102: Middle Frame section
101a, 102a: surface
110: Structure Pattern
110-1: Mountain
110-2: Goals
120a, 120-1a, 120b: passive layer
130a, 130-1a, and 130b:
150:
200: Passive solution
300: solution tank

Claims (12)

A metal base 100 integrally provided with a front housing part 101 and a middle frame part 102;
The passivation solution 200 is immersed in a ketone-based passivation solution 200 heated to a passivation heat temperature T 1 ranging from 40 ° C. to a boiling point of the metal substrate 100. Forming passive layers (120a, 120b) on the surface (101a) of the front housing part (101) and the surface (102a) of the middle frame part (102a) by a reaction;
And forming a protective layer (130a) on the surface (101a) of the front housing part (101) on which the passive layer (120a) is formed by using a coating film. delete A metal base 100 integrally provided with a front housing part 101 and a middle frame part 102;
A pattern 110 is formed on a surface 101a of a front or side surface of a front housing part 101 included in the metal base 100;
The metal substrate 100 on which the structure pattern 110 is formed is immersed in a ketone-based passivation solution 200 heated to a passivation heat temperature T1 of 40 ° C to a boiling point, Forming passivation layers 120-1a and 120b on the surface 102a of the structure pattern 110 and the middle frame part 102 by reaction with the passivation solution 200;
And forming a protective layer (130-1a) on the structure pattern (110) on which the passivation layer (120-1a) is formed by using a coating film. The method of manufacturing a metal base according to claim 3, wherein the structure patterns (110) are formed to have a depth (D1) of 0.01 to 20 탆 successively in the same or non-identical period. 4. The method of claim 3, wherein the thickness of the passive layer (120-1a, 120b) formed on the surface (102a) of the structure pattern (110) and the middle frame part (102) -1a) is 0.005 to 0.5 times the thickness of the metal substrate. delete delete 4. The method of manufacturing a metal substrate according to any one of claims 1 to 3, wherein the passive processing heat temperature (T1) is obtained by heating a passive solution (200) of a ketone system having volatility to 40 to 220 캜 Way. delete 4. The method of claim 1 or 3, wherein the ketone-based passivation solution 200 on which the metal substrate 100 is immersed is selected from the group consisting of acetone, methyl ethyl ketone, methyl isobutyl ketone Methyl Isobutyl Ketone) is mixed with one or more selected from the group consisting of the above-mentioned materials. delete delete
KR1020140010024A 2014-01-28 2014-01-28 Method for manufacturing base metal KR101462620B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006063392A (en) * 2004-08-26 2006-03-09 Seiko Epson Corp Oxide film formation method, oxide film, parts and electronic equipment
KR20090036133A (en) * 2006-07-25 2009-04-13 바스프 에스이 Method of passivating metallic surfaces by means of copolymers having phosphoric and/or phosphonic acid groups

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006063392A (en) * 2004-08-26 2006-03-09 Seiko Epson Corp Oxide film formation method, oxide film, parts and electronic equipment
KR20090036133A (en) * 2006-07-25 2009-04-13 바스프 에스이 Method of passivating metallic surfaces by means of copolymers having phosphoric and/or phosphonic acid groups

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