KR20100003614A - Method for coating metallic ceramic film of cellular phone casing - Google Patents

Abstract

PURPOSE: A metal ceramic film coating method of a mobile phone case is provided to simplify the coating process by forming a transparent protective layer on the metal ceramic film after attaching a metal ceramic film without the primer coating. CONSTITUTION: A metal ceramic film coating method of a mobile phone case comprises the steps for closing a chamber door and selectively preheating a vacuum pump ventilation device after pre-processing a case material(c) without the primer coating and mounting the selected metal on a target; attaching the metal ceramic; and forming a transparent protective layer(a) by painting one of vinyl resin, emulsion resin, alkyd resins, amino-alkyd resin, polyurethane resin, acrylic resin, fluorine resin, aqueous resin, and ultra violet paint epoxy resin on the ceramic layer(b).

Description

Method for coating metallic ceramic film of cellular phone casing}

The present invention is a metal cell phone case (camera case, MP3 case, navigation case, electronic dictionary case, laptop case, etc.) formed by molding the first surface processing is carried out to the pretreatment for the deposition of the metal film without any work after the metal ceramics It is made by forming a transparent protective film on the surface after the deposition coating to improve the durability and water resistance, and to make excellent products capable of continuously exerting surface water repellency and oil repellent effect without fingerprint fingerprints remaining.

Conventional mobile phone inner and outer cases are made of polycarbonate (PC) material and coated with UV coating with pigments and dyes on their surfaces,

Finished with a thermoset paint or

Apply the initial coating on the surface of polycarbonate material and finish the protective coating by depositing a metal material selected from aluminum (Al), sus (SUS) and tin (Sn).

The case is made of metal selected from magnesium, aluminum, and zinc materials and commercialized as a means of finishing by applying high-temperature small-type paint after electroplating, chemical conversion, phosphate coating, chromate treatment.

However, these conventional products lack durability and are vulnerable to surface scratches, which are durable, slim, and lightweight, and cannot satisfy the consumer's desire for various designs. Reduction has the difficulty of achieving the goal.

The present invention can be omitted by coating a metal ceramic film and forming a transparent protective film thereon without coating on the surface of the mobile phone case is made of a metal, the puffing work or the primary processing is completed on the material surface and can be omitted It is to make an excellent product with excellent surface hardness and no fingerprint marks.

According to the present invention, the metal case is molded and subjected to pretreatment for deposition coating in a state where surface coating is omitted, and the metal ceramic film is deposited by ion plating method to form a transparent protective film on the outer surface for durability. In addition, it is possible to manufacture cheaper products with higher water resistance, no fingerprint marks, and excellent surface water / oil repelling effects.

According to the present invention as described above, after the puffing or pattern processing on the surface of the metal mobile phone case, the coating process can be omitted by performing pretreatment for deposition coating without depositing the coating and then depositing the metal ceramic film. It removes paint defects at the base and makes efficient production.

After pretreatment for deposition coating on the material without coating, the titanium plating (TiN), carbon titanium (TiC), carbon titanium (TiCN), titanium nitride (TiAlN), and chromium (Cr) ), By depositing a metal ceramic film (b) such as chromium nitride (CrN), and forming a transparent protective film (a) on the surface to finish the product can be obtained a product excellent in durability, water resistance, surface water repellent, surface oil repellent The product can be made without scratches or fingerprint marks, and the newly developed design is made possible by the light weight slimming, and the performance test shows the following performance.

* The criteria of test items in the performance test are as follows.

1) Accelerated Light Resistance Test Standard: Carbon Arc Accelerated Light Tester (CARBON ARC) should be free from discoloration and fading after 200 hours, GRAY SCALE Grade 3 or higher, and adhesion (M-2.5) or higher.

2) Heat cycle test standard: Infrared (80 ℃ (surface) and 75 ℃ (atmosphere) × 3Hr)-> Room temperature (1hr) .-> -40 ℃ × 2Hr with 1Cycle after 2Cycle No

3) Heat aging test standard: No significant discoloration, swelling, cracking, wrinkles or whitening after 80 ± 2 ℃ × 200Hr, and no peeling on the checkerboard tape test.

4) Initial adhesiveness test standard: After X-cutting at intervals of 1㎜, attach the tape tape and remove it sharply (5 times) No peeling in the checkerboard scale (1mm) test (10 × 10)

5) Abrasion resistance test standard: 280g load on paper tape (33 times / min)

6) Heat-resistant hot water test standard: 2mm interval checkerboard test after 4hr stand at room temperature for 30 minutes at 90 ± 2 ℃

The present invention is made of a metal, the surface pattern processing or the puffing process of the surface of the mobile phone case is completed, the bottom coating is omitted, and after performing a pre-treatment for the deposition coating metal ceramic film is deposited by the ion plating method and on the surface It is made by a method of forming a transparent protective film.

To this end, the present invention puts the cell phone case of the first processing is completed outside the chamber or inside the chamber for pre-treatment for deposition and by mounting the material (4) on the jig pole base (3) installed in the chamber titanium on the target 10 After selecting a metal selected from metals mixed with chromium, zirconia and titanium, close the chamber door and start the vacuum pump exhaust system (9) to maintain the vacuum in the chamber to 10 ^-6 ~ 10 ^-5 Torr (in the chamber The necessity of the vacuum is, for example, general chemical reactions such as 2H + O = H ₂ O, Na + Cl = NaCl, Fe + O = FeO, Fe ₂ O ₃ . It is necessary for a smooth deposition) by supplying a current to the heating coil (5) to selectively heat the material (4) temperature to 60 ~ 700 ℃ and by rotating the jig pole pole (3) with a rotary motor (1) Reactive gas (reactive gas is nitrogen, oxygen, carbon dioxide, methane, Quality cattle, selected from acetylene) 8 Kane the target (10, mixed in a predetermined ratio to put in 50 ~ 450 Sccm into the chamber 11 and maintain the degree of vacuum to 10 ^-4 ~ 10 ^-2 Torr) methods (6) When an arc is generated to ionize argon gas and a reactive gas to generate a plasma, and arc evaporation of a metal or a compound thereof from the target 10, the vapor phase atom is ionized by ionization in the plasma. 12), the surface of the material is stired violently to form a film to achieve metal ceramic deposition with a path of 50 to 100 times the wet plating hardness.

When the deposition of the metal ceramic film is completed, the coating material selected from vinyl resin, emulsion resin, alkyd resin, amino alkyd resin, polyurethane resin, acrylic resin, fluorine resin, water soluble resin, and UV paint is deposited on the deposited ceramic film (b). The ceramic coating is completed by performing a transparent protective coating by a coating method or by forming a transparent protective coating by an oxide deposition means.

On the other hand, the ion plating method carried out in the present invention

a) Electron Beam Ion Plating

b) Sputtering Ion Plating System

c) Arc Ion plating System

d) multi-arc ion plating

e) HCD ion plating (hollow cathod discharge) method may be used.

These methods are commonly tied to physical vapor deposition (PVD) because the process of changing from gas to solid when the material to be deposited is deposited on the workpiece is a physical change.

In ion plating, atoms and molecular particles evaporated in a vacuum state of 10 ^-5 to 10 ^-3 Torr are ionized while passing through a plasma region, and have strong energy such as sputtering.

This is because the ionized particles form a deposition film as compared to the vacuum evaporation method which has a deposit state that is simply evaporated and grown on the object, so that the film growth is formed while vigorously stirring the surface of the object.

Therefore, the ion plating method is different from the general deposition method because it forms a harder and dense film than a simple deposited surface.

Therefore, the present invention is to achieve the object by depositing a metal ceramic film using the arc ion plating method and forming a protective film on the surface.

Pretreatment process

The pretreatment process of the present invention is performed to minimize the deformation by suppressing the occurrence of thermal stress and transformation stress in the metal case during the deposition coating step, and the desired vacuum delivery time is increased by out gsaaing inside the workpiece. This is to shorten the phenomenon of increasing the process.

Therefore, the pretreatment process for the practice of the present invention

After completion of the puffing work and the formation of the pattern, the material (c) with primary processing is immersed in alcohol, IP, acetone, hydrocarbon-based organic solvents, TC vapor degreasing, organic compounds, and ultrasonic waves of 5 ~ 300KHz. Operate for 1 ~ 30 minutes to remove contaminants on the surface of the material

The material (c) is optionally annealed to 50-500 ° C. to complete the removal of the ideal gas on the surface and inside.

Meanwhile, the pretreatment means in the chamber is equipped with a material on the jig pole 3 of the chamber, and the vacuum in the chamber is made into 10 ^-6 to 10 ^-5 Torr, and 200-300 Sccm of argon gas is introduced into the chamber. Make the state 10 ^-4 ~ 10 ^-2 Torr and glow discharge to ionize argon gas

The ionized gas ions collide with the surface of the material 4 to remove the oxide film and the floating film on the surface by ion bombardment. This is called ion sputtering pretreatment.

In the atmosphere, Nitrogen-78%, Oxygen-21%, Argon-0.9% Carbon dioxide 0.03%, Neon0.0018%, Helium 0.0005 %, Krypton 0.0001% gases are present.

These gases are properly evacuated in the vacuum, but must be removed if there is water or dew point on the surface of the object, which will greatly affect the vacuum.

These factors affect vacuum time and film growth.

Vacuum process

After the puffing work is completed on the surface of the material (c), the metal cell phone case, which is a patterned work, is mounted on the jig pole for mounting the material in the chamber, and the target 10 is mixed with titanium, chromium, zirconium, and titanium. After mounting the selected metal

After installation of the material (4) is completed, the chamber door is closed and the vacuum pump exhaust device 9 is processed to forcibly evacuate the air in the chamber 11, whereby the vacuum is maintained. At this time, the vacuum degree is maintained at 10 ^-6 to 10 ^-5 Torr. .

The need for vacuum in the chamber

Examples include general chemical reactions such as 2H + O = H ₂ O, Na + Cl = NaCl, Fe + O = FeO, Fe ₂ O ₃ , to prevent unwanted chemical reactions as well as physical offset interference. Vacuum is required for smooth deposition.

In other words, since the vacuum mounting method is to blow the material to be deposited into a gaseous state, vacuum in the chamber is essential.

When the vacuum is completed, by supplying a current to the heating coil (5) which can selectively raise the temperature of the material (4) up to 60 ~ 700 ℃ to heat the material (4) and connected to the rotary shaft (2) of the rotary motor (1) Rotating the material by rotating the material mounting jig pole (3).

Deposition Process

The material 4 is selectively heated to a heating coil 5 in the chamber 11 to 60 to 700 ° C., and the argon (Ar) gas and the reactive gas 8 are mixed at a predetermined ratio, and then 50 to 450 Sccm into the chamber 11. Put in enough.

As the reactive gas, nitrogen (N 2), oxygen (O 2), carbon dioxide (CO 2), methane (CH 2), nitrous oxide (N 2 O), and acetylene (C 2 H 2) may be selectively used.

At this time, the degree of vacuum is maintained at 10 ^-4 to 10 ^-2 Torr, and arc generation occurs due to the plus trigger medium, and the argon (Ar) gas and the reactive gas are applied to the target 10 cathode (6) to which negative power is applied. It is ionized to generate plasma simultaneously.

Arc evaporation of a metal (or a compound thereof) from the target 10 causes ionization of the vapor phase atoms in the plasma. The ionized evaporation atom obtains high energy, and when negative voltage 12 is applied to the material 4 to be deposited, the film is grown while vibrating the surface of the material 4. The grown thin film has a hardness of 50 to 100 times the wet plating hardness.

Protective coating

The deposition surface on which the metal ceramic film is deposited is excellent in internal hardness, but is very vulnerable to fingerprints and oil components, so there is a problem to finish only by the deposition process, thus forming a protective film.

The protective film acts as a heat shield from outside, heat absorption, temperature display, ice adhesion prevention, anti-aging, radio wave blocking, friction coefficient change, mold prevention, insect prevention and sound absorption. do.

The protective film which can be used for this process is divided into the coating protective film by coating material and the deposition protective film by oxide.

In the case of coating protective film by paint, paint is made of vinyl resin (vinyl chloride, vinyl acetate copolymer and butylbutyllan), emulsion resin (acrylic, styrene, vinyl acetate) paint, alkyd resin and polyester (polyalcohol + polybasic acid). in a mixture) alkyd modified hansuji paint amino alkyd resin with a fatty acid (short-oil) and an amino group (Amide, Amine, Imide) an epoxy resin, an arc reel resin as coating material, baking-type coating material of a type heat-drying of a mixture of an amino resin having a , Polyurethane resin, silicone resin, fluorine resin, water-soluble resin. Polyurethane resin paint Prepolymer having isocyanate group (-N = C = O) and hydroxyl group (-OH) as functional group and urethane bond Paint with (-NHCOO-). Resin synthesized by radical polymerization using acrylic monomer (acrylic acid ether, methacrylic acid ether) as acrylic resin paint, fluororesin paint (painting fluorine resin CF bond) water soluble resin paint (alkyd, acrylic, epoxy, amino alkyd) Soluble ), UV paint It is a paint cured by ultraviolet rays (200 ~ 380nm) and thermal energy of electron beams, which are X-rays, and is made of epoxy type, urethane type, and unsaturated polyester type.

The paint is made of urethane paint, UV paint, UV paint, small paint, water-soluble paint, and the coating method is spray coating by robot coating, spindle coating, and recipe gate coating by auto gun. The seal is divided into 1st, 2nd, 3rd, and 4th through wet on wet.

On the other hand, the oxide deposition protective film is phosphorus (In), tin (Sn), phosphorus-tin oxide (ITO), zinc (Zn), zinc oxide (ZnO), tin oxide (SnO2), aluminum oxide (Al2O3), silicon dioxide ( SiO2), titanium oxide (TiO2), zirconia (ZrO2) Sn-Sb, SnO2-Sb2O3, ZnO + Al2O3, Ta2O5, Y2O3, AlN, Si3N4, SiAlON, Si, C, MgH ₂ A protective film can be formed by depositing continuously on a surface.

Therefore, the protective film formed on the metal ceramic deposition surface can protect the metal ceramic protective film by selectively using a paint type protective film and a transparent oxide film deposition protective film.

Example  (One)

Puffing work or pattern is formed on the surface of the cell phone case made of metal, the first processing is completed, the base material is omitted in the exterior material (c), by forming a metal ceramic deposition film (b) by the ion plating method Nitride metal films such as titanium nitride (TiN), carbon titanium (TiC), carbon titanium titanium (TiCN), aluminum titanium nitride (TiAlN), chromium (Cr), chromium nitride (CrN)) ceramics, and metal oxide films A metal ceramic film was deposited, and a protective film (a) made of paint was formed on the surface thereof to produce a product.

The case materials used were mobile phone case MP3 case camera case, electronic dictionary case, and laptop case.

The details of the examples are shown in the table below.

Example (2)

The metal ceramic deposition film (b) is pre-treated by ion plating method by omitting the base coating process in the interior and exterior materials (c) of the mobile phone case made of metal, which is formed with a puffing gloss work or pattern on the surface. Forming, such as titanium nitride (TiN), carbon titanium (TiC), carbon titanium (TiCN), aluminum titanium nitride (TiAlN), chromium (Cr), chromium nitride (CrN) ceramics, and oxidative metal coatings A protective metal film was formed by depositing the same metal ceramic film and depositing oxides such as phosphorus-tin oxide, zinc, zinc oxide, and tin oxide on the surface thereof.

The case materials used were mobile phone case MP3 case camera case, electronic dictionary case, notebook case.

1 is a cross-sectional view of the component layer of the present invention

2 is a process illustration of the present invention

Figure 3 is an exemplary deposition apparatus (ion plating) of the present invention

Figure 4 is an enlarged photograph of the deposited layer of the present invention.

* Explanation of symbols on the main parts of the drawings

1: rotation motor 2: rotation axis

DESCRIPTION OF SYMBOLS 3 Zig pole base 4 Material 5 Heating coil 6 Cathode 8 Reactive gas 9 Exhaust system 10 Target 11 Chamber 12 Negative voltage

Claims (5)

The case material (C), which is made of metal and has finished patterning and puffing, is pretreated outside or inside the chamber without any work, and is mounted on the jig pole (3) installed in the chamber after completion of pretreatment. After the metal selected from the mixed metals with zirconium and titanium is installed, close the chamber door and start the vacuum pump exhaust device (9) to maintain the vacuum degree in the chamber to 10 ^-6 ~ 10 ^-5 Torr and then the heating coil (5) Selectively preheating the material (4) temperature in the chamber to 60-700 ° C. by While rotating the jig pole stage 3 with the rotary motor 1, argon gas and reactive gas 8 are mixed at a predetermined ratio, and introduced into the chamber 11, and the vacuum degree in the chamber is maintained at 10 ^-4 to 10 ^-2 Torr. The target 10 generates an arc at the cathode 6 to ionize the argon gas and the reactive gas to generate a plasma, and arc-evaporates the metal from the target 10 to ionize the vapor phase atom in the plasma. A metal ceramic deposition step in which a negative voltage (12) is applied to the material surface to stir violently to form a film On the evaporation ceramic film (b), a transparent protective film is selected from vinyl resin, emulsion resin, alkyd resin, amino alkyd resin, polyurethane resin, acrylic resin, fluorine resin, water soluble resin and UV paint epoxy resin by general coating method. Metal ceramic film coating method of the mobile phone case comprising the step of forming (a) The method of claim 1, wherein the metal ceramic deposition method a) Electron Beam Ion Plating b) Sputtering Ion Plating System c) Arc Ion plating System d) multi-arc ion plating e) coating method of metal ceramic film on a mobile phone case, which is carried out by a method selected from HCD ion plating (hollow cathod discharge) deposition method. The method of claim 1, The pretreatment method is to immerse the case material (c) which has completed puffing or primary processing (wet plating) on the surface of the material in alcohol, IP, acetone, hydrocarbon-based organic materials, TC vapor degreasing and organic degreasing compounds outside the chamber. Operate 5 ~ 300KHz ultrasonic wave for 1 ~ 30 minutes to remove contaminants on the surface of the workpiece, and selectively anneal the material (c) to 50 ~ 500 ℃ to remove surface gas and abnormal gas, and material thermal stress and transformation Metal ceramic film coating method of a mobile phone case comprising a pretreatment means to minimize the deformation by suppressing the occurrence of stress The pretreatment method according to claim 1 comprises arranging the material (4) in the jig pole (3) and argon gas in the vacuum (10 ^-6 to 10 ^-5 Torr) in the chamber (11) into the vacuum chamber (20 to 300 Sccm). Glow discharge at a vacuum degree (10 ^-4 to 10 ^-2 Torr) to ionize the argon gas and impinge ionized gas ions on the surface of the material (4) to remove the oxide film and the floating film on the surface of the material (4). Metal ceramic film coating method of a mobile phone case comprising an etching pretreatment means The case material 4 made of metal and finished with pattern and puffing is installed on the jig pole base 3 installed in the chamber without any work, and the target metal is selected from metals mixed with titanium, chromium, zirconium and titanium. Close the chamber door and operate the vacuum pump exhaust device (9) to maintain the vacuum level in the chamber from 10 ^-6 to 10 ^-5 Torr, and then operate the heating coil (5) to raise the temperature of the material (4) in the chamber to 60 to 700 ° C. Optional preheating steps and While rotating the jig pole stage 3 with the rotary motor 1, argon gas and reactive gas 8 are mixed at a predetermined ratio, and introduced into the chamber 11, and the vacuum degree in the chamber is maintained at 10 ^-4 to 10 ^-2 Torr. The target 10 generates an arc at the cathode 6 to ionize the argon gas and the reactive gas to generate a plasma to arc-evaporate the metal from the target 10 to ionize the gaseous atoms in the plasma, and the material (4) A metal ceramic deposition step of applying a negative voltage (12) to the surface of the material by vigorously stirring to form a film Phosphorus (In), tin (Sn), phosphorus-tin oxide (ITO), zinc (Zn), zinc oxide (ZnO), tin oxide (SnO2), aluminum oxide (Al2O3), silicon dioxide on the deposited ceramic film (b) (SiO2), titanium oxide (TiO2), zirconia (ZrO2) Sn-Sb, SnO2-Sb2O3, ZnO + Al2O3, Ta2O5, Y2O3, AlN, Si3N4, SiAlON, Si, C, MaF ₂ Metal ceramic film coating method of a mobile phone case comprising the step of continuously forming a transparent protective film

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