KR20080052848A - Method for manufacturing the mobile communications terminal wrapping part, which and has a structure a vision with electrostatic discharge - Google Patents

Abstract

A fabrication method of a mobile communication terminal wrapping unit having an electrostatic discharge and nonconducting structure is provided to form a multilayer deposition film through a PVD(Physical Vapor Deposition) method on a window as maintaining existing color as it is by controlling a nonresistive value on the window, thereby improving electrostatic discharge. A multilayer deposition film(230) comprises as follows. A buffer film(232) deposits a silicon oxide on a window panel(231). A lower insulation film(233) deposits a high-refraction oxide of titanium dioxide on the buffer film. An upper insulation film(234) deposits a low-refraction oxide of silicon dioxide on the lower insulation film. An antistatic chrome film(235) processes chrome into a thin film to deposit the processed film on the upper insulation film.

Description

Method for manufacturing the mobile communications terminal wrapping part, which and has a structure a vision with electrostatic discharge}

1 is a view showing a state in which static electricity is injected into the terminal with an electrostatic gun as a conventional electrostatic discharge test,

2 is a cross-sectional view showing a window of a mobile communication terminal having a multilayer deposition film structure having an electrostatic discharge and a non-conductive structure according to an embodiment of the present invention;

3 is a detailed cross-sectional view showing a multilayer deposition film structure having an electrostatic discharge and a non-conductive structure according to an embodiment of the present invention;

4 is a flowchart illustrating a method of manufacturing a window of a mobile communication terminal having a multilayer deposition film structure having an electrostatic discharge and a non-conductive structure according to an embodiment of the present invention;

5 is a view showing a multilayer film deposition apparatus according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

200: window having an electrostatic discharge structure

210: liquid crystal display 220: screen printing film

230: multilayer deposition film 231: window panel

232: buffer film 233: lower insulating film

234: upper insulating film 235: antistatic chrome alloy film

240: acrylic substrate 500: multilayer film deposition apparatus

510: vacuum chamber 520: plasma ion beam

530: dome 540: electron beam

550: material loading crucible rotating plate 560: gas flow controller

570: halogen heater 580: thickness compensation plate

590: thermocouple

The present invention relates to a window placed on an upper portion of a screen display unit of a mobile communication terminal exterior part, and more specifically, to maintain a conventional color by controlling a resistivity value on a window, while using a physical vapor deposition (PVD) method. The present invention relates to a method and apparatus for manufacturing an exterior part of a mobile communication terminal having an electrostatic discharge and a non-conductive structure in which a multilayer deposition film is formed on a window to improve electrostatic discharge.

In the process of producing a terminal, various tests are performed to verify the terminal performance. Among them, there is an electrostatic discharge (ESD) test that measures the effect on the terminal by artificially generating static electricity and infiltrating the terminal.

The electrostatic discharge test includes a contact method for penetrating static electricity directly to the outer surface of the terminal, and a non-contact method for penetrating the static electricity to the terminal at a predetermined distance from the terminal.

For example, when setting the voltage of the static electricity penetrated into the terminal up to 20kV Looking at the results of the electrostatic discharge test, the contact method injects an electrostatic voltage of 8 ~ 10kV into the terminal. In addition, the non-contact method penetrates the terminal with an electrostatic voltage of 10-15 kV. Even if the static electricity is selected and penetrated by a part of the terminal, it is difficult to discharge or dissipate static electricity to the outside due to the influence of peripheral components.

In addition, since the static electricity penetrating into the terminal is often diffused together at one point, it may affect the components included in the terminal during the electrostatic discharge test.

Referring to FIG. 1, when the static electricity is penetrated into the liquid crystal display 10 using the electrostatic gun 13, the static electricity passes through the sub 12 and the main window 11 of the mobile communication terminal. To damage the liquid crystal display 10.

Meanwhile, due to the recent slimming trend, an antenna 14 installed outside the terminal is installed inside the terminal through an intenna method.

Therefore, when the conductive part is used inside the terminal, there is a problem that the reception sensitivity and the reception rate decrease due to the distortion of the reception frequency.

In order to improve the above-mentioned problems, various discharge tapes were attached around the sub and main liquid crystal display portions, but the discharge tapes were expensive and the production cost was increased.

In addition, a grounding sheet was attached between the inner surface of the terminal housing and the liquid crystal display module to prevent static electricity, and various elements and ground structures were formed on the printed circuit board. However, since the terminals manufactured and manufactured recently have been slimmer, additional components are added. There is a space limitation.

In the related art, a case, a keypad, a key top, a button, etc., which have conductivity, have been used in exterior parts of a mobile communication terminal. There was a problem that was impossible to use.

The present invention devised to solve the above problems, by controlling the resistivity value in the window to maintain the existing color, while forming a multilayer deposition film through the physical vapor deposition method on the window, it is possible to improve the electrostatic discharge A characteristic object of the present invention is to provide a method and apparatus for manufacturing a mobile communication terminal exterior part having an electrostatic discharge and a non-conductive structure.

In addition, the present invention is to maintain a specific resistance value of 20 ~ 500kΩ · m, it is possible to prevent damage to the liquid crystal display part due to electrostatic penetration during the electrostatic discharge test of the terminal.

In addition, the present invention, there is an object that can prevent the static electricity through the multilayer deposition film without additional space.

The liquid crystal display 210 to achieve the above object, the screen printing film 220 through screen printing to protect the multilayer deposition film 230 to be described later, and the multilayer deposition film 230 to maintain the color of the window 200 And, in the window 200 having an electrostatic discharge structure composed of an acrylic substrate 240 produced through a low temperature process, the multilayer deposition film 230, the window panel 231, and the silicon oxide (top) on the window panel A buffer film 232 for depositing SiO), a lower insulating film 233 for depositing a high refractive oxide of titanium dioxide (TiO ₂ ) on the buffer film, and a low refractive index of silicon dioxide (SiO ₂ ) on the lower insulating film An upper insulating film 234 for depositing an oxide, and an antistatic chromium alloy film 235 for depositing a chromium (Cr) alloy on the upper insulating film.

In addition, the multilayer deposition film 230 may include a window panel 231, a lower insulating film 233 for depositing a high refractive oxide of titanium dioxide (TiO ₂ ) on the window panner, and silicon dioxide (SiO) on the lower insulating film. ₂ ) an upper insulating film 234 for depositing a low refractive oxide.

On the other hand, a method of manufacturing a mobile communication terminal exterior parts having an electrostatic discharge structure, the method comprising: depositing a buffer film (232) made of silicon oxide (SiO) material; Forming a high refractive oxide of titanium dioxide (TiO ₂ ) to deposit a lower insulating film 233 on the buffer film; Forming a low refractive oxide of silicon dioxide (SiO ₂ ) to deposit an upper insulating film 234 on the lower insulating film; And depositing an antistatic chromium alloy film 235 on the upper insulating film by thin-processing the chromium (Cr) alloy. It characterized in that to perform.

In addition, a method of manufacturing a mobile communication terminal exterior part having a non-conductive structure, comprising: forming a high refractive oxide of titanium dioxide (TiO ₂ ) to deposit a lower insulating film 233 on the window panel 231; And forming a low refractive oxide of silicon dioxide (SiO ₂ ) to deposit an upper insulating film 234 on the lower insulating film. It characterized in that to perform.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

Prior to this, when it is determined that the detailed description of the known function and the configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, it should be noted that the detailed description is omitted.

A window having an electrostatic discharge and a non-conductive structure according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3 as follows.

2 is a cross-sectional view showing a window of a mobile communication terminal having a multilayer deposition film structure having an electrostatic discharge and non-conducting structure according to an embodiment of the present invention, Figure 3 is a static discharge and non-conductive diagram according to an embodiment of the present invention It is a detailed sectional drawing which shows the multilayer vapor deposition film structure which has a structure.

First, in the present embodiment, a window having a multi-layered deposition film of a mobile communication terminal exterior part having an electrostatic discharge structure is set to be described. However, the present invention is not limited thereto, and the case, keypad, key top, or key button of the mobile communication terminal are described. It can be used for all exterior parts.

As shown in FIG. 2, the window 200 having an electrostatic discharge structure includes a screen printing film 220 through screen printing to protect the liquid crystal display 210, the multilayer deposition film 230 described later, and a window ( It is composed of a multilayer deposition film 230 to maintain the color of the 200, and the acrylic substrate 240 produced through a low temperature process.

The window 200 maintains a specific resistance value of about 20 to 500 kΩ · m by forming the multilayer deposition film 230, and evenly passes through the multilayer deposition film 230 that penetrates when facing the static electricity generated from the electrostatic gun. It is absorbed and reflected to have the effect of electrostatic discharge. That is, the window including the conventional metal maintains a very low resistivity value, causing serious damage to the terminal when the static electricity is infiltrated.

In addition, the multilayer deposition film 230 can maintain the inherent reflection color of a conventional metal by using a physical vapor deposition method.

Referring to FIG. 3, the multilayer deposition film 230 will be described in detail. A window panel 231 made of plastic and a silicon oxide (SiO) oxide are deposited on the window panel 231. ) Film 232, a lower insulating film 233 for depositing oxide on the buffer film 232, an upper insulating film 234 for depositing oxide on the buffer film 232, and chromium (Cr) alloy The antistatic chromium alloy film 235 is formed by depositing a thin film on the upper insulating film 234.

In the present exemplary embodiment, in order to have an electrostatic discharge structure, the multilayer insulating film 230 deposits a high refractive oxide of titanium dioxide (TiO ₂ ) on the lower insulating film 233, and an upper insulating film on the lower insulating film 233. 234 deposits a low refractive oxide of silicon dioxide (SiO ₂ ).

Meanwhile, the multilayer deposition film 230 having a non-conductive structure includes a window panel 231 made of plastic, a lower insulating film 233 for depositing a high refractive oxide of titanium dioxide (TiO ₂ ) on the window panel 231. The low refractive oxide of silicon dioxide (SiO ₂ ) is alternately deposited on the lower insulating layer 233.

In addition, the window panel 231 is set to a plastic substrate such as polymethyl methacrylate (PMMA) and poly cabonate (PC) in a low temperature process, but the present invention is not limited thereto. It can also be used as a substrate.

Hereinafter, a window manufacturing process of a mobile communication terminal having a multilayer deposition film structure having an electrostatic discharge and a non-conductive structure will be described with reference to FIGS. 4 and 5.

4 is a flowchart illustrating a method of manufacturing a window of a mobile communication terminal having a multilayer deposition film structure having an electrostatic discharge and a non-conductive structure according to an embodiment of the present invention, and FIG. 5 is a multilayer film deposition apparatus according to an embodiment of the present invention. It is a figure which shows.

[ First Process-Pretreatment (S410) ]

First, as shown in FIG. 4, the multilayer deposition film 230 having the electrostatic discharge structure heat-treats the window panel 231 made of PMMA and PC material so that the thermal deformation temperature is 100 ° C. or higher (S411). A foreign substance including organic substances and air pollutants on the window panel 231 itself is removed by using a nitrogen gun for prevention (S412).

Next, referring to the multilayer film deposition apparatus 500 illustrated in FIG. 5, the window panel 231 is charged into a vacuum chamber 510 to have an internal pressure of 4.5 × E-5 Torr or less. The evacuation is carried out so that the degree of vacuum is When argon (Ar) gas and oxygen (O ₂ ) gas are flowed into the plasma ion beam (Ion-Beam, 520) by using the gas flow controller 560, the plasma (Plasma) mixed with the two gases (argon, oxygen) To form (S413).

That is, by performing the step S413, the moisture remaining in the window panel 231 can be removed, and the surface roughness can be improved.

At this time, in step S413, the window panel 231 is inserted into the multilayer film deposition apparatus 500 shown in FIG. 5 and proceeds for about 3 minutes. The energy of the plasma ion beam 520 is maintained at 150 eV, and the vacuum chamber is performed. The temperature of 510 is preferably maintained at 80 (± 2) ° C.

[The second step - the buffer layer deposition (S420)]

After performing the pretreatment step, the first process, silicon oxide (SiO), which is a buffer layer 232, is deposited.

In this embodiment, the material of the buffer film 232 is set to silicon oxide (SiO), but the present invention is not limited to the material.

[ 3rd process-lower insulating film deposition (S430) ]

After depositing silicon oxide (SiO) through the second process, an oxide having an insulating property is formed to deposit a lower insulating film 233 on the buffer film 232.

At this time, in order to have an electrostatic discharge structure, a high refractive oxide of titanium dioxide (TiO ₂ ) is deposited using a physical vapor deposition method.

In this embodiment, in order to form the lower insulating film 233, the dome 530 of the multilayer film deposition apparatus 500 is rotated at a constant speed (S431), and the material loading or rotating plate (using the plasma ion beam 550) ( After performing a soak process for removing impurities and moisture of the oxide contained in 550 (S432), when the vacuum degree inside the vacuum chamber 510 becomes 3.8 × E-5 torr, the lower insulating film 233 Is deposited.

In order to perform the third process, the internal temperature of the vacuum chamber 510 is 80 (± 2) ° C., the deposition rate of the oxide is 3.0˜8.0 μs / sec, and the gas flow controller 560 is adjusted to control the plasma ion beam ( The amount of oxygen (O ₂ ) delivered to 520 is maintained at a ratio of 18 to 22 sccm, and the anode voltage of the plasma ion beam 520 is 150 eV and the anode current is 7.5 to 8.0 A. The ACC voltage of the electron beam 540 is 7.5 kV, the emission current of titanium dioxide (TiO ₂ ) is 490 (mA), and the emission current of silicon dioxide (SiO ₂ ) is 180 (mA). It is preferable to set to), but it is obvious that it is changed by various variables according to the manufacturing process, and thus the present invention is not limited to the numerical values.

[Fourth step - depositing an upper insulating film (S440)]

After forming the low refractive oxide of silicon dioxide (SiO ₂ ) having insulating properties in the same manner in which the lower insulating film 233 is formed in the third process, the upper insulating film 234 is disposed on the lower insulating film 233. Deposit.

In the present exemplary embodiment, when the electrostatic discharge structure is formed, the lower insulating film 233 deposits high refractive oxide of titanium dioxide (TiO ₂ ), and the upper insulating film 234 is a low refractive oxide of silicon dioxide (SiO ₂ ). To form.

In the non-conductive structure, the lower insulating layer 233 deposits a high refractive oxide of titanium dioxide (TiO ₂ ), and the upper insulating layer 234 forms a low refractive oxide of silicon dioxide (SiO ₂ ).

[ 5th process-Antistatic chromium alloy film deposition (S450) ]

Finally, after the upper insulating film 234 is deposited through the fourth process, the chromium (Cr) alloy is thin filmed to deposit an antistatic chromium alloy film 235 on the upper insulating film 234.

That is, by depositing the antistatic chromium alloy film 235 through the fifth process, the specific resistance value is increased by about 12 ~ 13Ωm, and the reflectance is increased by 60 ~ 75% than conventional aluminum (Al). Therefore, it has a specific resistance value of 20 to 500 k? · M that can prevent damage to the main liquid crystal display part due to electrostatic penetration.

At this time, the amount of argon (Ar) gas and oxygen (O ₂ ) gas is determined using a gas flow regulator 560 at a ratio of 80:20 and transmitted to the plasma ion beam 520, and the antistatic chromium alloy film 235 is provided. The deposition rate of 3.8 ~ 4.0 Å / sec, the radiation current of the electron beam 540 is preferably maintained at 150 ~ 170mA, which is obviously to be changed by various variables depending on the manufacturing process, the present invention It is not limited to the numerical value.

The method and apparatus for manufacturing a mobile communication terminal exterior part having an electrostatic discharge and a non-conductive structure according to the present invention described above do not depart from the technical spirit of the present invention for those skilled in the art. Various substitutions, modifications, and changes are possible without departing from the scope of the invention and the accompanying drawings.

According to the present invention as described above, the present invention, as described above, by forming a multi-layered deposition film of the electrostatic discharged from the electrostatic gun during the electrostatic discharge test of the mobile communication terminal, rather than the existing metal, the metal inherent reflection color is maintained as it is While having a distinctive effect of discharging static electricity.

In addition, since the present invention does not occupy a separate space, the terminal can be made slim, and thus there is an effect not to be limited by space.

Claims (7)

Through the screen printing film 220 through screen printing to protect the liquid crystal display 210, the multilayer deposition film 230 to be described later, the multilayer deposition film 230 to maintain the color of the window 200, and a low temperature process In the window 200 having an electrostatic discharge structure composed of the acrylic substrate 240, The multilayer deposition film 230, A window panel 231, a buffer film 232 for depositing silicon oxide (SiO) on the window panel, a lower insulating film 233 for depositing high refractive oxide of titanium dioxide (TiO ₂ ) on the buffer film; And an upper insulating film 234 for depositing a low refractive oxide of silicon dioxide (SiO ₂ ) on the lower insulating film, and an antistatic chromium alloy film 235 for depositing a chromium (Cr) alloy on the upper insulating film. Mobile communication terminal exterior parts having an electrostatic discharge structure, characterized in that consisting of. Through the screen printing film 220 through screen printing to protect the liquid crystal display 210, the multilayer deposition film 230 to be described later, the multilayer deposition film 230 to maintain the color of the window 200, and a low temperature process In the window 200 having a non-conductive structure composed of the acrylic substrate 240, The multilayer deposition film 230, A window panel 231, a lower insulating film 233 for depositing a high refractive oxide of titanium dioxide (TiO ₂ ) on the window panner, and an upper portion for depositing a low refractive oxide of silicon dioxide (SiO ₂ ) on the lower insulating film Mobile communication terminal exterior parts having a non-conductive structure, characterized in that consisting of an insulating film (234). The method according to claim 1 or 2, The multilayer deposition film 230, A mobile communication terminal exterior part having an electrostatic discharge and a non-conductive structure, characterized by maintaining a resistivity of 20 to 500 kΩ · m. In the method of manufacturing a mobile communication terminal exterior part having an electrostatic discharge structure using the configuration according to claim 1, Depositing a buffer film 232 of silicon oxide (SiO) material; Forming a high refractive oxide of titanium dioxide (TiO ₂ ) to deposit a lower insulating film 233 on the buffer film; Forming a low refractive oxide of silicon dioxide (SiO ₂ ) to deposit an upper insulating film 234 on the lower insulating film; And Depositing an antistatic chromium alloy film 235 on the upper insulating film by thin-filming the chromium (Cr) alloy; Method for manufacturing a mobile communication terminal exterior parts having an electrostatic discharge structure, characterized in that for performing. In the method of manufacturing a mobile communication terminal exterior part having a non-conductive structure using the configuration of claim 2, Forming a high refractive oxide of titanium dioxide (TiO ₂ ) to deposit a lower insulating film 233 on the window panel 231; And Forming a low refractive oxide of silicon dioxide (SiO ₂ ) to deposit an upper insulating film 234 on the lower insulating film; Method for manufacturing a mobile communication terminal exterior parts having a non-conductive structure, characterized in that for performing. The method according to claim 4 or 5, Before the process of depositing the buffer film 232 or the lower insulating film 233, Heat-treating the window panel 231 made of PMMA and PC materials; Removing foreign matter from the window panel; And Forming a plasma; Method for manufacturing a mobile communication terminal exterior parts having a static discharge and non-conductive structure, characterized in that further performing. The method of claim 6, Forming the plasma, Charging the window panel to a vacuum chamber 510 to maintain an internal pressure of 4.5 × E-5 Torr or less; And Transmitting argon (Ar) gas and oxygen (O ₂ ) gas to the plasma ion beam 520 using the gas flow controller 560; Method for manufacturing a mobile communication terminal exterior parts having a static discharge and non-conductive structure, characterized in that further performing.

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