KR20110053940A - Black vacuum plating on bezel of a touch panel glass - Google Patents

Abstract

PURPOSE: A black collar vacuum plating method of bezel part of touch panel glass is provided to improve productivity and to reduce fault rate by preventing the short-circuit of an ITO pattern due to the thickness deviation between ITO pattern bed and a black color bed. CONSTITUTION: A black collar vacuum plating method of bezel part of touch panel glass comprises the next step. A coating target and a target material are formed in a chamber of vacuum condition. The target material is plated by applying voltage under reactive gas. The coating target is a touch panel glass(10). A black color bed(20) is formed in a bezel of the touch panel glass using a vacuum deposition method.

Description

BLACK VACUUM PLATING ON BEZEL OF A TOUCH PANEL GLASS}

The present invention relates to a black color coating of a bezel portion on the inner surface of a touch panel glass of an electronic device driven by a touch method, and more particularly to an electronic device driven by a touch method such as a mobile phone, a PDA, a tablet PC, and the like by using vacuum deposition. It realizes a black color with wear resistance and excellent quality at the bezel portion of the inner surface of the touch panel glass, and connects the indium tin oxide (ITO) pattern provided at the bezel portion with the side ends of the ITO patterns. The present invention relates to a black color vacuum deposition method of the touch panel glass bezel part which can prevent energization with the pattern of the metal wiring part and can prevent the short circuit of the ITO pattern in the process.

Hereinafter, the background of the present invention will be described with reference to the drawings of FIGS. 1 to 3.

1 is a schematic structural diagram of an electronic apparatus provided with a touch panel according to the related art. As shown in FIG. 1, an electronic device driven by a touch method is generally divided into an image display module 70 including an image panel, a light source, a driver, and the like, a touch panel that recognizes a signal by a touch, and other components. Are distinguished. In this case, the touch panel is provided on a display surface of an image display module 70 such as a cathode ray tube (CRT), a liquid crystal display (LCD), a plasma display panel (PDP), and an electroluminescent element (ELD). The device sends a position signal to a computer for desired information processing by touching.

The touch panel includes a resistance method, an electrostatic method, an SAW method, an infrared method, etc. according to a driving method, and a type of an electrostatic method is mainly used. The electrostatic method is a method of sensing and driving static electricity generated in a human body. In the past, in addition to the tempered glass 10 corresponding to the front surface of the product, the ITO pattern 30 is vacuumed inside the tempered glass 10. One or two separate inner glass plates for deposition were inserted to form the ITO pattern 30 on both sides or between the inner glass plates, and then assembled to complete the touch panel. However, since the thickness of the touch panel is increased as the above method, a recent method of vacuum depositing the ITO pattern 30 directly on the tempered glass 10 is used.

In this case, as shown in FIG. 1, the tempered glass 10 has an image display area in which an actual image is displayed on the inner surface so that the internal wiring or the metal electrode connecting the side end of the ITO pattern 30 is not visible. In addition to 40), a black color bezel part 50 is provided. According to the related art, the black color achieves the desired purpose of covering the internal wiring or the metal electrode by coating the black color layer 20 on the bezel part 50 using a film or silk screen printing technique. .

However, since the black color coating method according to the related art uses a film or a printing method, the thickness of the coated color layer corresponds to several μm to several tens of μm. On the other hand, as described above, the recent touch panel vacuum-deposits the ITO pattern 30 directly on the tempered glass 10 provided with the black color layer 20 on the black color bezel part 50 and the thickness thereof is several tens of nm. Is nothing.

Therefore, since the deviation due to the thickness difference between the black color layer 20 and the ITO pattern 30 layer is about 100 to 1000 times, the ITO pattern 30 is not properly formed when the ITO pattern 30 is formed. Short circuits occur frequently. This is because deposition on the side of the color layer is not well performed since the deposition direction by vacuum deposition has a straightness. Of course, the jig for mounting the coating object provided in the deposition equipment is capable of rotating or adjusting the angle, but in practice, the occurrence of short circuit still occurs frequently in the process.

2 and 3 will be described in more detail. 2 is a cross-sectional view in which a black color layer 20 and an ITO pattern 30 layer are formed on the black color bezel part 50 according to the related art. Since the black color layer 20 is conventionally formed by a film method or a silk screen printing method, as shown in FIG. 2, the thickness of the black color layer is significantly thicker than that of the ITO pattern 30 layer formed by the deposition method, and thus a large thickness variation. Has Meanwhile, the arrow direction indicates the deposition direction when the ITO pattern 30 is formed in the vacuum evaporator. As shown in the arrow, the arrow direction is not particularly well deposited in the area as shown in part A of FIG. 2.

3 is an enlarged view of a portion A of FIG. 2 and shows a state in which the ITO pattern 30 is short-circuited. As described above, due to the linearity of the deposition direction when the ITO pattern 30 is deposited, a short circuit occurs frequently because the ITO pattern 30 is not formed in a vertical plane such as the A portion of the ITO pattern 30. It shows how well it is done.

Meanwhile, the vacuum deposition method injects a reactive gas into equipment having a chamber capable of creating a high vacuum state, a cathode for emitting electrons by applying a voltage, a target material, a vacuum pump, a jig for mounting various objects, and the like. By controlling the process parameters such as time, deposition number, etc., the target material of metal or nonmetal is heated in vacuum to condense and attach the vapor generated from the piece to the surface of the object to be coated at a relatively low temperature. It is a method of completing a desired coating layer at a desired position.

The vacuum deposition method has been used in the prior art to simply coat the desired color, such as the case 60 of the various electronic devices did not have the characteristics of non-conductivity. In addition, although it has a non-conductive property, there was no application to the black color, and moreover, it was applied to the bezel part 50 on the inner surface of the touch panel glass 10 to solve the process defect due to the short circuit of the ITO pattern 30. At the same time, the vacuum deposition method of the black color with non-conductive properties was much less applicable. In the case of coating on electronic devices, it is very important to secure the characteristics of non-conductivity in order to prevent various electrical interference, in particular, the interference of communication devices.

An object of the present invention is to form a black color layer having a significantly thinner thickness than that of the conventional black color layer in the bezel portion of the inner surface of the touch panel glass by using vacuum deposition, thereby causing a thickness variation between the black color layer and the ITO pattern layer. It is to provide a way to significantly reduce the failure rate due to short circuit of the ITO pattern during the process.

In addition, the present invention, in addition to the above object, it is possible to prevent the electrical conduction between the metal electrode located in the bezel portion connecting the ITO pattern and the ITO pattern to have the non-conductive properties of the black color layer, durability and more The aim is to provide a better quality black color layer.

The present invention uses aluminum (Al), titanium (Ti), tin (Sn), molybdenum (Mo), silicon (Si) and combinations thereof or oxides or nitrides thereof as a target material, the degree of vacuum in the vacuum vapor deposition chamber, By adjusting parameters such as gas amount, DC power and deposition time, the bezel portion 50 on the inner surface of the touch panel glass 10 is significantly thinner than the black color layer 20 of the conventional method and has a non-conductive property. The color layer 20 may be provided.

For example, when using titanium (Ti) as a target, the vacuum degree inside the chamber of the vacuum evaporator is 6.0E-5, and 60 sccm (standard cubic centimeter per minute) is injected into the ion source, and the power is 250V. After 10 minutes of pretreatment, in the subsequent deposition process, argon gas was injected at 250sccm, acetylene at 200sccm, nitrogen at 50sccm to 55sccm, and DC power was maintained at 10.0kw for 1 hour and 30 minutes. It is intended to achieve the desired purpose by depositing with a black color having a.

According to the present invention, aluminum (Al), titanium (Ti), tin (Sn), molybdenum (Mo), silicon (Si) and combinations thereof or oxides or nitrides thereof are used as a target material, but in a vacuum deposition chamber By adjusting process variables such as vacuum degree, gas amount, DC power, and deposition time, the black color layer and the black color layer are provided in the bezel portion of the inner surface of the touch panel glass with a significantly thinner thickness than the conventional black color layer. The short-circuit of the ITO pattern, which is frequently generated due to the thickness deviation from the ITO pattern layer, can be solved, thereby reducing defects and attaining a significant productivity improvement.

In another aspect, the present invention provides a non-conductive black color layer to prevent the electrical current between the ITO pattern provided in the bezel portion of the inner surface of the touch panel glass and the pattern of the metal wiring portion connecting the side end of the ITO pattern and prevents the electronic device Electrical interference in the interior or jamming of communication equipment can be avoided. In addition, since very fine evaporated particles are deposited on the surface of the coating object, it can contribute to improving the appearance quality of the finished product by providing a black color with durability and excellent quality.

Moreover, the method using the printing technique in the prior art has a negative effect on the working environment due to the use of dyes, the present invention also has such an environmental improvement effect.

1 is a schematic structural diagram of an electronic apparatus provided with a touch panel of the related art
FIG. 2 is a cross-sectional view of portion CC ′ of FIG. 1.
3 is an enlarged view of a portion A of FIG.
4 is an exemplary view of forming a black color layer on the bezel portion of the inner surface of the touch panel glass according to the present invention.
5 is an exemplary view in which a black color layer is formed on a bezel portion of an inner surface of a touch panel glass according to the present invention.
6 is a cross-sectional view of the black color layer and the ITO pattern layer according to the present invention.

As described above, the short-circuit of the ITO pattern 30 due to the thickness variation between the black color layer 20 and the ITO pattern 30, which is a problem of the prior art, is prevented, and the black color of non-conductive, durable and beautiful color A method of providing the layer 20 to the bezel part 50 of the touch panel glass 10 will be described with reference to the accompanying drawings.

4 is a diagram illustrating a black color layer 20 formed on the bezel part 50 of the touch panel glass 10 according to the present invention. Arrow direction in the figure indicates the deposition direction in the vacuum evaporator. According to the present invention, the black color layer 20 having a thin thickness and non-conductivity should be formed on a desired portion. Before the coating object is mounted on the vacuum deposition jig, an image display area on the bottom surface of the touch panel glass 10 ( The shadow mask 80 is provided in 40 and integrated. Here, in addition to using the shadow mask 80, the entire surface of the touch panel glass 10 may be vacuum-deposited, and then the coating may be left only on a desired part by a method such as a pattern. Subsequently, when the integrated coating object is mounted on the coating jig of the evaporator and the deposition is carried out, a black color layer according to the present invention is formed on the bezel part 50 of the desired part, that is, the touch panel glass 10 as shown in FIG. The coating of 20) is completed.

At this time, the target material in the vacuum deposition process may be any one or a combination of aluminum (Al), titanium (Ti), tin (Sn), molybdenum (Mo), silicon (Si) and also the oxide or nitride of the metal material Can be used as a target material.

As an example, a case in which two metals of titanium (Ti) and silicon (Si) are used in combination or in combination is as follows.

<Example 1: Titanium (Ti) is used as a target>

First, the vacuum degree inside the chamber of the vacuum evaporator is 6.0E-5 and is subjected to pretreatment before deposition. In the pretreatment process, 60 sccm of argon gas is injected into the ion source, the power is 250 V, and the pretreatment time is 10 minutes. Thereafter, in the deposition process, 250 sccm of argon gas, 200 sccm of acetylene, and 50 sccm to 55 sccm of nitrogen were injected, and DC power was maintained at 10.0 kw to perform vacuum deposition for 1 hour 30 minutes.

<Example 2: Using Silicon (Si) as a Target>

First, the vacuum degree inside the chamber of the vacuum evaporator is 6.0E-5 and is subjected to pretreatment before deposition. In the pretreatment process, 60 sccm of argon gas is injected into the ion source, the power is 250 V, and the pretreatment time is 10 minutes. In the deposition process, 300 sccm of argon gas and 200 sccm of acetylene were injected, and the DC power was maintained at 5.5 kw to perform vacuum deposition for 1 hour and 40 minutes.

<Example 3: Using titanium (Ti) and silicon (Si) together>

Using two DC sputters, 20KW, one DC power is connected to a titanium (Ti) target, the other is connected to a silicon (Si) target, and the ion source pretreatment is performed at 6.0E-5. At this time, the ion source pretreatment condition is set to 250V power, argon gas at 60sccm and the ion source pretreatment time is 10 minutes. Immediately after the pretreatment, vacuum deposition is carried out. At this time, the vacuum deposition conditions are introduced into the argon gas, acetylene, nitrogen at the same time using each independent gas pipe, the argon gas is 250sccm, the acetylene is 200sccm, the nitrogen is 50sccm to 55sccm. Subsequently, when titanium is deposited for about 1 hour, a coating layer having a transmittance of about 5% to 15% of dark brown color is formed, wherein when silicon (Si) is deposited for 30 minutes after adding 400 sccm of argon, nonconductivity of 0% of transmittance is obtained. The black color layer 20 of the black color having the characteristic is coated.

Therefore, through the above process, a black color coating having a non-conductive property is formed on a desired portion, that is, the bezel part 50 of the touch panel glass 10. Furthermore, since the black color layer 20 is coated with fine evaporated particles on the surface of the coating object, the black color layer 20 has more excellent properties in terms of durability than the black color layer 20 of the film method or the printing method according to the prior art.

5 is a view after the black color layer 20 is formed on the touch panel bezel part 50 and the shadow mask 80 is removed according to the present invention. When the shadow mask 80 is removed after the deposition process is completed, the black color layer 20 is coated only on the bezel part 50 of the touch panel glass 10 as shown in FIG. 5. In this case, the coating layer has a thickness of several tens of nm. On the other hand, the method for forming the black color layer 20 on the bezel portion 50 of the touch panel glass 10, in addition to the above-described method i) a pattern on the coating object and the method of removing the pattern after vacuum deposition; ii) After vacuum depositing a certain part on the coating object, there is a method of leaving only the desired part by a technique such as a pattern.

6 is a cross-sectional view of the black color layer 20 and the ITO pattern 30 layer according to the present invention. As shown in the drawing, the black color layer 20 by vacuum deposition according to the present invention is remarkably thin because its thickness corresponds to several tens of nm. The short circuit in 30) does not occur.

As described above, the present invention forms the ITO pattern 30 by providing a black color coating layer having a thickness of several tens nm on the bezel part 50 of the inner surface of the touch panel glass 10 using a shadow mask 80 or the like. It greatly reduces the possibility of short-circuit time, and also secures non-conductivity to prevent the conduction and interference of the metal electrode and the ITO pattern 30 layer located in the bezel portion 50, and the film according to the prior art A black color layer 20 having better characteristics in terms of durability and the like than the black color layer 20 of a method or a printing technique is provided.

10: touch panel glass or tempered glass 20: black color layer
30: ITO pattern 40: image display area
50: black color bezel portion or bezel portion 60: assembly case
70: image display module 80: shadow mask

Claims (4)

In the vacuum deposition method in which a coating object, a target material, etc. are provided in a chamber in a vacuum state, and a voltage is applied to the target material in an atmosphere in which a reactive gas is injected.
The object to be coated is the touch panel glass 10, and the touch panel glass bezel part black is formed on the bezel part 50 of the inner surface of the touch panel glass 10 by vacuum deposition. Color vacuum deposition method.
The method of claim 1, wherein the target material is made of titanium (Ti), the vacuum degree inside the chamber of the vacuum evaporator is 6.0E-5, 60sccm injection of argon gas into the ion source, the power is 250V and the time is 10 minutes After the pretreatment process, 250 sccm of argon gas, 200 sccm of acetylene, 50 sccm to 55 sccm of nitrogen was injected, and DC power was maintained at 10.0 kw to perform vacuum deposition for 1 hour and 30 minutes to vision on the bezel part 50. The black color vacuum deposition method of the touch panel glass bezel portion, characterized in that to form a black color layer 20 having a characteristic.
The method of claim 1, wherein the target material is made of silicon (Si), the vacuum degree inside the chamber of the vacuum evaporator is 6.0E-5, 60sccm of argon gas is injected into the ion source, the power is 250V and the time is 10 minutes After the pretreatment process, 300 sccm of argon gas and 200 sccm of acetylene were injected, and the DC power was maintained at 5.5 kw to perform vacuum deposition for 1 hour and 30 minutes, thereby having a black color layer having non-conductive properties on the bezel part 50. A black color vacuum deposition method of forming a touch panel glass bezel, characterized by forming (20).
The method of claim 1, wherein the target material is a combination of titanium (Ti) and silicon (Si), using two DC sputters, one is connected to the titanium (Ti) target and the other is connected to the silicon (Si) target After the pretreatment process, the vacuum degree inside the chamber of the vacuum evaporator is 6.0E-5, the argon gas is injected 60sccm, the power is 250V, the time is 10 minutes, and the argon gas, acetylene and nitrogen are each independently Using a phosphorus gas pipe at the same time, the argon gas is 250sccm, the acetylene is 200sccm, the nitrogen is 50sccm to 55sccm and then the titanium (Ti) for about 1 hour to form a coating layer, then argon again The touch panel glass bezel part black is formed by adding 400 sccm and then depositing silicon (Si) for 30 minutes to form a black color layer 20 having non-conductive properties on the bezel part 50. Color vacuum deposition method.

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