KR20090025473A - Three dimensional coating system using physical vapor deposition - Google Patents

Abstract

A three-dimensional coating apparatus employing physical vapor deposition is provided to coat an object uniformly regardless of its external shape by rotating the jig in order to form uniform coating on the side surface of the object and moving the deposition unit up and down in order to form uniform coating on the top and bottom surfaces of the object. A three-dimensional coating apparatus employing physical vapor deposition comprises a chamber(20) of cylindrical or hexahedral shape providing the internal space; a rectangular carriage(30) fixed to the bottom in the chamber; a plurality of jigs(40) which is combined with a connection part(41) on the upper side of the rectangular carriage, rotates along with the rotation of the connection part driven by a motor installed in the chamber, and fixes a coated object; and a deposition unit(50) provided on both sides of the chamber to be movable up and down.

Description

Three Dimensional Coating System Using Physical Vapor Deposition

The present invention relates to an apparatus for three-dimensional coating using a deposition apparatus such as a magnetron sputter or a cathodic arc among physical vapor deposition (PVD) apparatuses widely used in semiconductor, LCD, and industrial coatings.

In general, the sputtering coating process is used to form various thin films such as metal wirings, barrier layers, transparent electrodes, optical films, and the like in the fields of semiconductors, displays, and circuit boards. The sputtering coating process is a kind of physical vapor deposition method in which particles of the same material as a thin film to be deposited on a substrate are deposited by various physical methods in a vacuum, and an inert gas such as argon (Ar) is injected in a vacuum state. In the present invention, plasma is discharged around a target by applying a high voltage to a target made of a metal or a metal compound, so that the cations in the plasma discharge region strike the target surface by electric force and release atoms to coat the atoms on the substrate.

The sputtering coating process is classified into a method using a DC voltage or a high frequency voltage and a magnetron method according to the plasma discharge method. The DC voltage sputtering deposition method is mainly used when depositing a target of metal, and the high frequency voltage sputtering deposition method is mainly used when depositing the target of an oxide or an insulator.

The magnetron sputtering deposition method is used in a similar concept to the method using DC voltage or high frequency voltage, but in order to form a magnetic field near the target surface, a permanent magnet or an electromagnet is installed around the target surface, so that electrons emitted from the cathode to the anode are near the cathode surface. Is deposited on the cathode surface by colliding the collected electrons with argon gas to impinge the argon cation (Ar +) onto the target of the cathode surface, which is relatively high in deposition rate and allows a large area of deposition. It is widely used because of the low temperature that is heated.

And sputtering coating apparatus is divided into in-line type and batch type according to the shape. In-line type is for the purpose of mass continuous production and is mainly used for two-dimensional coating. Its representative field is the LCD sputtering process which is coated on a flat surface. In the case of the batch type, the two-dimensional coating was possible by limiting and rotating the jig in the chamber, and only three-dimensional coating was possible.

Therefore, the existing PVD coating device is difficult to apply to the three-dimensional coating that has the mass productivity required in the recent mobile phone exterior, especially in the case of batch type device can improve the coating uniformity on the left and right sides through the revolution and rotation. There was a problem that the coating does not achieve uniformity when coating the upper and lower sides of the coated object. In particular, the uniformity of the film is very important in the interference color coating in which the color of the coated object is different depending on the viewing angle, but there is a problem that the conventional PVD device is almost impossible to apply the coated object having a three-dimensional shape.

1 is a perspective view of a vertical PVD device according to the prior art, FIG. 2 is a plan view of a vertical PVD device according to the prior art, and FIG. 3 is a front sectional view of the vertical PVD device according to the prior art, respectively.

As shown in the figure, the vertical PVD device 1 includes a trolley 3 at the bottom surface of the cylindrical chamber 2 and a jig for positioning the coated object on the top of the trolley 3. (4) is provided, and the coated objects rotate due to the rotation of the rotating cart 3 and at the same time due to the rotation of the jig (4).

In addition, a plurality of magnetron sputters or cathodic arcs 5 are provided at the edge of the circular chamber 2 to coat a coating material such as aluminum or titanium on the target surface and spray the coated material to coat the metal component on the coated object. Let's go. Since the cathodic arc is described in Korean Patent No. 10-0710525 (name of the invention: the ignition device of the electronic cathodic arc), the detailed description thereof will be omitted.

When coating in the above manner, there is a problem in the connection of the before and after processes, such as the loading, preheating and unloading process of the conventional in-line type device by using the rotary bogie 3 instead of the square bogie. It is because using a square bogie rather than the circular rotary bogie 3 in a normal process is convenient for connection of work | work.

In addition, the jig 4 should be positioned only at the edge portion of the rotary bogie 3, and, if the jig 4 is installed at the inner portion of the rotary bogie 3, the coated object placed on the jig 4 of the inner portion. There was a problem that the coating is not interfered properly by the coating to be placed on the edge of the coating. In addition, since the number of the coating targets can be relatively reduced with respect to the volume of the chamber 2, the yield has decreased because the coating targets should be positioned only at the circular edges.

In addition, when coating is required on the upper or lower side as well as the side of the object to be coated, such as the exterior of a mobile phone or a notebook, such a vertical PVD device has a problem in that the coating is not uniform on the upper or lower surface.

In order to solve the above problems, the present invention, it is possible to use a square bogie having a front and rear linkage of the work instead of the rotary bogie, the coating is possible only if the jig is placed only on the circular edge portion of the rotary bogie, In the blind bogie, each coated object can be placed on a jig formed in two rows, and its purpose is to provide a device having excellent work efficiency.

And a vapor deposition apparatus such as a magnetron sputter or a capacitive arc, which consists of a pair of ones movable up and down and forming an angle of 90 ° to 170 ° on both sides of the chamber, and a jig capable of rotating only is placed on top of the square bogie. It is arranged so that an even coating film is formed on the left and right side parts of the coated object by rotation, and an even coating film is formed on the upper and lower parts of the coated object by vertical movement of the deposition apparatus, regardless of the external shape of the coated object. It is also an object to provide an apparatus capable of forming a coating film.

As one aspect for achieving the above object, the present invention provides a cylindrical or hexahedral chamber for providing an internal space; A rectangular bogie having a rectangular parallelepiped fixed to a bottom surface of the chamber; A plurality of jigs coupled by the connecting portions of the upper surface of the blind bogie and capable of fixing the coated object configured to rotate due to rotation of the connecting portions; And a deposition apparatus provided on both side portions of the chamber and movable up and down. It is possible to be configured to include.

In addition, the deposition apparatus is formed by separating the upper and lower two, and the target surface of the upper deposition apparatus of the separated deposition apparatus is formed to face downwards and the target surface of the lower deposition apparatus is formed to face upwards, It is provided so as to form an angle between the upper deposition device and the lower deposition device may be made to 90 ° to 170 °.

And the vertical movement of the deposition apparatus is provided with a trajectory in which the deposition apparatus can move up and down in the chamber side wall portion where the deposition apparatus is located, provided to move up and down by driving the motor or the deposition apparatus is located The chamber side wall may include a cylinder in which the deposition apparatus may move up and down, and the deposition apparatus may be provided to move up and down according to the vertical movement of the cylinder. The vapor deposition apparatus here can be a magnetron sputter or a cathodic arc.

And the jig is provided in two rows in the same direction as the installation direction of the deposition apparatus, a heater is further provided between the jig and the jig to improve the deposition power by heating the coated object or between the jig and the jig is coated It is also possible to be configured to further have a polycol that can remove the gas generated in the water.

According to the present invention, it is possible to utilize for the deposition of a sample of a three-dimensional shape that requires an even coating on the object to be coated, such as when the effect of the interference color.

In addition, by placing the heater between the jig and the jig can also contribute to the improved deposition due to the heating of the coated object. And it is possible to be configured to place the poly cold between the jig and the jig to contribute to the improvement of the degree of vacuum.

In addition, it is easy to switch to in-line equipment in other operations related to before and after the coating operation in the chamber in a square bogie rather than a circular bogie.

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

4 is a perspective view of a three-dimensional coating apparatus using a physical deposition technique according to an embodiment of the present invention, Figure 5 is a plan view of a three-dimensional coating apparatus using a physical deposition technique according to an embodiment of the present invention, Figure 6 shows a front cross-sectional view of the apparatus for three-dimensional coating using a physical vapor deposition technique according to an embodiment of the present invention.

As shown in the figure, the three-dimensional coating apparatus 10 using the physical vapor deposition technique is provided with a hexahedral chamber 20, and the inside of the chamber 20 to support the rectangular bogie 30 and the coated object. Jig 40 is provided. In addition, a deposition apparatus 50 capable of coating the object to be coated is provided. As the deposition apparatus 50, a magnetron sputter 51 or a cathodic arc 52 may be used.

As shown in FIG. 1, the chamber 20 may not only be provided in the form of a cylinder, but also may be provided in the form of a hexahedron. In Figure 1, in order to achieve a coating at a suitable distance to the coating to be rotated by the rotating bogie, the form of the cylinder is preferable, as shown in Figure 4, the shape of the chamber 20 is not only the shape of the cylinder but also the shape of a rectangular parallelepiped. Furnace may also be provided.

In order to provide the internal state of the chamber 20 in a vacuum state, a vacuum pump (not shown) is usually provided.

The bottom surface of the chamber 20 is provided with a rectangular cart 30 having a rectangular parallelepiped having a relatively low height and a long rectangular shape. The blind cart 30 is preferably provided in a fixed form rather than rotating as shown in FIG. The blind cart 30 is provided with a jig 40 having a plurality of rows to position the object to be coated.

The jig 40 is preferably provided with two rows long in the same direction as the deposition apparatus 50, the magnetron sputter 51 or the cathode arc 52 is provided on both side portions of the chamber 20. 4 and the like, but the shape of the jig 40 is shown in the form of a long cylinder, but not necessarily in the form of a cylinder is provided in various forms according to the shape and size of the coated object, such as the form provided with a side pillar on the pillar. It is possible.

Therefore, if one coated object is not only located on one jig 40 but an even coating film can be formed, a plurality of coated objects can be placed on one jig 40 to improve efficiency.

Since the jig 40 should be provided to rotate at a constant speed from left to right or right to left at the top of the bogie, the jig 40 is not provided to be fixed to the bogie 30 but rotated by a motor (not shown) through a gear. It should be provided to be able to rotate in a driving manner. Therefore, it should be able to rotate by a motor (not shown) provided inside or outside the chamber 20. In a preferred embodiment, it is possible to rotate the connecting portion 41 connecting the square bogie 30 and the jig 40 by the driving of the motor, and the jig 40 is rotated by the connecting portion 41.

The jig 40 is to be coated to be coated by the present invention to be coated with the object having a three-dimensional shape that requires a uniform coating, such as the exterior of the notebook, the exterior of the mobile phone, tools, ornaments, etc. Can be used.

The side portion of the chamber 20 is formed horizontally long, it is possible to have a deposition apparatus 50 composed of two pairs. The deposition apparatus 50 may be provided with a magnetron sputter 51 or a cathodic arc 52.

In particular, a target material to be deposited is provided on the target surface 53, which is the front surface of the magnetron sputter 51, and aluminum, titanium, zirconium, tungsten silicon, or an alloy thereof may be used. The rear side of the magnetron sputter 51 is provided with a permanent magnet or an electromagnet 54 to apply a magnetic field to form a high density plasma around the magnetron sputter 51 to sputter process.

The deposition apparatus 50 is formed on one side, and is formed in two pairs of upper and lower deposition apparatuses 55 and 56. It may be provided in a slightly separated form and at the same time not formed in a straight line, but may be formed to have a constant angle. Preferably, the angle formed between the target surfaces 53 of the two deposition apparatuses 55 and 56 is 90 ° to 170 °. Do.

If the angle is too large, it is not suitable for coating the upper and lower portions of the coated object, and if the angle is too small, spraying the coated object from the paired deposition apparatuses 55 and 56 when coating the coated object. This is because there is a risk of overlapping injection and interference with the coated object.

The deposition apparatus 50 should be provided in a form that can be moved up and down according to the shape of the coated object attached to the jig 40, which has a vertical trajectory on the side wall in the chamber 20 in which the deposition apparatus 50 is provided. In addition, a method of moving up and down by a motor driving method along the track or having a cylinder on the side wall in the chamber 20 is provided so that the deposition apparatus 50 can be moved up and down by vertical movement of the cylinder. It is possible.

The heater 60 may be additionally provided between the jig 40 and the jig 40. The heater 60 serves to improve the deposition power by heating the coated object. The heater 60 is provided to be fixed to the trolley and is applied to improve the adhesion of the coating material to the coated object by heat generation by applying power to the coated material, which is usually used when the coated material is a metal material. .

The surface of the heater 60 is made of stainless and may be provided with tungsten filament filled with magnesium oxide therein.

Since the heater 60 is located between the jig 40 and the jig 40 among the chambers 20, the effect of improving the deposition power of the coating material on the coated object is improved, but the chamber 20 is heated by radiant heat. Since the effect of the small chamber 20 has the advantage of reducing the burden of cooling.

It is also possible to have a polycold 70 between the jig 40 and the jig 40. The polycold 70 is provided to improve the degree of vacuum in the chamber 20. The polycol 70 is cooled in the refrigerant below 50 ° C. or lower and flows through a tube installed in the chamber 20. It is a device that can obtain higher vacuum by freezing and attaching to the tube surface.

Particularly, when the coating material is made of plastic, it contains moisture in the plastic material. Therefore, a large amount of gas is generated in the plastic during coating. Therefore, the gas is removed and the vacuum is continuously maintained. have.

When the polycold 70 is positioned between the jig 40 and the jig 40, when the coating object is plastic, the gas generated at the time of coating can be removed at the same time to effectively remove the gas from the center. It will work.

In addition, since the heater 60 and the polycold 70 are positioned between the jig, there is an effect that does not interfere with the coating.

Figures 7a and 7b is a comparative view when coating on the coated material bonded to the jig 40, Figure 7a shows a coating method for the coated material according to the prior art, Figure 7b in one embodiment of the present invention Each coating method for the coated object according to the present invention is shown.

As shown in FIG. 7A, when coating the coated object 80 having a three-dimensional solid shape, there is a problem in that the upper surface of the drawing is not properly coated.

However, as shown in FIG. 7B, when the deposition apparatus 50 such as the magnetron sputter 51 or the cathodic arc 52 moves up and down and has a constant angle, the coated object 80 has a three-dimensional structure. Even if it has a shape, the coating of the side surface and the uniform thickness can be made by adjusting the speed of the magnetron sputter 51 and the like, even when the upper surface or the lower surface is coated. The α angle at this time is preferably provided with 5 ° to 45 °.

In addition, it is reasonable to maintain a constant ratio of the moving speed of the deposition apparatus 50 to the rotating speed of the jig 40 for uniform coating of the coated object, and it will vary depending on the property of the coated material and the required film thickness. The rotational speed of the jig 40 relative to the vertical movement speed of the 50 is preferably 5 to 100mm / jig rotation period.

What has been described above is only one embodiment of the apparatus for three-dimensional coating using the physical vapor deposition technique according to the present invention, the present invention is not limited to the above-described embodiment, as claimed in the following claims Without departing from the gist of the present invention, any person having ordinary knowledge in the field of the present invention will have the technical idea of the present invention to the extent that various modifications can be made.

1 is a perspective view of a vertical PVD device according to the prior art.

2 is a plan view of a vertical PVD device according to the prior art.

3 is a front sectional view of a vertical PVD device according to the prior art.

4 is a perspective view of an apparatus for three-dimensional coating using a physical vapor deposition technique according to an embodiment of the present invention.

5 is a plan view of a three-dimensional coating apparatus using a physical vapor deposition technique according to an embodiment of the present invention.

6 is a front sectional view of an apparatus for three-dimensional coating using a physical vapor deposition technique according to an embodiment of the present invention.

Figure 7a is a schematic diagram showing a coating method for the coating object according to the prior art.

Figure 7b is a schematic diagram showing a coating method for the coated material according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

20: chamber 30: blind bogie

40: jig 50: vapor deposition apparatus

60: heater 70: poly cold

Claims (12)

A chamber 20 providing an inner space; A rectangular bogie 30 having a rectangular parallelepiped fixed to the bottom surface of the chamber; Coupled by the connection portion 41 of the upper surface of the square bogie and configured to rotate due to the rotation of the connection portion 41 by the drive of the motor provided in the chamber 20 and a plurality of fixed to the coating object Jig 40; And Deposition apparatuses provided on both side portions of the chamber and movable up and down; Apparatus for three-dimensional coating using a physical vapor deposition technique comprising a. The method of claim 1, The chamber (20) is a three-dimensional coating device using a physical vapor deposition technique, characterized in that any one of a cylindrical or hexahedral. The method of claim 1, The deposition apparatus 50 is formed in two upper and lower surfaces, and the target surface of the upper deposition apparatus 55 of the separated deposition apparatus is formed to face downward and the target surface of the lower deposition apparatus 56 is directed upward. 3D coating apparatus using a physical vapor deposition technique, characterized in that it is formed to face to form a predetermined angle. The method of claim 3, wherein The upper deposition device 55 and the lower deposition device 56 is an angle formed by the three-dimensional coating device using a physical vapor deposition method, characterized in that 90 ° to 170 °. The method of claim 1, The vertical movement of the deposition apparatus 50 includes a track in which the deposition apparatus 50 can move up and down in the side wall portion of the chamber 20 where the deposition apparatus 50 is located, and the track image is driven by a motor. 3D coating apparatus using a physical vapor deposition technique characterized in that it moves up and down. The method of claim 1, The vertical movement of the deposition apparatus 50 includes a cylinder through which the deposition apparatus 50 can move up and down in the side wall of the chamber 20 where the deposition apparatus 50 is located, and the deposition apparatus is moved according to the vertical movement of the cylinder. 3D coating apparatus using a physical vapor deposition technique characterized in that it moves up and down. The method of claim 1, The deposition apparatus 50 is a three-dimensional coating device using a physical deposition technique, characterized in that the magnetron sputter (51). The method of claim 1, The deposition apparatus 50 is a three-dimensional coating device using a physical deposition technique, characterized in that the cathodic arc (52). The method of claim 1, The plurality of jig (40) is a three-dimensional coating apparatus using a physical vapor deposition technique, characterized in that provided in two rows in the same direction as the direction of the deposition apparatus (50). The method of claim 1, Between the jig (40) and the jig (40) is a device for three-dimensional coating using a physical vapor deposition technique characterized in that the heater 60 is further provided to improve the deposition power by heating the coated object. The method of claim 1, Between the jig (40) and the jig (40) is a device for three-dimensional coating using a physical vapor deposition technique, characterized in that it is further provided with a poly-cold (70) capable of removing the gas generated from the coating. The method of claim 1, Shanghai copper movement rate of the deposition apparatus 50 relative to the rotation rate of the jig 40 is 5 to 100mm / jig rotation device using a physical deposition technique, characterized in that the rotation period.

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