JP3173341B2 - Surface treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment apparatus for performing a surface treatment on an object in a closed space.

[0002]

2. Description of the Related Art Surface treatment apparatuses for performing plasma cleaning, sputtering, and other surface treatments on an object such as a substrate in an enclosed space are used in a production line of electronic parts and an assembly line of electronic equipment. I have.

FIG. 16 shows a conventional surface treatment apparatus.
This will be described with reference to FIG. FIG. 16 is a perspective view of a conventional surface treatment apparatus.

In FIG. 16, reference numeral 1 denotes a closed space, and a main body for performing the above-described surface treatment in the closed space; 2, an entrance provided on the front surface of the main body 1; The gate. In order to open and close the entrance 2 at the gate 3, the upper end of the rod 5 of the cylinder 4 fixed to the main body 1 is connected to the gate 3.

More specifically, when the cylinder 4 is driven so that the rod 5 is projected, as shown in FIG.
To form a closed space in the main body 1,
When the rod 5 is immersed, the entrance 2 can be exposed to the outside. In addition, when the entrance 2 is closed by the gate 3,
The main body 1 is closed to the outside except for the entrance 2 so that a closed space is formed in the main body 1.

Reference numeral 6 denotes an object to be fed along a transport line indicated by an arrow L. When a surface treatment is to be performed on the object 6, the object 6 is temporarily placed in a supply unit T disposed in the transport line L. Is placed. Reference numeral 7 designates an object 6 before surface treatment placed on the supply unit T, which is put into the main body 1, or a surface-treated object 6 in the main body 1 which is supplied to the supply unit T, that is, the transport line L
It is a way to get back in and out.

Next, the operation of the conventional surface treatment apparatus will be described. First, the entrance 2 is closed by a gate 3 so that the inside of the main body 1 is set to an atmosphere for performing a surface treatment. next,
The target object 6 is sent in the direction of the transport line L and placed on the supply unit T.

Next, the access means 7 is driven to take out the object 6 from the supply section T. Then, the gate 3 is lowered to open the entrance 2, and the object 6 is put into the main body 1 by the entrance / exit means 7.

Next, the access means 7 is retracted from the main body 1, the gate 3 is raised, and the entrance 2 is closed. Thereby, the inside of the main body 1 becomes a closed space, and the target object 6 exists in the closed space.

Next, surface treatment of the object 6 is performed in the main body 1. After finishing the surface treatment, the gate 3
To open the doorway 2. Then, the retracted access means 7 is driven into the main body 1, and the surface-treated object 6 existing in the main body 1 is taken out from the main body 1.

Next, the gate 3 is raised to close the entrance 2, and the surface-treated object 6 is returned to the supply unit T by the entrance / exit means 7. Thereafter, the surface-treated object 6 is sent out by the transport line L.

[0012]

However, the conventional surface treatment apparatus has the following problems.

In a conventional surface treatment apparatus, the periphery of an electrode to which a high-frequency voltage is applied to generate plasma is completely surrounded by a wall surface, and it is difficult to release the heat of this electrode to the outside. Was cooled by a water cooling method.

In this case, there is a problem that a pumping device such as a pipe and a pump for circulating the water to be operated, a heat exchanger, and the like are indispensable, and the entire device becomes a large standard.

It is an object of the present invention to provide a compact surface treatment apparatus.

[0016]

According to a first aspect of the present invention, there is provided a surface treatment apparatus comprising a base and a part of a transport path for transporting an object.
Form, to guide the object guide and the lid downward to form a closed space in contact is opened, and the base, a first electrode is grounded is provided in the lid, the high-frequency voltage provided on the base There a second electrode applied to open the lower second electrode to the outside, provided with a cooling means for cooling at air cooling system of the second electrode from below. The surface treatment apparatus according to claim 2.
The surface treatment apparatus according to claim 1, wherein the cooling device
The step includes a cooling filter that is thermally coupled to a lower portion of the second electrode.
And a fan for blowing air to the cooling fins. Claim
Item 3 is the surface treatment apparatus according to Item 2.
A wire bonding portion adjacent to the lid.
And the fan is provided opposite to the wire bonding portion.
It is installed to blow air toward the other side.

[0017]

In the above structure, a high-frequency voltage is applied to the second electrode during the surface treatment, and the temperature of the second electrode rises. Here, in this means, the lower part of the second electrode is opened to the outside, and the second electrode is cooled from below by the air cooling method. Therefore, large components such as pipes, pressure pumps, and heat exchangers, which are indispensable in the conventional surface treatment apparatus, can be omitted, and the entire scale can be made compact.

[0018]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view of a surface treatment apparatus according to an embodiment of the present invention. The surface treatment apparatus according to the present embodiment has a large number of components, and there are many points that cannot be illustrated in detail, so that the outline is first described with reference to FIG. It shall be.

In FIG. 1, reference numeral 8 denotes a base having an upper surface formed substantially horizontally. An upright portion 8a that is taller than the upper surface of the base 8 is provided behind the base 8, and a monitor 8b is disposed in front of the upright portion 8a. Can understand the operation status of

On the upper surface of the base 8, a straight conveying path L is formed from the lower left to the upper right in FIG. Reference numeral 9 denotes a supply magazine which is disposed on the upstream side of the transport path L and stores the object 6 before surface treatment in multiple stages. Reference numeral 10 denotes a collection magazine which is disposed downstream of the transport path L and stores the surface-treated object 6.

Reference numeral 11 denotes an extruding cylinder for sending the object 6 before surface treatment from the supply magazine 9 to the transport path L.

Reference numeral 12 denotes a supply magazine 9 on the upper surface of the base 8.
And a base 13 which is inline-developed on the transport path L and constitutes a part of the transport path L. A base 13 is open at the bottom, and is a lid supported so as to be able to freely contact and separate from the base 12 from above. is there.

The structures of the base 12 and the lid 13 will be described in detail later.
, A closed space is formed on the transport path L. That is, the base 12 has a role as a member surrounding the closed space together with the lid 13 and a role as the transport path L.

Reference numeral 14 denotes a wire bonding portion disposed between the base 12 and the collection magazine 10 at a position slightly offset from the transport path L toward the back.

In the present embodiment, a substrate is adopted as the object 6, and the object 6 is subjected to plasma cleaning as an example of surface treatment in a closed space formed by the lid 13 and the base 12, so that the substrate 6 The deposits or the deposits present on the electrodes and the like are removed to facilitate the bonding of the electrodes and the like. Then, the adjacent wire bonding portion 14
Thus, bonding is performed on the object 6 immediately after the plasma cleaning, and the object 6 is stored in the collection magazine 10.

Reference numeral 15 denotes a transport path L whose leading end reaches the transport path L.
Is a second arm which is parallel to the first arm 15 and is located at a certain distance from the first arm 15 on the downstream side of the transport path L.

Reference numeral 17 denotes a cover formed on the front side of the upper surface of the base 8 so as to be long in parallel with the transport path L. And the cover 17
As will be described later in detail, the first arm 15 and the second arm 16 are kept parallel to each other with the above-mentioned fixed distance therebetween.
And an arm moving mechanism for moving the arm in parallel.

Reference numeral 18 denotes a pair of guides for guiding the object 6 along the transport path L between the upstream side of the wire bonding section 14 and the collection magazine 10 in the transport path L. Here, the first arm 15 and the second arm 16
Corresponds to a transport unit that transports the target object 6 along the transport path L. The arm moving mechanism and the transport operation of the object 6 will be described later in detail.

Next, a mechanism (contact / separation means) for raising / lowering the lid 13 and bringing the lid 13 into a horizontal / vertical state will be described with reference to FIGS.

Here, the posture of the lid 13 is defined.
First, when the lower end surface of the lid 13 is in a horizontal plane, the lid 13 is said to be in a horizontal state. On the other hand, when the lower end surface of the lid 13 is in the vertical plane, the lid 13 is said to be in the vertical state.

When the lower end surface of the lid 13 is in close contact with the base 12, the lid 13 is said to be in a lowered state.
3 is separated from the base 12 by the lid 13 and the base 12.
The lid 13 is said to be in the raised state when there is a gap between the cover 13 and the cover 13.

When the lid 13 is in the horizontal state and in the lowered state, this is referred to as a horizontal lowered state.
When two states are established at the same time, these states are expressed sequentially.

Now, the lid 13 is operated by the mechanism described below.
It is supported so that it can adopt three states of a horizontal descending state, a horizontal rising state, and a vertical rising state. In FIG.
Are in a horizontally lowered state, and in FIG. 3, the lid 13 is in a horizontally raised state.

In FIG. 2, reference numeral 20 denotes a frame having a horizontal portion 20a fixed to the upper surface of the base 8, and upright portions 20b and 20c vertically rising from both ends of the horizontal portion 20a.

The upright portions 20b and 20c of the frame 20
At the upper part, guides 21 and 22 each having an L-shaped cross section and having a tip facing outward are protruded.

Reference numeral 23 denotes a cylinder as a contact / separation means fixed to the center of the horizontal portion 20a such that the rod 23a faces upward. The upper end of the rod 23a is connected to the center of the horizontal portion 24a of the U-shaped arm 24 having a U-shape.

The above-described guides 21 and 22 are slidably engaged with the upright portions 24b and 24c, respectively, which stand upward from both ends of the horizontal portion 24a of the U-shaped arm 24, respectively. A shaft 26 is mounted on the upper ends of the standing portions 24b and 24c, and a bracket 25 is pivotally supported by the shaft 26 so that the bracket 26 can rotate in a vertical plane.

Here, as shown in an enlarged manner in FIG. 4, the bracket 25 has a substantially Z-shape bent at right angles at two places. Of the bracket 25, 25a is a first piece, 25b
Is a second piece having the same length as the first piece 25a and being bent 90 degrees with respect to the first piece 25a. The intersection of the center lines of the first piece 25a and the second piece 25b coincides with the axis of the shaft 26.

Also, 25c is formed to be longer than the second piece 25b, and the first piece 25a and the second piece 2
The third piece is bent 90 degrees in the opposite direction to the relationship with 5b.

A first pin hole 27 and a second pin hole 28 are formed in the first piece 25a and the second piece 25b at positions equidistant from the axis of the shaft 26, respectively, in the thickness direction. Have been.

As shown in FIG. 4, when the third piece 25c faces in the horizontal direction, the upright portions 24b, 2
4c, a second pin hole 28 formed in the second piece 25b.
An insertion hole 24d is formed at a position that coincides with.

Accordingly, as shown in FIG. 4, when the third piece 25c of the bracket 25 is oriented in the horizontal direction, the second pin hole 28 and the insertion hole 24d are aligned, and the pin 30 is inserted through them. The rotation of the bracket 25 can be prohibited at the position where the three pieces 25c face in the horizontal direction.

Since the shaft 29 for supporting the side surface 13a of the lid 13 so as to be swingable in the direction of arrow N2 is attached to the tip end of the third piece 25c of the bracket 25, as described above. By prohibiting the rotation of the cover 13, the lid 13 can be held in a horizontal state.

On the other hand, as shown in FIG. 5, when the third piece 25c is oriented vertically, the first pin hole 27 formed in the first piece 25a coincides with the insertion hole 24d.

At this time, the first pin hole 27 and the insertion hole 24d
Then, by inserting the pin 30, the third piece 25c can be kept upright in the vertical direction. Further, as described above, since the side surface 13a of the lid 13 is swingably supported by the bracket 25 by the shaft 29, the lid 13 can be set in the vertical state.

Here, when the lid 13 is in the vertical state, the lid 1
The inside of 3 is exposed to the outside. Therefore, replacement or cleaning of the member attached inside the lid 13 can be easily performed. Further, since the space above the base 12 is widened when the lid 13 stands, similar maintenance can be performed on the base 12 and members attached to the base 12.

As described above, in the surface treatment apparatus of this embodiment,
With the lid 13 in a vertical state, a space between the lid 13 and the base 12 (this space is also a part of the transport path L) is widely opened so that maintenance can be performed very easily.

Next, the operation of shifting the lid 13 from the horizontal lowering state to the horizontal raising state will be described with reference to FIGS.

As shown in FIG. 2, when the lid 13 is in the horizontal lowered state, the rod 23a is retracted, and the pin 30 is inserted through the second pin hole 28 and the insertion hole 24d.
Are kept horizontal. The lower end surface of the lid 13 is in close contact with the base 12.

As will be described later, the lid 13 is in a horizontally lowered state, a closed space is formed by the lid 13 and the base 12, and when surface treatment is performed in this closed space,
Since the pressure in the closed space is lower than the atmospheric pressure, the lid 13 is sufficiently adhered to the base 12 even if the lid 13 is not pressed against the base 12 by the operating force of the cylinder 23.

Next, in order to raise the lid 13 horizontally,
The cylinder 23 is driven to project the rod 23a. Then, the U-shaped arm 24 rises vertically while being guided by the guides 21 and 22, and accordingly, the bracket 25 rises while maintaining the state where the third piece 25c faces in the horizontal direction. As a result, the lid 13 is lifted away from the base 12 while keeping the horizontal state.

Thus, as shown in FIG. 3, a gap is formed between the lid 13 and the base 12, and the first arm 15 and the second arm 16 for pushing the object 6 can pass through the gap. (Arrow N1).

Next, the structure of the lid 13 will be described in detail with reference to FIGS. FIG. 6 is an exploded perspective view of the lid according to the embodiment of the present invention as viewed from below.

As shown in FIG. 6, the lid 13 has a shape whose lower side is open. Among them, 13b is a substantially rectangular lid body. The lid body 13b is capable of completely storing the object 6 therein, a processing chamber 13c for performing plasma cleaning as a surface treatment on the object 6, and a processing chamber 13c smaller than the processing chamber 13c and continuous to the side of the processing chamber 13c. Exhaust chamber 13d
Is provided.

Reference numeral 13e denotes a window for observing the inside of the processing chamber 13c from the outside, and 13f denotes four screw holes provided in the processing chamber 13c.

An inner cover 31 is attached to a wall surrounding the processing chamber 13c and the exhaust chamber 13d. Of the inner cover 31, the processing chamber 13c and the exhaust chamber 13
Many fine irregularities are formed on the surface S facing the inside of d, and the surface S is devised so as to increase the substantial surface area.

This is because, when the object 6 is subjected to plasma cleaning in the processing chamber 13c, the scraped-out minute substance is scattered. This is for preventing the minute substance scraped off from the object from re-adhering to the object 6.

Reference numeral 32 denotes a first electrode for generating plasma. The first electrode 32 has a screw hole 3 as shown in FIG.
2a and the screw hole 13f are fixed to the processing chamber 13c by being screwed with the set screw 33. The first electrode 3
2 is electrically grounded.

Next, referring to FIG. 8 and FIG.
2 and its related members will be described. FIG. 8 is an exploded perspective view of a base according to an embodiment of the present invention.

As shown in FIG. 8, the base 12 is composed of a thick plate slightly larger than the lid 13 shown in FIG. A rectangular opening 12a is opened in the center of the base 12 to insert the second electrode 34 to which a high-frequency voltage is applied by the cable 35.

The portion of the base 12 facing the processing chamber 13c of the lid 13 is a processing area A for performing plasma cleaning on the object 6, and is adjacent to the processing area A and faces the exhaust chamber 13d. The portion is an exhaust area B.

Here, a groove 12e is formed in a portion of the base 12 which is in contact with the lower end surface of the lid 13, and this groove 12e is formed.
An O-ring 39 as a close contact portion is fitted in the central portion of the.

The upper end of the O-ring 39 is located slightly below the upper surface of the base 12, as shown in FIG.

As shown by the arrow N2 in FIG. 9, when the object 6 crosses the base 12, the object 6, the first arm 15, and the second arm 16 do not touch the O-ring 39,
This is to make it possible to move smoothly. When the object 6 crosses the base 12 in this manner, the object 6, the first arm 15, and the second arm 16
By avoiding contact with 9, damage to the O-ring 39 can be avoided, the airtightness in the sealed space 60 can be kept high, and the degree of vacuum can be prevented from lowering.

In FIG. 8, reference numeral 12b denotes a gas opened at the corner of the processing area A for supplying an operating gas supplied from a gas cylinder described later into the processing area A (ie, the processing chamber 13c). It is a supply port.

Further, in the processing area A of the base 12, a plurality of screw holes 12c are formed in a direction orthogonal to the transport path L. Then, of these screw holes 12c, one that matches the width of the object 6 is selected, and the selected screw hole 12c is selected.
The guides 40 and 41, which form a part of the transport path L and guide the object 6, are fixed with set screws 42. Object 6 of course
Is changed, the position of the selected screw hole 12c can be changed. These guides 40 and 41 are made of an insulator.

On the other hand, in the center of the exhaust area B of the base 12, after the surface treatment is completed, argon gas or the like is exhausted to the outside, or the atmosphere in the processing chamber 13c and the exhaust chamber 13d is exhausted to the outside. For this purpose, an inlet 12d is opened. The suction opening 12d is covered with an electrically grounded wire mesh 38. When particles charged during plasma generation attempt to pass through the suction opening 12d, the wire mesh 3 is closed.
At 8, the charge is removed.

On the other hand, the lower part of the second electrode 34 is open to the outside, and the lower part of the second electrode 34 is
Cooling fins 36 are thermally coupled to radiate the heat generated during operation 4 to the outside. This way,
The lower part of the second electrode 34 is opened to the outside, and cooling by the air cooling method using the cooling fins 36 and the like becomes possible, so that compact and efficient cooling can be performed.

The second electrode 34 is provided with a flange portion 34a at a position stepped down. An insulating plate 37 having the same shape as the flange 34a is interposed between the flange 34a and the lower surface of the base 12,
The base 12 and the flange portion 34a are fixed by bolts 43. Here, the base 1 is formed by the insulating plate 37.
2 and the second electrode 34 are not short-circuited.

FIG. 10 is a sectional view of a surface treatment apparatus according to one embodiment of the present invention. FIG. 10 shows a state in which the lid 13 is in the horizontal ascending state, there is a gap between the lid 13 and the base 12, and the object 6 is pushed by the first arm 15.

Next, with reference to FIG.
The mechanism for moving the fifth and second arms 16 will be described.

A linear guide 44 parallel to the transport path L is provided inside the cover 17 shown in FIG. A slider 45 fixed to a moving frame 46 is slidably engaged with the linear guide 44, so that the moving frame 46 can freely move in a direction parallel to the transport path L (perpendicular to the paper surface). .

Further, the lower part of the moving frame 46 is
Is fixed to the timing belt 49 which is adjusted in parallel with
The driving force of the motor 47 is transmitted to the timing belt 49 via the pulley 48.

Further, a shaft 50 is provided above the moving frame 46.
The shaft 50 is pivotally supported at the base end of the first arm 15 whose distal end is bent downward in a key shape. The rod 52 of the cylinder 51 fixed to the moving frame 46 is connected to the base of the first arm 15.

Therefore, when the motor 47 is driven, the first arm 15 can be reciprocated in parallel with the transport path L. When the cylinder 51 is driven to push and retract the rod 52, the first arm 15 is moved in a chain line. The first arm 15 can be detached from the object 6 as shown in the drawing, or the first arm 15 can be brought into contact with the end of the object 6 as shown by the solid line.

When the first arm 15 is brought into contact with the object 6 and the motor 47 is driven, the object 6 can be pushed along the transport path L. The second arm 16 also has the same movement mechanism as the first arm 15.
Here, in the present embodiment, the first arm 15 and the second arm 16
Are connected to the same timing belt 49 at a fixed distance, but the first arm 15 and the second arm 16 may be independently moved in parallel with the transport path L by separate moving means.

Next, the means for cooling the second electrode 34 will be described. In FIG. 10, a fan 53 blows air to the cooling fins 36. In the present embodiment, the wind sent from the fan 53 is directed to the opposite side of the wire bonding unit 14. This is to prevent the blowing from affecting the wire bonding portion 14. In this way, the lower part of the second electrode 34 is released to the outside, and the second
Since the electrodes 34 are cooled, there is no need to provide large components such as pipes for circulating cooling water, a pressure pump, a heat exchanger, etc. unlike the conventional surface treatment apparatus, and the entire surface treatment apparatus is compact. Can be formed.

When the lid 13 is lowered horizontally, as shown in FIG. 11, the lower end face of the lid 13
A closed space 60 formed by the processing chamber 13c and the exhaust chamber 13d is formed in close contact with the ring 39. In the processing chamber 13c, the grounded first electrode 32 and the second electrode 34 to which the high-frequency voltage is applied face each other, and the object 6 supported by the guides 40 and 41 is located between the electrodes 32 and 34. Will do. Further, the exhaust chamber 13d communicates with the suction port 12d via the wire mesh 38.

Next, with reference to FIG. 12, the electrodes and their accompanying structures in the surface treatment apparatus of this embodiment will be described. Now, as already described with reference to FIGS.
In the surface treatment apparatus of the present embodiment, the first electrode 32 grounded on the lid 13 is provided, and the base 12 facing the first electrode 32 is provided with:
A second electrode 34 to which a high-frequency voltage is applied is provided.

Then, as shown in FIG. 12, a high frequency applying section 61 is connected to the second electrode 34 via a cable 35. The high-frequency applying unit 61 includes a high-frequency power supply 62 that generates a high-frequency voltage, and a tuner 63 that adjusts the high-frequency voltage generated by the high-frequency power supply 62 and outputs the adjusted high-frequency voltage to the cable 35, that is, the second electrode 34.

Therefore, the object 6 is placed between the lid 13 and the base 12.
, And the lid 13 is set to the horizontal lowering state, and the first electrode 3
By locating the second and second electrodes 34 at a predetermined distance and operating the high frequency application unit 61, an electrical environment for generating plasma in the closed space 60 can be created.

Then, when the high frequency applying unit 61 is operated,
Since the second electrode 34 generates heat, the fan 53 that cools the cooling fins 36 to which the second electrode 34 is thermally coupled is also operated to prevent the temperature of the second electrode 34 from excessively increasing.

Next, referring to FIGS. 12 and 13, a gas supply section 64 for supplying argon gas into the closed space 60 through a gas supply port 12b opened in the base 12, and an exhaust area B of the base 12 will be described. The pressure adjusting unit 68 that measures and controls the pressure in the closed space 60 via the suction port 12d opened in the first embodiment will be described.

First, in the gas supply section 64, 65 is a gas cylinder for storing argon gas as an operating gas, 66 is a gas control section for controlling the flow rate and pressure of the discharged argon gas, and 67 is a gas control section 66 and a gas control section. It is a discharge pipe connecting the supply port 12b.

Therefore, when the gas supply unit 64 is operated, the argon gas whose flow rate or the like is controlled can be sent into the processing chamber 13c through the gas supply port 12b. In addition, since the gas supply port 12b is located at a position away from the suction port 12d in the processing area A, and the suction port 12d is provided in the exhaust area B deviating from the processing area A,
If the argon gas does not pass through the processing area A, it cannot reach the suction port 12d, and the argon gas can be sufficiently distributed to the processing area A, thereby suppressing the variation in the concentration of the argon gas.

As will be described later, the argon gas is not exhausted to the suction port 12d as it is,
When the argon gas is supplied to the processing area A, the inside of the sealed space 60 is in a reduced pressure state close to a vacuum, and a high-frequency voltage is applied to the second electrode 34. The object 6 is subjected to etching (plasma cleaning). In this embodiment, an argon gas is used to generate plasma, but another gas may be used.

Next, the pressure adjusting section 68 will be described. The pressure adjusting unit 68 includes the following four systems.

The first system is a vacuum system. That is, the discharge port of the above-described vacuum pump 19 is connected to the suction port 12 d via the vacuum pipe 69. 70 is a vacuum pipe 6
9 is a vacuum valve interposed in the middle of FIG. Therefore, when the vacuum pump 19 is operated and the vacuum system valve 70 is opened, the inside of the closed space 60 can be depressurized to a substantially vacuum state.

The second system is an open air system. That is,
An atmosphere opening pipe 71 is connected to the suction port 12d, and the atmosphere opening pipe 71 reaches an atmosphere opening port 73 via an atmosphere opening valve 72. Therefore, after the inside of the sealed space 60 is evacuated using the above-described vacuum system, the air release valve 7 is opened.
When the air outlet 2 is opened, the atmosphere can be introduced into the sealed space 60 from the atmosphere opening port 73 via the atmosphere opening pipe 71, and the pressure inside the sealed space 60 can be restored to the atmospheric pressure.

The third system is a system of the pressure switch 74. The pressure switch 74 is for detecting whether or not the inside of the closed space 60 has returned to the atmospheric pressure when returning the inside of the closed space 60 to the atmospheric pressure using the open-to-atmosphere system. The fourth system is a system of the vacuum gauge 75. The vacuum gauge 75 is for measuring the vacuum pressure in the closed space 60 when the pressure in the closed space 60 is reduced using a vacuum system. Note that the pressure switch 74 may be omitted.

FIG. 13 is a sectional view taken along the line XX of FIG.
As shown in the figure, the four systems described above
6, a first port 76a opening downward, a second port 7
6b, a third port 76c, and a fourth port 76d. In addition, these ports 76a to 76d
Are connected to a common port 76e that opens upward inside the connection unit 76, and the common port 76e is directly connected to the suction port 12d of the base 12.

Next, the lid 13 is in a horizontally raised state,
The operation from when the target object 6 is sent between the base 3 and the base 12 to when the plasma cleaning of the target object 6 is completed will be described.

First, when the target object 6 is sent between the lid 13 and the base 12, the target object 6 is supported on the transport path L by guides 40 and 41 constituting a part of the transport path L. Further, since the lid 13 is in the raised state, the surroundings of the object 6 are at atmospheric pressure.

Next, as shown in FIG.
3 is driven to bring the lower end surface of the lid 13 into contact with the O-ring 39, and a closed space 60 is formed by the lid 13 and the base 12. Next, the vacuum pump 19 is driven to operate the vacuum system valve 70.
Is opened, and the pressure in the closed space 60 is reduced. At this time, the vacuum pressure in the closed space 60 is monitored by the vacuum gauge 75.

When the pressure in the closed space 60 is sufficiently reduced,
The gas supply unit 64 is operated to supply argon gas into the processing chamber 13c of the closed space 60 via the gas supply port 12b. Then, the high-frequency application unit 61 is operated, and the second electrode 3 is activated.
A high frequency voltage is applied to 4 to generate plasma in the processing chamber 13c. Then, the object 6 is cleaned by the charged particles in the plasma.

At this time, charged particles may scatter to the suction port 12d side. However, the grounded wire mesh 38 is attached to the suction port 12d.
When it adheres, the charge is removed, and the charged particles do not reach a vacuum system or the like. Then, this state is maintained for a predetermined time. This time is for sufficient cleaning,
This is a preset time.

When the predetermined time has elapsed, the application of the high frequency is stopped, and the supply of the argon gas by the gas supply unit 64 is stopped. Further, the vacuum system valve 70 is closed. Then, the atmosphere release valve 72 is opened, and the atmosphere is introduced into the closed space 60 from the atmosphere release port 73. Then, the sealed space 60
At this time, the pressure in the sealed space 60 is monitored by the pressure switch 74 to determine whether the pressure in the closed space 60 has returned to the atmospheric pressure.

When the pressure in the closed space 60 returns to the atmospheric pressure, the air release valve 72 is closed, the cylinder 23 is driven, and the lid 13 is raised horizontally. Then, the target object 6 having been subjected to the surface treatment is retracted from between the lid 13 and the base 12, and the target object 6 before the surface treatment is entered between the lid 13 and the base 12.

Next, with reference to FIGS. 14 and 15, the operation of transporting the object 6 in the surface treatment apparatus of this embodiment will be described. FIG. 14 is a plan view showing a transport path in one embodiment of the present invention.

As described above, the transfer of the object 6 is mainly performed by the first arm 15 and the second arm 15 as the transfer means.
This is performed using the arm 16. The first arm 15 and the second arm 16 are both fixed to a single timing belt 49 at a fixed interval t, and the transport path L
The first arm 15 and the second arm 16 move integrally with respect to the direction parallel to.

On the other hand, the first arm 15 and the second arm 16 are independently provided with a cylinder 51 for vertically moving the arm as shown in FIG.
5, the second arm 16 can be independently moved up and down.

In the following description, the first object 6X has already been subjected to the surface treatment and has been subjected to the wire bonding by the wire bonding section 14 in order from the downstream side of the transport path L, and the second object 6Y has been hermetically sealed. It is assumed that the above-described surface treatment has been performed in the space 60, and the third target object 6Z has been stored in the supply magazine 9 before the surface treatment.

Now, in the positional relationship of FIG. 14, wire bonding to the first object 6X and the second object 6Y
Is completed, the lid 13 is brought into a horizontally raised state.

Then, as shown in FIG.
The arm 16 is used as the first object 6X, and the first arm 15 is used as the second object.
The first object 6X is pushed into the collection magazine 10 and the second object 6Y is pushed forward of the wire bonding unit 14 by driving the motor 47 (arrow M1). At the same time, the extrusion cylinder 11 is driven to push out the third object 6Z from the supply magazine 9 and to approach the gap between the lid 13 and the base 12.

Next, as shown in FIG. 15B, the first arm 15 and the second arm 16 are raised, the first arm 15 is moved forward of the third object 6Z, and the second arm 16 is moved to the second position. 2
Each is moved forward of the target object 6Y (arrow M
2). Then, as shown in FIG. 15C, the first arm 15 is brought into contact with the third object 6Z, the second arm 16 is brought into contact with the second object 6Y, and the first arm 15 and the second arm 16 The third object 6Z is pushed to the position of the second object 6Y in FIG. 14, and the second object 6Y is pushed to the position of the first object 6X in FIG. 14 (arrow M3).

Thereafter, the first arm 15 and the second arm 16
Is returned to the position shown in FIG. 14, and the lid 13 is lowered horizontally.
Then, the surface treatment on the third object 6Z and the wire bonding on the second object 6Y are performed in parallel. Hereinafter, by repeating the above-described operation, a step of performing wire bonding on the object immediately after the surface treatment is completed.

As described above, in the surface treatment apparatus of the present embodiment, the surface treatment apparatus can be developed in-line on the transport path L, and the surface-treated object 6 is retracted from the downstream side of the transport path L of the surface treatment apparatus. Almost at the same time, the object 6 before surface treatment is
Can enter the surface treatment device. As a result, the surface treatment and transport of the object can be performed with almost no loss time, and the productivity can be greatly improved.

[0109]

According to the surface treatment apparatus of the present invention, a base, a guide provided on the base for guiding an object, an opening at a lower side, and supported to be able to freely contact and separate from the base from above, In addition, a lid that forms a closed space when in contact with the base, a first electrode provided on the lid and grounded, and a second electrode provided on the base and to which a high-frequency voltage is applied are provided. Since the cooling means which opens to the outside and cools the second electrode from below with the air cooling method is provided, the second electrode can be sufficiently cooled by the small-scale cooling means, and the water cooling method has to be adopted. It can be formed more compactly than the surface treatment device.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a surface treatment apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of the contact / separation means according to the embodiment of the present invention.

FIG. 3 is a perspective view of a contact / separation unit according to an embodiment of the present invention.

FIG. 4 is a perspective view of a bracket according to an embodiment of the present invention.

FIG. 5 is a perspective view of a bracket according to an embodiment of the present invention.

FIG. 6 is an exploded perspective view of the lid according to the embodiment of the present invention as viewed from below.

FIG. 7 is a perspective view of the lid according to the embodiment of the present invention as viewed from below.

FIG. 8 is an exploded perspective view of a base according to an embodiment of the present invention.

FIG. 9 is a plan view of a base according to an embodiment of the present invention.

FIG. 10 is a sectional view of a surface treatment apparatus according to an embodiment of the present invention.

FIG. 11 is a sectional view of a surface treatment apparatus according to an embodiment of the present invention.

FIG. 12 is a perspective view of an auxiliary configuration of an electrode according to an embodiment of the present invention.

FIG. 13 is an end view taken along line XX of FIG. 2;

FIG. 14 is a plan view showing a transport path according to an embodiment of the present invention.

15A is a diagram illustrating a transfer operation according to an embodiment of the present invention. FIG. 15B is a diagram illustrating a transfer operation according to an embodiment of the present invention.

FIG. 16 is a perspective view of a conventional surface treatment apparatus.

[Explanation of symbols]

 6 Object 12 Base 13 Lid 23 Cylinder 32 First electrode 34 Second electrode 36 Cooling fin 40 Guide 41 Guide 60 Sealed space

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI // C23C 14/34 C23C 14/34 J H01L 21/3065 H01L 21/302 B (58) Field surveyed (Int.Cl. ⁷ H01L 21/02 C23F 4/00 H01L 21/203 H01L 21/68 H05H 1/46 C23C 14/34 H01L 21/3065

Claims (3)

(57) [Claims] 1. A base and a part of a transport path for transporting an object.
A guide that guides the object, a lid that is open at the bottom and that contacts the base to form a closed space, a first electrode provided on the lid and grounded, A second electrode to which a high-frequency voltage is applied, and a cooling means for opening the lower part of the second electrode to the outside and cooling the second electrode from below by an air cooling method. Processing equipment. 2. The surface treatment apparatus according to claim 1, wherein said cooling means includes a cooling fin thermally coupled to a lower portion of said second electrode, and a fan for blowing air to said cooling fin. 3. A wire bonding part is provided adjacent to the lid, and the fan is installed so as to blow air toward the opposite side of the wire bonding part. Surface treatment equipment.