JP2003298211A - Manufacturing method of wiring board and advancing apparatus for in-process wiring board in processing bath - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make works advance in a processing tank in the surface treatment for in-process wiring boards without the help of a hoist so that the number of hoists can be reduced in the process line; the control can be simplified; the waiting time of the hoists can be reduced; and the productivity can be improved. <P>SOLUTION: Along the upper edges on the both sides of the processing tank 1 in the longitudinal direction, screw shafts 11 are arranged so as to rotatably extend on each shaft line G in the longitudinal direction while being restricted to move in the direction of each shaft line. While suspending parts 31 are disposed so as to bridge both screw shafts 11, the suspending parts 31 are made possible to gear with the screw shafts when the suspending parts 31 are disposed. While the suspending parts 31 are disposed between both screw shafts 11, when being geared with the screw shafts, the suspending parts 31 are advanced by simultaneously rotating both screw shafts 11. Hence, since the suspended in-process boards can be advanced as the boards are immersed in a solution in the processing tank, the number of the hoists can be reduced. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a wiring board, and more particularly to a method for manufacturing a wiring board such as an IC package and a printed board.

[0002]

2. Description of the Related Art Conventionally, a wiring board (hereinafter, also simply referred to as a board) is manufactured by using, for example, a double-sided copper-clad board (core board) as a starting material and a semi-additive method using electroless plating and electrolytic plating. To be done. When forming a copper plating layer by electroless plating on such a wiring board (work-in-process) made of resin, for example, as a pretreatment, the surface of the board (resin surface) is increased to improve the adhesion of the plating layer. From these points, it is sent to various treatment (surface treatment) steps such as roughening, washing, and activation.

In such processing steps, for example,
A large number of processing tanks (hereinafter, also simply referred to as tanks) such as a roughening processing tank, a cleaning processing tank, and a plating processing tank are arranged in a row. The surface treatment of the wiring board work-in-progress (hereinafter also referred to as a resin wiring board, a wiring board or a substrate) is sequentially immersed in the treatment liquid, the cleaning liquid, etc. of these tanks for a predetermined time, and after each step, a predetermined process is performed. The surface treatment is completed.

Of the processing baths used in such a manufacturing process, for example, in the roughening treatment bath 101 shown in FIG. 8, three suspensions are provided in the substrate feeding direction (arrow A in the figure). Plural substrates (groups of works) are hung on each of the racks (also referred to as racks) 201 to 203, and immersed (immersed) in the liquid E for a predetermined time necessary for processing.
The hanging bodies 201 to 203 are all in the tank 101.
It is supported on the upper edges of both sides. On the other hand, since the roughening treatment needs to be performed by properly dipping for a predetermined time, it has been conventionally performed as follows. That is, of the three racks 201 to 203, first, the work group W1 at the head (the right end in the drawing) that has been submerged for a predetermined time is moved to the rack 201.
Then, it is pulled up from the roughening treatment tank 101, advanced (carried) to above the tank 102 in the next step, and put in the liquid in the tank.

Next, in the roughening treatment tank 101, the second work group W2 from the right following the first work group that has just been pulled up is lifted up slightly with the rack 202 so that it does not come out of the liquid surface, and is now pulled up. The work group W1 at the head is moved forward to a position where the rack 202 is lowered and immersed in the liquid. Here, the forward movement (movement) in the tank 101 is such that the work group is moved so as not to come out of the liquid surface because the treatment (submergence) becomes discontinuous when taken out of the treatment liquid even for a short time. This is because it hinders the stability of processing.

When the first work group is pulled up, the third work group W3 at the rear end, which is the third work group W3 from the right, is lifted up slightly together with the rack 203 so that it does not come out of the liquid surface, and the second work group W3 from the right The work group W2 is moved forward to the position where the work group W2 was located, and the rack 203 is lowered at that position and immersed in the liquid. Next, the first work group (not shown) in the processing bath 100 for the pre-process of the roughening process is pulled up together with the rack from the processing bath, and this is roughened processing bath 101.
Is moved forward to the position where there was the third work group W3 from the right above, and the rack is lowered at that position and immersed in the liquid. In this way, each of the three work groups in the roughening treatment tank 101 is successively advanced after a predetermined time has passed, and each work group is allowed to stay in the roughening treatment liquid for a predetermined time to perform a desired treatment.

By the way, such a work group is pulled up together with a rack to move (transport) from one tank to another tank,
The forward movement (movement) in the same tank has conventionally been performed by a hoist (electric hoist). This hoist was provided so as to be able to travel on a linearly arranged track on a processing line in which a large number of processing tanks were linearly arranged. There are multiple hoists on one track, run them to a predetermined position, and pull up the rack with the pulling hooks.
I was taking it down.

[0008]

In such a processing step, dozens of processing tanks are arranged, and a plurality of work groups are usually immersed in each processing tank. And the processing time in each processing tank is set differently. On the other hand, in order to stabilize the processing, each work group needs to be sequentially moved at a predetermined set time as described above.

Therefore, in the conventional manufacturing method, it has been necessary to cause a plurality of hoists to reciprocate on the line frequently and in a complicated manner. In addition, the lifting stroke of the rack is different between the movement within the same tank and the movement between different tanks as described above. For this reason, there is a problem that it is not easy to control the hoist.

In addition, the plurality of hoists can be run only within a range where they do not interfere with each other. In addition, the number of hoists that can be installed is naturally limited in order to avoid interference. Therefore, in some cases, a waiting time must be provided for raising and lowering the rack, which hinders improvement in productivity (processing efficiency).

The present invention has been made in view of these problems, and enables a work to advance in the same tank without using such hoists, thereby reducing the number of hoists to be installed and controlling the hoists. It is possible to simplify the manufacturing process, reduce the waiting time of the hoist as much as possible, and improve the productivity.

[0012]

In order to achieve the above-mentioned object, a method for manufacturing a wiring board according to a first aspect of the present invention is a method of manufacturing a wiring board work-in-process product suspended from a suspension body in a processing tank. In the step of performing a predetermined treatment by immersing in a liquid, when advancing in the treatment tank, the screw shafts extend back and forth along the upper edges of both sides of the treatment tank in the front-rear direction. When the suspension is arranged so as to be rotatable around the axis and regulated in the movement in the axial direction to be supported, respectively, while the hanging body can be bridged on the screw shafts on both sides and when it is bridged. The screw shaft so that it can be engaged with the screw, and the suspension body is suspended on the screw shafts on both sides in a meshed state with the screw by rotating the screw shafts on both sides simultaneously. Move the lower body forward, The suspension body hung wiring board work piece, characterized in that it comprises a step of advancing while being immersed in the liquid of the processing tank.

According to this manufacturing method, since the movement within the same tank is performed without depending on the hoist traveling on the track provided on the processing tank, the control of the hoist becomes correspondingly simple. At the same time, the waiting time can be reduced. Therefore, the efficiency of the process is improved, and the production efficiency is expected to be improved. In addition, since the movement in the same tank is performed by the above-mentioned means, it can be moved forward without complicating its structure or mechanism, and its forward movement can be easily controlled. Further, the work-in-progress of the wiring board hung and carried by the suspension body from another tank may be obtained by suspending the suspension body at a predetermined position on both screw shafts. .

According to a second aspect of the present invention, the screws of the screw shafts on both sides are reverse screws having the same diameter and the same pitch, and the screw shafts on both sides are rotated in opposite directions (rotate in opposite directions). The method for manufacturing a wiring board according to claim 1.

In this way, for example, one screw shaft is a normal right screw and the other screw shaft is a left screw, and the screw shafts are rotated in reverse at the same number of revolutions, whereby the suspension body is made into a tank. Can be advanced at the same speed on both sides of. Therefore, no special guide is required.

The invention according to claim 3 is characterized in that the screw shafts on both sides are made of plastic.
2 is a method for manufacturing a wiring board.

By doing so, the screw shaft can be easily machined, and it is effective for preventing wear of the suspension body which is usually made of a steel material such as stainless steel.

The invention according to claim 4 is characterized in that the suspending body is floated from the screw shafts on both sides when it is not advanced. It is a method of manufacturing a wiring board.

By thus suspending the suspending body from the screw shafts, the suspending body can be moved up and down in the suspended state, so that the surface of the substrate becomes liquid in the processing liquid. Since it becomes easy to get wet, the treatment is performed stably.

According to a fifth aspect of the present invention, the wiring board in-process product is used as a processing tank for immersing the wiring board in-process product suspended in the suspension body in a liquid to perform a predetermined treatment. Along with the upper edges on both sides with respect to the front-rear direction to be fed, the axis line is arranged so as to extend in the flow direction, is rotatable about the axis line, and is provided with screw shafts on both sides supported by restricting movement in the axial direction. , A rotation driving means for simultaneously rotating the screw shafts on both sides is provided, and the hanging body is formed so as to be bridged over the screw shafts on both sides, and when the suspension body is bridged, The suspension is capable of meshing with a screw, and the suspension is rotated by simultaneously rotating the screw shafts on both sides in a state where the suspension is engaged with the screw on the screw shafts on both sides. Advance the suspension body The hung wiring board work piece, and wherein the advancing while immersed in the liquid of the processing bath, a forward unit in the wiring board work piece in the processing bath.

According to a sixth aspect of the present invention, the screws of the screw shafts on both sides are reverse screws having the same diameter and the same pitch, and the screw shafts on both sides are reversely rotated by the rotation driving means. The advancing device in a processing tank for a work-in-process for a wiring board according to claim 5, which is characterized in that.

The invention according to claim 7 is characterized in that the screw shafts on both sides are made of plastic.
Or the advancing device in the processing tank for the work in process of the wiring board in process according to any one of 6).

The invention according to claim 8 is characterized in that a hanging body lifting means for lifting the hanging body to lift it from the screw shafts on both sides when the hanging body is not advanced is provided. Alternatively, the advancing device is provided in the processing tank for the work-in-process for the wiring board according to any one of items 1 to 7.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to FIGS. In the figure, reference numeral 1 denotes a processing tank (for example, a roughening processing tank for the surface of a work (substrate)) used in this embodiment, and the traveling direction of the work is from left to right in FIG. Further, separate tanks (not shown) are arranged on the left and right sides of the processing tank 1, and a large number of tanks are arranged in tandem. An unillustrated hoist orbit is provided above these processing tanks.

In the present embodiment, the processing tank 1 has a plan view,
It is rectangular and has a substantially rectangular parallelepiped shape, and has a container shape with an upper opening, and is formed of a stainless steel plate, an angle, a strip plate, or the like. Then, the processing liquid (not shown) E is contained in the inside thereof up to a predetermined level. However, the treatment liquid is supplied from a plurality of inlets 3 provided at the lower part of the tank 1,
It is set so as to be pressure-fed through a pump and a pipe (not shown), jetted into a tank, stir and mix the liquid inside, and to touch the immersed work. In addition, the liquid is returned to the management tank through a return pipe (not shown) connected to the left and right flanges 5 in a front view, and is configured to reflux. As shown in FIG. 4, a partition wall 4 is provided in the front and rear portions of the inside of the tank, and overflows from three horizontally long elongated rectangular openings 4a provided at the upper portion of the partition wall 4 and the flange 5 It is set so that it will be sent to the piping connected to and returned to the management tank.

Next, a work advancing device in such a processing tank 1 will be described. In the present embodiment, the screw shafts 11 are arranged along the upper edges of both sides of the processing layer in the front-rear direction in which the processing tanks 1 are arranged in a row, that is, in the front-rear direction in which the in-process products of the wiring board made of resin are fed (the left-right direction in FIG. 1). It is provided. The screw shaft 11 is arranged such that the axis line G extends in the flow direction of the work (left and right direction in FIG. 1), and is supported by bearings 13 and 13 at both ends thereof so as to be rotatable around the axis line, and the movement in the axis line direction is restricted. Has been done. And this 2
The both screw shafts 11 of the book are set to rotate at the same number of rotations at the same time by a rotation driving means including a reduction motor 21 and the like. However, in this embodiment, both screw shafts 1
Although 1 and 11 have the same diameter and the same pitch, they are reverse screws, and are set to rotate both screw shafts 11 in reverse. The rotation is driven by the reduction motor 21 by the chain 23 or the like to rotate the drive shaft 25, and the timing pulleys 27 attached to both ends of the drive shaft 25,
Through the timing belt 29 or the like, each screw shaft 11
It is set so that the connecting shaft 15 attached to the end portion of the shaft is rotationally driven via the bevel gears 17 and 18 that mesh with each other. The screw shaft 11 is made of a plastic round bar (for example, polytetrafluoroethylene resin) and is a trapezoidal screw in this embodiment.

On the other hand, in FIG. 1, three rod-shaped suspension members 31 are provided on both screw shafts 11 and 11 at equal intervals at both end portions thereof, respectively, so as to be engaged with the screws. It has been bridged. However, each hanging body 31
In the present embodiment, both end portions 31a have a substantially square cross section, and are arranged so that their diagonal directions are vertical and the corners mesh with the roots of the screws of the screw shaft 11. Then,
Under this condition, the hanging body 31 can be fed rightward in FIG. 1 by simultaneously rotating both screw shafts 11 in opposite directions in the set direction. By the way, since the screw shaft 11 is made of plastic, it is not necessary to use a lubricant for the hanging body 31 that meshes with the screw shaft 11, and wear of the hanging body 31 is reduced. Further, by using the reverse screw, it is possible to stably and straightly advance the hanging body 31 without a guide.

The suspension 31 is provided with a resin wiring board work-in-process product (work) W (for example, an insulating layer (substrate) made of epoxy resin) through a mounting and holding jig 35 (not shown). Wiring board with copper wiring, etc.)
Are suspended. Then, the work W is a liquid in the processing tank 1 (for example, KMn for surface roughening treatment of the insulating layer).
It is immersed in an O ₄ liquid or the like) and is configured to be movable in the tank together with the hanging body 31 according to the movement of the hanging body 31. In this embodiment, three (book) hanging bodies 31 are placed on the screw shaft 11 at a constant interval in the same state. The liquid is pumped into the tank 1 through the inflow port 3, and the mixing and stirring action of the liquid works by the flow force,
Although not shown, the steady rests of the suspended work are arranged at appropriate places.

As mentioned above, FIG. 1, FIG. 2 and FIG.
The state where the hanging body 31 is supported by both screw shafts 11 is shown, and this shows the case where the hanging body 31 is moved forward. On the other hand, FIGS. 5 to 7 show the case where the hanging body 31 is not moved forward.
Lifting means lifting means 4 for floating the screw shaft 11 from both screw shafts 11.
1 shows the state of being lifted. That is, in the present embodiment, the hanging body 31 includes the side surfaces 8 of the tank 1,
The lifting air cylinders 42, which are respectively fixed to the outside of the center of the vehicle 8, are configured to move up and down as follows. At the tip of the rod 43 of the air cylinder 42, a support plate 45 that extends substantially horizontally along the front-rear direction (work flow direction) is attached to the side surface 8 of the tank 1. Further, the receiving plates 47 for receiving the end portions of the respective hanging bodies 31 are attached and fixed to the supporting plate 45 at three positions so as to project above the supporting plate 45. Backing plate 47
Is a position corresponding to the hanging body 31, and the upper portion is formed in a notch shape that spreads in a V-groove shape of 90 degrees, and the V-groove bottom 48 is formed with a vertically long slit 49 having a constant width. There is. The bottom of the slit 49 has a V groove shape of 90 degrees. A small cylinder 51 is fixed below the slit 49 of each receiving plate 47 so as to move up and down with the tip of its rod 52 facing upward.

Hanging body lifting means 4 in this embodiment
When the rod 43 of the lifting air cylinder 42 is moved forward (moved up) by the stroke, the hanging body 3 is placed in the slit 49 of the receiving plate 47 attached to the supporting plate 45.
The end 31a of No. 1 slides down and the slit 49
It is set to be supported at the bottom of the groove. At this time,
Tip of rod 52 of small cylinder 51 and suspension 31
It is set so that a slight gap is maintained with the lower end of the end portion 31a. Then, the lower end of the end of the hanging body 31 is set so as to be slightly above the screw shaft 11. Thus, in this state, the small cylinders 5 corresponding to the ends of the suspension 31 are provided on both sides of the tank 1.
It is set so that the suspension body 31 and the work W suspended by the suspension body 1 are vertically moved by vertically moving 1 by moving the rod 52 in synchronization with each other by the same stroke. As a result, the surface of the substrate in the treatment liquid is easily wet with the liquid.

On the other hand, when the hanging body lifting means 41 in the present embodiment moves the rod 43 of the lifting air cylinder 42 backward (moves down) by the stroke, FIG.
In the state shown in FIGS. 2 and 4, as described above, the lower end of the end portion 31a of the hanging body 31 is placed, that is, meshed with the upper end of the screw of the screw shaft 11. In addition, the rod 43 of the lifting air cylinder 42 is moved backward by the stroke (downward movement).
When this is done, the upper end of the receiving plate 47 is configured to be lower than the upper end of the screw of the screw shaft 11 so as not to hinder the forward movement of the hanging body 31. Therefore, when the hanging body 31 is advanced on the screw shaft 11, the support plate 45 and the receiving plate 47 move the rod 43 of the lifting air cylinder 42 downward by the stroke, and otherwise, basically. On the contrary, the suspension 31 and the work W suspended by the suspension 31 are moved up and down by driving the small cylinder 51.

When using the advancing device for the work W in the processing tank 1 described above, the procedure is as follows. That is, when the predetermined processing time has passed in the processing tank 1,
The rod 52 of the small cylinder 51 is retracted to stop its driving, and the rod 43 of the lifting air cylinder 42 is retracted by the stroke. By doing so, the state shown in FIGS. 1, 2, and 4 is obtained. Then, for example, pull up the rightmost hanging body 31 in FIG.
The suspended resin-made wiring board work-in-progress product is carried to a processing tank (not shown) in the next step. This transportation is performed by a conventional hoist using a lifting hook F that hangs down from the hoist, and a hanging piece 3 provided near both ends of the hanging body 31.
7 is hooked and pulled up, and the hoist is caused to travel to advance to a predetermined position in the tank for the next step and lowered at that position. This is the same as the conventional one.

After that, both screw shafts 1 in the main processing tank 1
At the same time, 1 and 11 are reversely rotated in the set direction. By doing so, the two remaining work groups are separated from each other by the two hanging bodies 3.
1 and 1 simultaneously in the tank 1 and while being immersed in the liquid. Both screw shafts 11
With regard to the two suspensions 31, the number of rotations thereof may be set until the two suspensions 31 come to the positions of the slits 49 of the front receiving plate 47, respectively, and the two suspensions 31 may be rotated by the rotation driving means.
Incidentally, in the present embodiment, the screw of the screw shaft 11 located on the upper side in FIG. 3 is a right screw, and the screw shaft 1 located on the lower side is
The screw No. 1 is the left screw. Therefore, in this embodiment, when the axes of both screw shafts are viewed from the left side of FIG. 3, the upper right screw screw shaft 11 is rotated counterclockwise and the lower left screw screw shaft 11 is rotated.
Is rotated clockwise, the two hanging bodies 31 move (forward) to the right side in FIG. If both screw shafts are rotated in the opposite directions, they move to the left side (reverse) in FIG.

As described above, according to the present invention, the resin-made wiring board work-in-process product suspended from the suspension 31 is immersed in the liquid in the processing tank 1 without using a hoist as in the conventional case. You can easily move forward. Moreover, since the movement can be performed only by rotating the screw shafts 11 and 11, the control is extremely simple, and the waiting time for moving the workpiece in the same processing tank can be eliminated, so that the processing time can be shortened. Planned. Therefore, improvement in the manufacturing efficiency of the wiring board is expected. further,
Since the hoist can handle only the movement of the work between different tanks, the number can be reduced,
Since it is possible to reduce the chances of mutual interference between the hoists when the hoists travel on the track, the control of the hoists can be simplified.

After the movement of the workpiece in the same tank is completed, the rod 43 of the lifting air cylinder 42 is advanced (moved up) by the stroke. Then, at the position of the slit 49 on the third receiving plate 47 from the right, the first work group in another processing tank for the pre-process of the roughening process is suspended by a hoist (a rack).
The whole 31 is pulled up from the processing tank, moved forward, and lowered at that position. At this time, in the present embodiment, the receiving plate 47
Since the upper portion of the V groove has a wide V groove bottom 48, even if there is some positional error, it can be received without any problems and guided to the slit 49. Thus, since the three work groups are immersed in the liquid and the three hanging bodies 31 are lifted from the screw shaft 11, in that state,
As described above, the left and right small cylinders 51 are vertically moved in synchronism with each other at both ends of each hanging body 31 to continue the surface roughening treatment, and the steps of a predetermined treatment line are successively performed.

In the above embodiment, since the screws of the screw shafts are reverse screws to each other, there is no need for a guide for advancing the hanging body. However, both screw shafts are not reverse screws but normal screws, and May be provided. Moreover, since both screw shafts are made of plastic, the manufacturing thereof becomes easy. In this embodiment, in order to secure the wettability with the liquid on the surface of the work, the description has been given to the configuration in which each hanging body is moved up and down by the small cylinder 51, but there is a problem with such wettability. Without it, such up-and-down movement can be eliminated. Further, in the present embodiment, the hanging body 31 is configured to be lifted by the hanging body lifting means 41 that floats from the screw shafts 11. However, if vertical movement of each hanging body by the small cylinder 51 is not necessary, The suspension 31 may be supported by both screw shafts at all times.

Further, the suspension body hung over both screw shafts and the screw are meshed with each other so that both ends of each suspension body have a substantially square cross section, and the diagonal direction is vertical.
The corner is made to mesh with the root of the screw of the screw shaft, but the present invention is not limited to this. However, in the case where both ends of the hanging body have a substantially square cross section and the diagonal directions thereof are vertical as described above, the meshing can be realized with a simple structure.

In the above-described embodiment, the case of embodying it in the roughening treatment tank has been described, but the present invention is not limited to this. For example, it can be applied in each treatment tank for roughening, plating, etching, cleaning, activating, and developing the wiring. Further, the present invention can be appropriately modified and embodied without departing from the spirit of the invention. For example, the material of the wiring of the wiring board and the substrate (insulating layer) is not limited to the above-described embodiment, and a known material can be used.

[0039]

As is apparent from the above description, according to the present invention, a plurality of work groups set on a hanging body are moved forward in the same processing tank only by rotational driving of a screw shaft without using a hoist. It is what makes me. Therefore, the number of hoists to be installed can be reduced and the control can be simplified, and the waiting time of the hoist can be reduced. Therefore, the productivity of the wiring board can be improved accordingly.

[Brief description of drawings]

FIG. 1 is a view of a processing tank according to the present invention seen from a side view when a hanging body lifting means is lowered and an enlarged view of a main part.

FIG. 2 is an enlarged view of part A in FIG.

FIG. 3 is a plan view of the processing tank of FIG.

FIG. 4 is a vertical sectional view of FIG.

FIG. 5 is a side view of the processing tank according to the present invention when the hanging body lifting means is raised and an enlarged view of a main part.

6 is an enlarged view of part B in FIG.

7 is a vertical cross-sectional view of FIG.

FIG. 8 is a conceptual side sectional view for explaining movement of a work in a conventional processing tank.

[Explanation of symbols]

1 processing tank 11 screw shaft 21 Deceleration motor (rotation drive means) 31 Suspended body 41 Suspended body lifting means W work (work in progress for wiring board) E liquid Axis of G screw shaft

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4K022 AA02 AA42 BA08 CA02 CA03                       CA17 DA01 DB15                 4K057 WA05 WM03 WM11 WM18 WN01                 5E343 AA02 AA11 FF16

Claims (8)

[Claims] 1. A process tank in which a work-in-process for a wiring board suspended from a suspending body is immersed in a solution in a process tank to perform a predetermined process, and is advanced in the process tank. Along the upper edges of both sides with respect to the front-rear direction, the screw shafts are arranged to extend in the front-rear direction so that they can be rotated around the axis and are supported by restricting the movement in the axial direction. The hanging body is made to be able to be bridged on the screw shafts on both sides and to be meshed with the screw when being bridged, and the hanging body is to be screwed on the screw shafts on both sides. The screw shafts on both sides are rotated at the same time in a state of being bridged in a meshed state with each other to advance the suspension body, and the wiring board work-in-process product suspended from the suspension body is transferred to the liquid in the processing tank. Move forward while immersed in A method of manufacturing a wiring board, comprising: 2. The method for manufacturing a wiring board according to claim 1, wherein the screws of the screw shafts on both sides are reverse screws having the same diameter and the same pitch, and the screw shafts on both sides are reversely rotated with respect to each other. 3. The method for manufacturing a wiring board according to claim 1, wherein the screw shafts on both sides are made of plastic. 4. The suspension body is floated from the screw shafts on both sides when the suspension body is not advanced.
The method for manufacturing a wiring board according to claim 1, 2, or 3. 5. A processing tank for dipping a work-in-process wiring board suspended in a hanging body in a liquid to perform a predetermined treatment is provided on both sides in the front-back direction of the work-in-process wiring board. Along the upper edge, the axis line is arranged so as to extend in the flow direction, is rotatable about the axis line, and is provided with the screw shafts on both sides supported by restricting the movement in the axial direction. The suspension body is configured to be capable of being rotated at the same time, and the suspension body is formed so as to be capable of being bridged on the screw shafts on both sides, and is capable of meshing with the screw when the suspension body is bridged. While the suspension body is suspended on the screw shafts on both sides in a state of being meshed with the screw, the suspension shafts are moved forward by rotating the screw shafts on both sides at the same time. Wiring base suspended on A device for advancing a work-in-process for a wiring board in a treatment tank, characterized in that the work-in-progress product is advanced while being immersed in the liquid in the treatment tank. 6. The screw shafts on both sides are reverse screws having the same diameter and the same pitch, and the screw shafts on both sides are reversely rotated by the rotation driving means. An advancing device for processing a work-in-process for a wiring board described in a processing tank. 7. The advancing device in a processing tank for a work-in-process for a wiring board according to claim 5, wherein the screw shafts on both sides are made of plastic. 8. The suspension body lifting means for lifting the suspension body when it is not moved forward so as to float from the screw shafts on both sides, according to claim 5, 6, or 7. Advance device in the processing tank for the work in progress of the wiring board.