JP3321120B2 - Chemical treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a chemical processing apparatus. That is, the present invention relates to a chemical processing apparatus such as a developing apparatus or an etching apparatus, which is used in a manufacturing process of a printed wiring board and performs a chemical treatment by spraying a chemical such as a developing solution or a corrosive liquid on a printed wiring board material to be conveyed. It is.

[0002]

2. Description of the Related Art First, the technical background of a printed wiring board will be described. Recently, miniaturization and weight reduction of electronic devices,
The density of the printed wiring board has been remarkably increasing, and the printed wiring board, which is an important component thereof, has recently been further reduced in size, finer, and multi-layered. And the miniaturization and ultrafineness are progressing. In particular, the circuit formed on the outer surface of such a printed wiring board has been extremely miniaturized, highly accurate, and highly densified. On the other hand, conventionally, in a general printed wiring board, the limit value of the circuit width is about 150 μm, and even in a CSP or PBGA involving a semiconductor chip, the limit value of the circuit width (conductor width) is about 50 μm to 60 μm. However, recently, even a general printed circuit board is required to have a circuit width of 40 μm or less. For example, if the circuit width is 20μ and the space between circuits is 30μ
Even a degree may be required. As described above, with respect to the circuit of the printed wiring board, the circuit width tends to be miniaturized, and the tolerance of such a circuit width is required to be within ± 5% or so. The cross-sectional shape of the circuit to be formed is also as close as possible to a square or a rectangle, that is, not a trapezoidal shape or a substantially Mt. Fuji shape, but as close as possible to a vertical convex shape.

[0003] By the way, such a printed wiring board is prepared by cutting a printed wiring board material in which a copper foil is adhered to an insulating base material → drilling, polishing and plating for through holes →
Manufacturing by sequentially and successively following many processes such as coating and drying of an etching resist or pasting → exposure by applying a negative film for circuit → development → etching → stripping of etching resist at the circuit part etc. Is done.
In such a developing process and an etching process of the printed wiring board material, the printed wiring board material is conveyed in a horizontal position by a conveyor in a processing chamber of each chemical processing apparatus, and a chemical solution such as a developing solution or a corrosive solution is used. Is sprayed from a number of spray nozzles disposed opposite to each other at a uniform spray pressure, whereby a chemical treatment such as development or etching is performed, thereby forming a circuit. As described above, in a printed wiring board in which circuit miniaturization, high precision, and high density are progressing, such chemical processing such as development and etching is performed uniformly as a whole, for example, etching is performed. It is extremely important that the operation is performed with high accuracy and uniformity as a whole.

[0004]

By the way, the following problems have been pointed out with respect to conventional chemical processing apparatuses such as a developing apparatus and an etching apparatus for performing chemical processing such as development and etching. That is, as shown in the plan view of FIG. 5, the printed wiring board A (printed wiring board material B) has a circuit C in the vertical direction (longitudinal direction in the drawing) as shown in FIG. Formed type, (2)
As shown in the drawing, the type in which the circuit C is formed in the horizontal direction (the short direction in the drawing), and as shown in FIG. A type in which a circuit C and a horizontal circuit C are mixedly formed,
And so on. The sprayed chemicals, such as a developing solution and a corrosive solution, primarily flow on the outer surface of the printed wiring board material in the left and right width directions and flow down and out of the left and right sides. Is also affected by the circuit C formed on the outer surface. That is, the injected chemical tends to flow easily through each circuit C and the space D between the circuits between the circuits C.
I can't miss it.

[0005] That is, in this type of conventional chemical processing apparatus, as shown in FIG. 5 (1), a printed wiring board material B of a type in which a circuit C is formed in a vertical direction on the outer surface.
When the chemical is ejected while transporting the vertical direction as the front and rear transport directions, a considerable portion of the chemical becomes turbulent and passes through the outer surface of the printed wiring board material B through the vertical inter-circuit space D. The tendency to flow stagnation increases. Accordingly, chemical processing such as development and etching of the circuit C is speeded up accordingly. On the other hand, as shown in FIG. 5 (2), the chemical solution is transferred while the printed circuit board material B of the type in which the circuit C is formed in the lateral direction on the outer surface is transported with the longitudinal direction being the forward and backward transport directions. Is injected, the chemical flows on the outer surface of the printed wiring board material B through the inter-circuit space D in the lateral direction, and the above-described first lateral flow in the lateral direction is further promoted. . Therefore, the chemical processing such as development and etching of the circuit C is slower in speed than the case of FIG.

[0006] As described above, the chemical solution to be sprayed is uniformly sprayed toward the printed wiring board material B as a whole.
The sprayed chemical is affected by the vertical and horizontal directions of the circuit C formed on the printed wiring board material B, and the vertical circuit C and the horizontal circuit C have different chemical processing speeds such as development and etching. A speed difference occurs. Therefore, as shown in FIG. 5C, one printed circuit board A (printed circuit board material B) includes a circuit C in the vertical direction and a circuit C in the horizontal direction.
However, in the case of the mixed type (there are many such types in practice), the problem is that the uniformity of the chemical treatment such as development and etching is impaired as a result. It had been. That is, in the conventional chemical liquid processing apparatus of this type, considering the circuit C in the vertical direction as a standard,
While chemical processing such as development and etching of the horizontal circuit C is delayed or insufficient, when the horizontal circuit C is considered as a standard, the chemical processing of the vertical circuit C is over or excessive.

As described above, in the conventional chemical liquid processing apparatus of this type, the overall uniformity of the chemical processing such as development and etching of the printed wiring board A (printed wiring board material B) is impaired. Irregularity and unevenness and excess and deficiency points were likely to occur. As a result, the formed circuit C has a non-uniform circuit width, a trapezoidal shape or a substantially Mt. Fuji-shaped cross-sectional shape occurs, and even the circuit C disappears (based on over- or excessive chemical treatment). ), Circuit C
This has been a fatal problem for printed wiring boards, which are becoming finer, more precise, and more dense.

In view of such circumstances, the present invention has been made as a result of intensive research efforts of the inventor in order to solve the above-mentioned problems of the prior art, and is a direction changing device provided with a predetermined turntable and the like. By changing the direction of the printed wiring board material to be conveyed at an angle other than 90 degrees on the way, the uniformity of the chemical treatment is improved, and this is reliably and easily realized. Accordingly, an object of the present invention is to propose a chemical solution processing apparatus such as a developing apparatus or an etching apparatus, in which a circuit width is made uniform, a cross-sectional shape of a circuit approaches a square or a rectangle, and a situation in which a circuit disappears is prevented. .

[0009]

The technical means of the present invention for solving such a problem is as follows. This chemical solution processing device is used in a manufacturing process of a printed wiring board,
Inject chemicals to the printed wiring board material being transported,
Perform chemical treatment. The printed wiring board material is conveyed in a horizontal posture on a conveyor, and the chemical is sprayed from a number of spray nozzles disposed opposite to the conveyed printed wiring board material. A direction change device is incorporated between the front and rear conveyors, and the direction change device changes the direction of the printed wiring board material to be conveyed at an angle other than 90 degrees along a horizontal plane, and The left and right sides are turned toward the left and right sides, and the left and right sides are turned toward the front and rear sides. The printed wiring board material has a 9-cm gap between the circuits formed on the outer surface.
The conveyor is not set to be orthogonal to 0 degrees, or the conveyor is set so that the vertical and horizontal circuit directions do not exactly match the front and rear transfer directions and the left and right width directions. The direction changing device includes a next wheel and a turntable. That is, a large number of wheels are disposed at a predetermined interval pitch in the left and right width direction and the front and rear transport direction, and are capable of mounting and transporting the printed wiring board material, and have a size corresponding to the printed wiring board material. The wheel is provided with a turntable in which a large number of openings are entirely formed at intervals and pitches so that the wheel can be freely inserted in a vertical, horizontal or oblique direction. The turntable is capable of ascending and descending above and below the height level of the upper end of each of the wheels, and is capable of lifting the printed wiring board material and rotating at an angle other than 90 degrees. The direction of the substrate material can be changed at an angle other than 90 degrees. The specific rotation angle of the turntable excluding 90 degrees, that is, the specific direction change angle of the printed wiring board material excluding 90 degrees is the vertical and horizontal direction of the printed wiring board material. The angle is set so as to correspond to the angle between the circuits or the above-described vertical and horizontal circuit directions and the shift between the front and rear transport directions and the left and right width directions.

According to the present invention, the following is achieved. This chemical solution processing apparatus is used in a manufacturing process of a printed wiring board, and a chemical solution such as a developing solution or a corrosive solution is sprayed from a large number of spray nozzles onto a printed wiring board material conveyed in a horizontal posture on a conveyor. , Chemical processing such as development and etching. The sprayed chemical liquid firstly flows on the outer surface of the printed wiring board material in the width direction on the left and right, and then flows down from both sides, but is formed secondarily on the outer surface. There is also a tendency to flow through the inter-circuit space due to the influence of the circuit, and as it is, a speed difference occurs in the chemical treatment depending on the circuit direction. Therefore, in this chemical treatment apparatus, a direction changing device is incorporated between the conveyors, and the printed wiring board material to be conveyed is turned on a horizontal plane halfway. By changing the direction in this way, the adverse effects of the circuit direction and the speed difference are eliminated, and the chemical treatment becomes uniform.

By the way, a. In printed wiring boards (materials), circuits are often formed in the vertical direction and the horizontal direction on the outer surface, but such vertical and horizontal circuits are not exactly 90 degrees orthogonal to each other. Often. b. Furthermore, printed wiring board materials that have begun to be conveyed on a conveyor are often positioned without the vertical and horizontal circuit directions accurately matching the front and rear conveyance directions and the left and right width directions. c. It is not easy to change the direction of the conveyed printed wiring board material by exactly 90 degrees using the direction changing device, and it is easier to control the direction by changing the direction at an angle other than 90 degrees. Therefore, the direction changing device is configured to change the direction of the printed wiring board material to be conveyed at an angle other than 90 degrees. The direction changing device includes a plurality of wheels arranged in front, rear, left and right, and a turntable that has a plurality of openings corresponding to the respective wheels and is capable of moving up and down and rotating at an angle other than 90 degrees. In this case, the printed wiring board material is turned at an angle other than 90 degrees. The specific rotation angle other than 90 degrees of the turntable corresponds to the angle between the vertical and horizontal circuits of a described above, or the deviation between the vertical and horizontal circuit directions of b and the transport direction and the width direction described above. The angle is set.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. FIG. 1, FIG. 2,
3 and 4 are used for describing an embodiment of the chemical solution treatment apparatus according to the present invention. FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3 is a side view of a direction changing device and the like.
FIG. 3 is an explanatory plan view of a direction changing device and the like. FIG. 5 is an explanatory plan view for explaining a printed wiring board (material), and FIG. 5A shows an example in which a circuit is formed in a longitudinal direction.
FIG. 2B shows an example in which the circuit is formed in the lateral direction, and FIG.
The figure shows an example in which a circuit is formed in a longitudinal direction and a lateral direction. FIG. 6 is a sectional view of a printed wiring board (material),
(1) The diagram is provided for explanation of circuits and spaces between circuits, etc.
FIG. 2B shows an example of a good circuit, and FIG. 3C shows an example of a bad circuit.

This chemical solution processing apparatus includes a printed circuit board A
Used in the manufacturing process. First, the premise of the printed wiring board A will be described with reference to FIG. 5 and FIG.

The printed wiring board A is used for various types of OA equipment, a mobile phone, a computer, a computer, a variety of other electronic equipment with the development of multimedia. There is a great variety and the manufacturing process is also great. Printed circuit boards A can be classified into single-sided boards, double-sided boards, multilayer boards (including those based on recent build-up methods), flexible boards, etc. , PBGA have also appeared.
In recent years, the printed circuit board A has been significantly reduced in size, weight, ultra-thinness, flexibility, multilayering, and the like, and in particular, the circuit C is becoming finer, more precise, and more dense. Then, such a printed wiring board A is manufactured, for example, as follows. That is, the printed wiring board A
Is for laminating, polishing and cutting sequentially for the printed wiring board material B as a material → drilling, polishing, plating and polishing for through holes → coating / drying or pasting of etching resist → exposure → development → etching → circuit C portion It is manufactured by continuously following many steps such as stripping of an etching resist.

The method of manufacturing the printed wiring board A will be described in more detail. First, after copper foil is laminated and laminated on both surfaces of an insulating base material such as polyimide by hot pressing or the like, cleaning and polishing are performed. Then, the printed wiring board material B, which is, for example, a double-sided copper foil-clad laminate obtained through such a pretreatment step, is cut into a short piece of a work size, and then subjected to a through-hole forming process. After the cleaning and the double-side polishing, the plating is performed. As a result, the inner wall of the through hole is also plated so as to conduct the circuit C on the front surface and the circuit C on the back surface.
(Notwithstanding these, as printed wiring board material B,
In some cases, a single-sided copper foil-clad laminate in which copper foil is adhered to only one side of the insulating base material is used.In this case, the application of a photosensitive resist described below is also performed on only one side, The present invention is, of course, applied to such a printed wiring board material B for a single-sided board. ) Through hole is for one printed wiring board material B (printed wiring board A).
As many as several hundreds or thousands of extremely small diameters are formed.

After that, the printed wiring board material B is again cleaned, polished, cleaned, dried, etc.
An etching resist, that is, a photosensitive resist serving as an alkali-resistant or acid-resistant protective film is applied and dried to form a coating film. Then, after exposing a circuit C photograph, which is a negative film of the circuit C, to an outer surface of the circuit C such as an upper surface or a lower surface on which the circuit C is formed, the photosensitive resist leaves the exposed and cured circuit C portion, and other portions. Unnecessary portions are dissolved and removed by spraying the developing solution as the chemical solution E (see also FIG. 1 described later). Thereafter, the printed wiring board material B is washed and dried, and then the photosensitive resist is hardened and the coated and protected copper foil of the circuit C is left, and the photosensitive resist is dissolved and removed as described above. The unnecessary portion of the copper foil is dissolved and removed and etched by spraying a corrosive solution as the chemical solution E (see also FIG. 1 described later). then,
After the remaining photosensitive resist in the above-described cured circuit C portion is dissolved and removed by spraying a stripping solution as a chemical solution E,
After being washed and dried, a printed circuit board A on which a predetermined circuit C is formed is obtained.

The printed wiring board A has, for example,
50mm × 550mm, 500mm × 500mm, 50
It has a size of about 0 mm x 300 mm, and its thickness is
The portion of the insulating base material is, for example, about 0.06 mm, and the portion of the circuit C made of copper foil is extremely thin, for example, to about 0.018 mm. Even when such a printed wiring board A is a multilayer board in which four layers or the like are stacked, the overall thickness is 1.
The thickness is becoming extremely thin, from 0 mm to 0.8 mm and further to about 0.4 mm. Also, the circuit width F tends to be reduced from 150 μ to 70 μ and further to 40 μ, and there is a need for a circuit width F of 20 μ and a space D between circuits of about 30 μ.

For the printed wiring board A manufactured by following these steps, a protective film of the formed circuit C is formed as a post-processing step which is a part of the manufacturing process. That is, first, a photosensitive resist, which is a solder resist, is applied to the entire surface of the printed circuit board A on which the circuit C is formed, on which the circuit C is formed, and then dried to form a coating film. Then, exposure and development are carried out by applying a negative film, and only the photosensitive resist in a part mounting part such as a through-hole part, that is, a part where soldering is to be performed afterwards is exposed by dissolving and removing (these steps are: Almost according to the above-described steps). In this manner, the protective film made of the photosensitive resist is formed on the printed wiring board A, and thus the circuit C formed as described above is protected. In other words, the circuit C of the printed wiring board A is protected from the adhesion of the solder to the component mounting portion after the fact. The printed wiring board A is manufactured by following such a process.

Hereinafter, the chemical processing apparatus will be described with reference to FIGS. 1, 2, 3 and 4. The chemical processing apparatus such as the developing apparatus and the etching apparatus is used in a manufacturing process such as a developing process and an etching process of the printed wiring board A as described above, and prints a thin substrate which is conveyed in a horizontal posture by the conveyor 1. A chemical solution E such as a developing solution or a corrosive solution is sprayed from a large number of spray nozzles 2 disposed opposite to the wiring board material B, whereby chemical processing such as development and etching and chemical liquid processing are performed.

These will be described in detail. First, as shown in FIG. 1 (the conveyor 1 is not shown in FIG. 2), the conveyor 1 of the chemical solution processing apparatus includes a processing chamber 3 for a developing process or an etching process. In a (for example, a developing room or an etching room), the printed wiring board material B is transported linearly in a horizontal position. That is, the conveyor 1 is composed of a shaft 4 in which a large number of shafts 4 are horizontally arranged at a predetermined pitch in the front and rear transport directions H in parallel with the left and right width directions G, and the rollers 5 arranged on each of the shafts 4. Be prepared. And
Via a direction changing device 6 described later interposed in the middle,
The processing chambers 3 (for example, two developing chambers or etching chambers) are linearly disposed, and in each of the processing chambers 3, the shafts 4 and the rollers 5 are extremely thin and flexible. The printed wiring board material B is vertically opposed so as to sandwich the printed wiring board material B therebetween. Usually, the lower shaft 4 and the roller 5 are driven to rotate and function as a transport,
The upper shaft 4 and the roller 5 follow in a free state, and are generally used for holding the printed wiring board material B.
Functions as a meandering prevention. In addition, in view of such functions for carrying, holding, and preventing meandering, it is possible to use a wheel instead of the roller 5. Conveyor 1
Is like this.

Next, as shown in FIGS. 1 and 2, the spray nozzles 2 of the chemical liquid processing apparatus are printed in the transport direction H by the conveyor 1 in the front and rear processing chambers 3 respectively. A chemical solution E such as a developing solution or a corrosive solution is sprayed on the wiring board material B. That is, the spray nozzles 2 are arranged in a large number in the front and rear transport direction H and the left and right width direction G, and are also arranged vertically in the illustrated example, and thus are opposed to the printed wiring board material B from above and below. . In other words, a large number of spray nozzles 2 are arranged vertically at predetermined pitch intervals in the front, rear, left and right, over a wide area in the processing chamber 3 surrounded by the transport direction H and the width direction G perpendicular to the transport direction H. Have been. The chemical E, for example, a developer or a corrosive liquid, is stored in a liquid tank 7 below the processing chamber 3. And
The chemical solution E in the liquid tank 7 is pumped through the pump and the spray pipes 8 arranged in parallel along the transport direction H, and then from the spray nozzles 2 provided at predetermined pitch intervals in the spray pipes 8. In the example shown in the drawing, spraying is performed from above and below toward the printed wiring board material B transported by the conveyor 1.
Sprayed and spread. Then, the chemical solution E flows on the outer surface of the printed wiring board material B, that is, the circuit C forming surface, and then flows down to the lower liquid tank 7 again, is collected, and is circulated afterwards.
The spray nozzles 2 may be of a fixed type or a swing type. The spray nozzle 2 is like this.

The chemical processing apparatus such as the developing apparatus and the etching apparatus includes the above-described conveyor 1 and the spray nozzle 2, and further has the following characteristic configuration. That is, in this chemical solution treatment apparatus, the direction of the printed wiring board material B, which is the thin substrate to be conveyed, is changed along the conveyance surface at an angle other than 90 degrees along the conveyance surface. That is, as shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, etc., the direction changing device 6 is incorporated between the conveyors 1 of the front and rear processing chambers 3, and the direction changing device 6 The direction of the printed wiring board material B is changed along the horizontal plane, and the front and rear sides are changed to the left and right sides.
Turn left and right to the front and back.

The direction changing device 6 will be described in more detail.
As described above, in the two processing chambers 3 before and after,
Conveyor 1 for transporting printed wiring board material B in a horizontal position
A turn section 9 is provided between the two front and rear processing chambers 3, and a direction changing device 6 is incorporated therein. The direction changing device 6 conforms to each of the lower shafts 4 of the front and rear conveyors 1 and is disposed between the shafts 4.
Wheels 11 arranged at a predetermined pitch in the width direction G
(Note that the shaft 10 and the wheel 11 are not shown in FIG. 2), the next cylinder 12, the lower table 13, the vertical guide 14, the turntable shaft 15, the motor 16, the bevel gear 17, the turntable 18, the opening 19, Etc. are provided. Note that each lower shaft 4 and wheel 11
Are driven to rotate and function for conveyance.

More specifically, first, a cylinder 12 is erected from the floor of the turn section 9, and the lower table 13 is moved up and down while being guided by a vertical guide 14 based on the expansion and contraction of the cylinder 12. It is possible to move. A turntable shaft 15 is erected and fixed on the lower table 13. The turntable shaft 15 is provided with a bevel gear 17 on a motor 16 such as a reversing motor disposed on the lower table 13. Are connected via A turntable 18 is horizontally fixed to the upper end of the turntable shaft 15. The turntable 18 has a size suitable for the printed wiring board material B, and has a large number of openings 19 formed as a whole as shown in FIG.
The holes are drilled with a size and a pitch that can be freely inserted vertically, horizontally, or diagonally.

Then, in this direction changing device 6, the turntable 18 can be moved up and down via the lower table 13 and the turntable shaft 15 based on the expansion and contraction of the cylinder 12, as shown in FIG. Together with FIG.
As shown in FIG. 5, the bevel gear 1 is driven by the motor 16.
It is rotatable along a horizontal plane via the turntable 7 and the turntable shaft 15. When the turntable 18 is not operated, the turntable 18 is lowered to a height level below the upper end of each wheel 11 as indicated by a solid line in FIGS. On the other hand, during operation, first, the printed wiring board material B is once lifted. In other words, after the print is conveyed from the conveyor 1 of the processing chamber 3 on the front side onto the wheel 11 of the direction change device 6, the rotation of the shaft 10 and the wheel 11 is temporarily stopped, so that the print temporarily stopped. When the turntable 18 is lifted, the wiring board material B is moved to the position shown in FIG.
And once lifted as indicated by the imaginary line in FIG. Then, the turntable 18 is turned at an angle other than 90 degrees to change the direction of the printed wiring board material B being lifted. Thereafter, when the turntable 18 is lowered, the printed wiring board material B is mounted on each wheel 11 again. Further, as shown by the solid line in FIGS. It descends to the operating position and stops. Then again shaft 1
The printed wiring board material B is transported to the conveyor 1 of the processing chamber 3 on the rear side by rotating the wheel 0 and the wheel 11. Thus, the turntable 18 is, for example, 3
Can be rotated 60 degrees and at least one of them is 9
The printed wiring board material B is turned at a predetermined angle other than 0 degrees or reciprocally oscillated at a predetermined angle other than 90 degrees.

The direction change device 6 is constituted by such a turntable 18 and the like, and the conveyor 1 of the front and rear processing chambers 3 (for example, the front and rear developing chambers or the front and rear etching chambers).
In between, it is built. Then, the direction of the printed wiring board material B during the transfer is changed along the horizontal plane, so that chemical processing such as development and etching in the front processing chamber 3 is continued in the rear processing chamber 3. .

Here, the turning angle by the turning device 6 of the chemical processing apparatus will be described. The direction changing device 6 converts the printed wiring board material B being transported to 9
The direction is changed at an angle other than 0 degrees, so that the printed wiring board material B is turned to the left and right sides in the preceding and succeeding examples, and at the same time, the left and right sides are turned to the front and rear sides. Various patterns are conceivable for setting the direction change angle. First, a pattern that is set at an angle of about 90 degrees, such as 80 degrees or 100 degrees, is possible. Next, a pattern in which the angle is set to 30 degrees, 45 degrees, 60 degrees, or the like is also possible. Furthermore, 1
A pattern set at an angle of 20 degrees, 135 degrees, 160 degrees, or the like is also conceivable. By the way, irrespective of such an accurate angle setting, a pattern in which a rough angle width having a certain width (for example, in a range of 1 to 5 degrees) can be used. It is to be noted that a pattern in which the angle is not fixed and is variable in accordance with information on the printed wiring board material B, the circuit C, and the like is also possible.

Considering the reason for setting the turning angle, first, a. Regarding the circuit C formed on the outer surface of the printed wiring board material B (printed wiring board A), in correspondence with the angle (not set to 90 degrees) between the vertical one and the horizontal one, A pattern for setting the angle is conceivable. B. On the upstream side of the processing chamber 3 on the front side, when the printed wiring board material B is started to be conveyed by the conveyor 1, the vertical and horizontal circuit directions C, the front and rear conveyance directions H and the left and right width directions G
In this case, a pattern for setting an angle in accordance with the deviation is considered.

As described above, the setting of the direction changing angle of the printed wiring board material B by the direction changing device 6 may be a pattern a or b. Therefore, regarding the orientation of the printed wiring board material B before and after the change of direction, various patterns are possible from a pattern in which the front and rear sides are slightly directed to the left and right sides to a pattern which is directed substantially to the left and right sides. Become. That is, various patterns are possible, from a pattern in which the left and right sides up to that point are slightly directed to the front and rear sides, to a pattern in which the left and right sides are directed substantially to the front and rear sides. The direction changing angle of the direction changing device 6 of the chemical solution processing device is as described above.

The present invention is configured as described above. Then, it becomes as follows. This chemical treatment system
Conveyor 1 used in the manufacturing process of printed wiring board A
A chemical solution E such as a developing solution or a corrosive solution is sprayed from a large number of spray nozzles 2 disposed opposite to each other on a printed wiring board material B which is conveyed in a horizontal posture and a circuit C is formed on the outer surface thereof. Chemical processing such as development and etching is performed. And in this chemical solution processing device,
The second and third are as follows.

First, in a chemical processing apparatus such as a developing apparatus or an etching apparatus, a direction changing device 6 is incorporated between the conveyors 1 so that a printed wiring board material B
Is turned on the horizontal plane in the middle of the direction (see FIG. 1, FIG. 2, FIG. 3, FIG. 4, etc.). The printed wiring board material B has a longitudinal direction (substantially longitudinal direction in the drawing) and a lateral direction (substantially short direction in the drawing, that is, the longitudinal direction).
Circuit C in different directions in the horizontal plane with respect to the vertical direction)
Are often formed. The distance between the vertical circuit C and the horizontal circuit C is exactly 90 as shown in the figure.
It is not set to degrees, for example, making a larger angle,
In many cases, the angle is set to a smaller angle or a substantially broken line. The injected chemical E is
It is easy to flow through each inter-circuit space D, and a speed difference is generated in the chemical treatment by the vertical and horizontal directions of the circuit C as it is. The adverse effect of the difference is eliminated, and the chemical treatment becomes uniform over the vertical and horizontal circuits C. That is, if the direction is not changed in the middle in this way, for example, when the vertical direction of the circuit C is set to the front and rear transport directions H, the chemical processing speed of the vertical circuit C increases, and conversely, The chemical processing speed of the circuit C in the lateral direction on the same outer surface or the opposite surface is reduced, and the uniformity of the chemical processing is impaired.
First, the chemical treatment is made uniform.

Second, in the chemical processing apparatus, these can be realized reliably and easily. That is, a. The circuit C formed vertically and horizontally on the outer surface of the printed wiring board material B (printed wiring board A) does not intersect at exactly 90 degrees as shown in FIG. 5, but intersects at an angle larger than 90 degrees or at a small angle. Often have. b. When the printed wiring board material B is started to be conveyed by the conveyor 1 of the front processing chamber 3 of the front and rear two processing chambers 3, the vertical and horizontal circuit C directions are set to the front and rear transfer directions H and the left and right width directions. In many cases, positioning and setting do not match with G. As a typical example, a case where the longitudinal direction and the longitudinal direction of the printed wiring board material B do not coincide with the transport direction H, and are set to be shifted left and right. c. It is not easy to turn the printed wiring board material B exactly 90 degrees in the direction changing device 6 between the processing chambers 3. That is, it is easier to control the operation of the printed wiring board material B such as lifting, turning, and descent by the direction changing device 6 at an angle other than 90 degrees. Due to these, in this chemical treatment device,
The direction changing device 6 changes the direction of the printed wiring board material B at an angle other than 90 degrees, so that the first point described above can be realized reliably and easily. That is,
The direction changing device 6 of this chemical solution processing device has a large number of wheels 11 disposed in front, rear, left and right, and a large number of openings 19 corresponding to each wheel 11, and is capable of moving up and down and rotating at an angle other than 90 degrees. And the turntable 18 in combination, so that the printed wiring board material B is
The direction is changed at angles other than degrees. The specific rotation angle of the turntable 18 excluding 90 degrees is the angle between the vertical and horizontal circuits C of a described above, or the vertical and horizontal circuit C directions of b and the transport direction H and the width direction G. The angle is set according to the shift.

Third, in the chemical processing apparatus such as the developing apparatus and the etching apparatus, the chemical treatment of the printed wiring board material B is made uniform as described in the first aspect, and the chemical processing apparatus is used as in the second aspect. This is achieved reliably and easily. As described above, in the manufacturing process of the printed wiring board A, chemical treatments such as development and etching and chemical liquid treatments are made uniform, and for the printed wiring board material B, a delay or shortage of the chemical treatment or an excessive or excessive chemical treatment. No spots occur. First, the circuit width F of the circuit C to be formed
(See FIG. 6), but is entirely uniform. In other words, a situation where a wide portion or a narrow portion of the circuit width F occurs is avoided. Further, mainly due to the elimination of over / excessive chemical treatment, the cross-sectional shape of the formed circuit C is about 80% when the ideal circuit width F is 100%, which is a square or rectangle, that is, a vertical shape. A convex shape is obtained (see FIG. 6 (2)). In other words, a trapezoidal or substantially Mt. Fuji cross-sectional shape with a circuit width F of about 55% of the ideal (see FIG. 6 (3)) is avoided.

In the illustrated example, the turn section 9
The direction changing device 6 is disposed in the air, not in the liquid such as the chemical solution E, so that the direction of the printed wiring board material B conveyed is changed in the air, but the present invention is not limited to this. It is not something to be done. That is, regardless of the illustrated example, the turn section 9 and the direction changing device 6 are
The present invention is also applicable to an example in which the printed wiring board material B that is disposed in a medium or other liquid and conveyed in the liquid is turned in the liquid. . In this case, the printed wiring board material B is conveyed in the liquid such as the chemical solution E also in the processing chamber 3, and the chemical liquid E is sprayed on the conveyed printed wiring board material B in such a chemical liquid E. Often.

[0035]

As described above, the chemical processing apparatus such as the developing apparatus and the etching apparatus according to the present invention can change the direction of the printed wiring board material conveyed by the direction changing apparatus provided with a predetermined turntable or the like. By changing the direction at an angle other than 90 degrees on the way, the following effects are exhibited.

First, in this chemical processing apparatus, the direction of the printed wiring board material conveyed is changed midway. In printed wiring boards (materials), circuits are often formed in the vertical or horizontal direction of the outer surface, and a chemical such as a developing solution or a corrosive solution sprayed onto the outer surface of the printed wiring board material. It easily flows through the space between the circuits, and as it is, a speed difference easily occurs in chemical processing such as development and etching depending on the vertical and horizontal directions of the circuit. Therefore, by changing the direction of the printed wiring board material on the way, the adverse effects of the circuit direction and the speed difference are eliminated, and the chemical treatment such as development and etching is made uniform in the circuit in both the vertical and horizontal directions. That is, as in the above-described conventional example in which the direction of the printed wiring board material is not changed midway, for example, when the vertical direction is set to the front and rear transport directions, the chemical processing of the vertical circuit becomes too fast in terms of speed. It is possible to reliably avoid a situation in which the chemical processing of the horizontal circuit is over or excessive, and the chemical processing of the horizontal circuit is delayed or insufficient, and the uniformity of the chemical processing is impaired.

Second, this is realized reliably and easily in this chemical processing apparatus. That is, a. Circuits formed on the outer surface of a printed wiring board (material) in the vertical and horizontal directions are often not exactly 90 degrees orthogonal to each other. b. When a printed wiring board material is started to be conveyed by a conveyor, it is often positioned without accurately matching the vertical and horizontal circuit directions with the front and rear conveyance directions and the left and right width directions, which is easier to control.
c. It is not easy to accurately change the direction of the printed wiring board material by 90 degrees during conveyance, and it is easier to control the direction by changing the direction at an angle other than 90 degrees. Therefore,
In the direction changing device incorporated in this chemical solution processing device, the waste aiming at the direction change of 90 degrees is eliminated.
By changing the direction except for 90 degrees between about 0 degrees and about 100 degrees, the configuration of the control mechanism and the like is simplified, and the operation is also facilitated. That is, this direction changing device has a configuration in which a wheel and a turntable with an opening are employed in combination, and the turntable turns the printed wiring board material at an angle other than 90 degrees.

Third, in this chemical treatment apparatus, firstly, the chemical treatment such as development and etching of the printed wiring board material is made uniform, and secondly, it can be performed reliably and simply. Is achieved. Therefore, in the manufacturing process of the printed wiring board, the circuit to be formed has a uniform circuit width even if the circuit has a fine circuit width, and the cross-sectional shape is square or rectangular, that is, vertical. A convex shape is obtained, and for example, overheating during energization is prevented and safety is improved. As in the above-mentioned conventional example, the uniformity of the chemical treatment is impaired, and unevenness and unevenness and the occurrence of excess or deficient portions are prevented. And the occurrence of loss of the circuit and the like are reliably avoided.

The printed wiring board includes CSP and PBGA related to a semiconductor chip, and has a finer circuit, higher precision,
The progress of densification has been remarkable, and thus the chemical processing apparatus of the present invention has a uniform circuit width even with a fine circuit width and an ideal cross-sectional shape. The significance of being able to make large changes is significant. For example, according to the chemical treatment device of the present invention,
A printed wiring board for a circuit having a circuit width of 20 μ and a space between circuits of about 30 μ can be easily manufactured. Nowadays,
In response to the miniaturization, fineness, and multi-layering of printed wiring boards, the thickness of copper foil for circuit formation has also become extremely thin. Is easily lost, and from this point of view,
The significance of the chemical solution treatment device of the present invention is particularly large. Furthermore, as a means for responding to the miniaturization, high precision, and high density of circuits, there has hitherto been only an electroplating method which requires a very complicated process and is extremely costly. According to the processing apparatus, it is possible to cope with miniaturization, higher precision and higher density of the circuit of the printed wiring board based on the conventional exposure, development and etching methods which are extremely excellent in cost. As described above, the effects exhibited by the present invention are remarkable and large, for example, all the problems existing in this type of conventional example are solved.

[Brief description of the drawings]

FIG. 1 is a side view for explaining an embodiment of a chemical solution treatment device according to the present invention.

FIG. 2 is an explanatory plan view for explaining the embodiment of the present invention;

FIG. 3 is an explanatory side view of a direction change device and the like for explaining the embodiment of the present invention.

FIG. 4 is an explanatory plan view of a direction changing device and the like for explaining the embodiment of the present invention;

5 is an explanatory plan view for explaining a printed wiring board (material). FIG. 5A is an example in which a circuit is formed in a longitudinal direction, and FIG. 5B is a plan view in which a circuit is formed in a lateral direction. Example
(3) The figure shows an example in which the circuit is formed in the longitudinal direction and the lateral direction.

FIG. 6 is a sectional view of a printed wiring board (material);
(1) The diagram is provided for explanation of circuits and spaces between circuits, etc.
FIG. 2B shows an example of a good circuit, and FIG. 3C shows an example of a bad circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor 2 Spray nozzle 3 Processing chamber 4 Shaft 5 Roller 6 Direction change device 7 Liquid tank 8 Spray pipe 9 Turn section 10 Shaft 11 Wheel 12 Cylinder 13 Lower table 14 Vertical guide 15 Turntable shaft 16 Motor 17 Bevel gear 18 Turntable 19 Opening 20 Conveyor frame A Printed wiring board B Printed wiring board material C Circuit D Inter-circuit space E Chemical liquid F Circuit width G Width direction H Transport direction

Claims (1)

(57) [Claims] 1. A chemical liquid processing apparatus which is used in a manufacturing process of a printed wiring board and in which a chemical solution is sprayed on a printed wiring board material to be conveyed to perform a chemical treatment. The chemical solution is transported in a posture, and the chemical solution is sprayed from a number of spray nozzles disposed opposite to the printed wiring board material to be transported, and a direction change device is incorporated between the front and rear conveyors, The turning device changes the direction of the printed wiring board material to be conveyed at an angle other than 90 degrees along a horizontal plane, and turns the front and rear sides to the left and right sides, and also turns the left and right sides to the front and rear sides. The printed wiring board material may not be set at 90 degrees orthogonally between circuits formed on the outer surface of the printed circuit board vertically or horizontally, or the printed circuit board material may be changed by the conveyor. Transporting is performed in such a manner that the vertical and horizontal circuit directions are not exactly aligned with the forward and backward transport directions and the left and right width directions. A plurality of wheels arranged at a predetermined pitch and capable of carrying the printed wiring board material thereon, and having a size suitable for the printed wiring board material, and freely inserting each wheel in a vertical, horizontal, or oblique direction. A turntable having a plurality of openings formed therethrough with possible dimensions and pitches, the turntable being able to rise and fall above and below a height level at the upper end of each of the wheels. The printed wiring board material can be lifted and rotated at an angle other than 90 degrees, so that the printed wiring board material can be turned at an angle other than 90 degrees. The specific rotation angle of the printed wiring board material excluding 90 degrees, that is, the specific turning angle of the printed wiring board material excluding 90 degrees, is between the circuits formed vertically and horizontally on the printed wiring board material. A chemical liquid processing apparatus, wherein the angle is set in accordance with an angle to be formed or a deviation between the circuit direction in the vertical and horizontal directions and the transport direction in the front-rear direction or the width direction in the left-right direction.