KR20120065777A - Oscillation and shocking apparatus of pcb - Google Patents

Abstract

PURPOSE: A device for oscillating and shocking a printed circuit board is provided to ensure application to a printed circuit board with a high aspect ratio and obtain desired results of desmear and electroless copper plating processes. CONSTITUTION: A device for oscillating and shocking a printed circuit board comprises a tank(10), a support frame(30), an upper frame(20), an oscillation motor(40), a shocking vibrator, and a controller. The upper frame is located in the tank and coupled with a rack. The oscillation motor provides oscillation to the upper frame. The shocking vibrator provides shocking to the upper frame. The controller commands random motions to the oscillation motor and the shocking vibrator.

Description

OSCILLATION AND SHOCKING APPARATUS OF PCB}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a printed circuit board oscillation and shocking apparatus, and to a printed circuit board oscillation and shocking apparatus applicable to a printed circuit board having a high aspect ratio.

The copper plating process, which is performed when manufacturing a printed circuit board, is a process performed to provide solderability to conductive interlayer conduction or holes separated by an insulating layer. Such copper plating processes include a deburring process, a desmear process, an electroless copper plating process or a chemical copper process, an electrophoretic process, and a belt sanding process.

When the copper plating process is performed, the thickness of the printed circuit board becomes thicker and the hole size decreases, that is, as the aspect ratio increases, the phenomenon of copper plating decreases. Here, the aspect ratio is defined as the aspect ratio = h / D when the thickness of the printed circuit board is h and the diameter of the hole is D. The steps performed to prevent the reliability deterioration of the copper plating process are the desmear process and the electroless copper plating process, which are one of the small steps of the copper plating process.

The desmear process is a process for removing the smear of resin generated during the CNC drill process with a chemical agent and allowing a smooth connection between the inner layer circuit and the outer layer circuit, and the electroless copper plating process is a hole inner wall and a product surface. Chemical copper plating is applied to the catalyst to bond copper which provides conductivity to the inner wall of the hole.

In the case of such a desmear process and an electroless copper plating process, it is most essential to induce a contact between the hole inner wall formed by drilling on a printed circuit board and a predetermined solution reacting with the hole inner wall.

However, the equipment used in the desmear and electroless copper plating process of the conventional printed circuit board, when applied to the printed circuit board having such a high aspect ratio, the desired performance, that is, the predetermined process to the inner wall of the hole of the printed circuit board There was a problem that the solution did not contact well.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printed circuit board oscillation and shocking device which can be applied to a printed circuit board having a high aspect ratio.

In order to achieve the above object, the printed circuit board oscillation and shocking device according to the present invention is a printed circuit board oscillation and shocking device for causing a rack coupled to the printed circuit board to move in a predetermined processing solution, A tank 10 containing the treatment solution; A support frame (30) for supporting the tank (10); An upper frame 20 positioned above the tank 10 and coupled to the rack; An oscillation motor 40 for providing an oscillation operation to the upper frame 20; A shocking vibrator (90) for providing a shocking operation to the upper frame (20); And a controller for instructing the oscillation motor 40 and the shocking vibrator 90 to perform a random operation.

In addition, as the oscillation motor 40 rotates, the upper frame 20 is provided with a linear reciprocating motion having a horizontal and constant angle θ.

In addition, the first rotating plate 80 that rotates in accordance with the rotation of the oscillation motor 40; A connection bar 75 formed on an eccentric position away from the center of the first rotating plate; A second rotating plate 70 connected to the connection bar and rotating; And a first transmission part 60 surrounding the second rotation plate and transmitting rotational force to the upper frame.

In addition, a plurality of rollers installed in the support frame 30; And a plurality of triangular protrusions installed on a lower surface of the upper frame 20 and transmitting linearly reciprocating motion to the upper frame 20 by performing linear reciprocating motions having a predetermined angle θ, in rotational contact with each of the rollers. It is preferable to further include;

Meanwhile, the plate 100 on which the shocking vibrator 90 is seated; And a second transmission unit 110 which is installed at one side of the plate and receives the vertical motion of the shocking vibrator 90 and transmits it to the rack.

In addition, the second transmission unit 110 has a "ㅗ" shape, and holes are formed in the left and right wings of the "ㅗ", respectively, and are inserted into each of the holes of the second transmission unit 110. Preferably, the first guide rod 115 and the second guide rod 116 are formed on the plate 100 to guide the second transfer part 110 to vertically slide.

In addition, the second transfer unit 110 may be vertically moved by a pneumatic cylinder.

In addition, the control unit preferably operates the shocking vibrator 90 only when the second transfer unit 110 is seated on the plate 100.

In addition, the horizontal bar 120 is coupled to the second transfer unit 110, and installed in a direction crossing the tank (10); And vertical bars 130 and 140 coupled to the horizontal bar 120 and installed in the direction of the tank 10 to support the rack.

Therefore, in the case of the printed circuit board oscillation and shocking apparatus according to the present invention, even if it is applicable to a printed circuit board having a high aspect ratio, the desired desmear process and the electroless copper plating process result can be obtained.

1 is a front view of a printed circuit board oscillation and shocking device according to the present invention.
Figure 2 is a linear reciprocating motion having a horizontal and constant angle (θ) while sliding the upper frame 20 of the printed circuit board oscillation and shocking device according to the invention with respect to the plurality of rollers (50, 51, 52) A diagram for explaining the oscillation operation
3A is a diagram illustrating an upper frame 20 of a printed circuit board oscillation and shocking device according to the present invention.
3B is a cross-sectional view of a portion A of the upper frame 20 as well as a lower structure thereof when cut along the line BB ′ in FIG. 3A.
3C is a view for explaining a structure in which the oscillation 40 provides a rotational motion to the second rotating plate 70 of FIG. 3B.
4 is a view for explaining the vertical motion, that is, the shocking operation of the printed circuit board oscillation and shocking device according to the present invention.
5 is an embodiment of a printed circuit board oscillation and shocking device according to the present invention, a photograph showing a state in which the upper frame 20 is linear reciprocating motion having a constant angle (θ) in accordance with the rotation of the roller 50 to be.
FIG. 6 is a photograph showing an example of providing a shocking operation to the upper frame 20 according to a random vertical movement of the shocking vibrator 90 as an embodiment of the printed circuit board oscillation and shocking apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a front view of a printed circuit board oscillation and shocking device according to the present invention, Figure 2 is a top frame 20 of the printed circuit board oscillation and shocking device according to the invention a plurality of rollers (50, 51 and 52 are diagrams for explaining an oscillation operation of linear reciprocating motion having a horizontal and constant angle θ while being slid with respect to FIGS. FIG. 3B is a view showing a cross-sectional view of a portion A of the upper frame 20 as well as a lower structure thereof when cut along the line BB ′ in FIG. 3A, and FIG. 3C is an oscillation ( 40 is a view for explaining a structure for providing a rotational motion to the second rotating plate 70 of Figure 3b, Figure 4 illustrates a vertical motion, that is, shocking operation of the printed circuit board oscillation and shocking device according to the present invention Ha 5 is an embodiment of a printed circuit board oscillation and shocking device according to the present invention, the upper frame 20 is a linear reciprocating motion having a constant angle (θ) in accordance with the rotation of the roller 50 6 is a view showing an embodiment of the printed circuit board oscillation and shocking device according to the present invention, and provides a shocking operation to the upper frame 20 according to a random vertical movement of the shocking vibrator 90. This is a picture showing.

The printed circuit board oscillation and shocking device according to the present invention is a device that makes the rack combined with the printed circuit board to have a horizontal motion and a vertical motion in a predetermined treatment solution. As described above, the copper plating process performed when manufacturing a printed circuit board is a process performed to provide solderability to conductor interlayer conduction or holes separated by an insulating layer, and such copper plating process is deburring. It consists of a process, a desmear process, a copper plating process (chemical copper process, an electrophoresis process), and a belt sanding process. Among them, the oscillation and shocking apparatus of the printed circuit board of the present invention is a device that can be applied to the desmear process and the copper plating process.

Looking at the desmear process in more detail, the desmear process is a process for removing a smear of resin generated during a CNC drill process with a chemical agent to have a smooth connection between an inner layer circuit and an outer layer circuit.

The desmear process uses a sweller step to inflate the smear (epoxy) on the inner wall of the hole during CNC drilling to improve the etching power, to remove chemicals on the substrate by using a dip method, and to move to the next tank. Hot water, water washing step to prevent mixing, smear attached to the conductor and non-conductor part of the inner wall of the hole is removed to form a conductor with PTH plating of the inner layer circuit during chemical electroplating and gives roughness of the inner wall of the PTH plating Promoter step to improve the temperature, remove the chemicals on the substrate using the dip method and remove the residue of manganese remaining on the inner wall of the hole treated by the hot water washing, washing step, and promoter process to prevent chemicals from entering the next tank And cleaning for the purpose of neutralizing the substrate, using a dip method to remove chemicals on the substrate and to prevent chemicals from entering the next tank. In order to remove the water in the substrate surface and holes by blowing hot water, water washing step, hot air for the order is made in order.

Looking at the copper plating process, the copper plating process removes fingerprints and organic matter on the surface of the product, and the degreasing step of adsorbing ions in the hole to facilitate the adhesion of catalyst, followed by hot water washing, washing with water, and oxide on the surface of the product. An etching step of removing and giving surface roughness to improve the adhesion of the plating, and then a pre-dip step of protecting the sodium hydroxide solution and removing the fine oxide film as a washing, pickling, washing, and catalyst pretreatment; A catalyst treatment step of attaching a catalyst (Pd / Sn) to the inner wall of the hole for chemical copper plating; Then the washing step; An accelerator step that removes the deposited tin (Sn) in the catalyst treatment step to improve plating adhesion, followed by a washing step, a copper copper chemically plated on the inner wall of the hole and a catalyst on the surface of the product to give conductivity to the inner wall of the hole. The chemical copper plating step of attaching the film, followed by water washing, pickling, and water washing step, lactic acid copper plating step of electroplating copper copper plated inner wall and surface to make stable circuit thickness, then two-stage washing, and rust-treating the substrate It consists of a rust prevention treatment step, water washing and drying step to prevent oxidation of the substrate during or after drying.

Thus, the oscillation and shocking apparatus of the printed circuit board of the present invention which is a device that can be applied to the desmear process and the copper plating process, the tank 10; Support frame 30; Upper frame 20; An oscillation motor 40; Shocking vibrator 90; And a controller (not shown).

Here, the tank 10 contains a predetermined treatment solution. As described above, a predetermined treatment solution for carrying out the desmear process and the chemical copper plating process is accommodated.

Next, as shown in Figure 1, the support frame 30 is a structure for supporting the tank 10, it can be designed in various forms, of course.

Next, the upper frame 20 is located above the tank 10 and coupled with the rack. The upper frame 20 is provided with an oscillation operation according to the rotation of the oscillation motor 40 so that the upper frame 20 is well supplied to a predetermined treatment solution into the hole of the printed circuit board contained in the tank 10. Oscillation motion here refers to a horizontal reciprocating motion.

As shown in FIG. 3C, the first rotating plate 80 rotates according to the rotation of the oscillation motor 40, and the rotational force is transmitted to the second rotating plate 70. However, the connecting bar 75 connecting the second rotating plate 70 and the first rotating plate 80 to each other is coupled to the center of the second rotating plate 70, but deviates from the center C of the first rotating plate 80. It is formed on an eccentric position. Through this structure, a horizontal linear reciprocating motion is generated according to the operation of the oscillation motor 40.

As shown in FIG. 3B, since the first transmission part 60 surrounds the second rotation plate 70, the rotation force is transmitted to the upper frame 20. Here, although the 1st transmission part 60 and the 2nd rotating plate are demonstrated as another structure, it is also possible to manufacture this integrally.

As illustrated in FIG. 2, a plurality of triangular protrusions are formed on the lower surface of the upper frame 20 for performing such a horizontal linear reciprocating motion, and a plurality of rollers 50, 51, and 52 are provided through the triangular protrusions. ) And linearly reciprocating motion with a constant angle (θ) in rotational contact with each. In this case, the angle of one side of the triangular protrusion should also be θ.

Usually, it is preferable that the constant angle (theta) here is 15 degrees. The reason is that the air inside the air is not properly discharged at an angle of 15 degrees or less, which may cause air void defects, and copper plating thickness deviations of the upper and lower substrates may occur at an angle of 15 degrees or more.

In addition, the linear reciprocating motion is preferably performed for 40 seconds at 12, 16 and 17 speeds per minute. The reason is the smallest difference between the surface copper plating thickness and the hole copper plating thickness at 12, 16 and 17 revolutions per minute, and in random order of 12, 16 and 17 revolutions per minute rather than working with one revolution. This is because exercise produces a greater effect (minimization of the difference between the surface copper plating thickness and the hole copper plating thickness).

Next, the shocking vibrator 90 provides a shocking operation to the upper frame 20 according to the vertical random movement.

In more detail with regard to providing the shocking action, the shocking vibrator 90 is seated on the plate 100 as shown in FIG. 4, and the second transfer unit 110 is further provided with the plate 100. Is installed on one side of the, when the shocking vibrator 90 is a random vertical movement, the plate 100, the second transfer unit 110, the horizontal bar 120 to be described later, vertical bars (130, 140) By the way, it is delivered to the rack supporting the printed circuit board.

In addition, as shown in FIG. 4, the second transfer unit 110 has a “ㅗ” shape, and holes are formed in the left and right wing portions of the “ㅗ” shape, respectively. The plate 100 is provided with a first guide rod 115 and a second guide rod 116 for guiding the second transfer unit 110 to vertically slide in each of the holes of the second transfer unit 110. Is formed on the phase. Although not shown in FIG. 4, in the first guide rod 115 and the second guide rod 116, a dropping prevention jaw is formed to prevent the second transfer unit 110 from being separated from each or any one end thereof. It is preferable to be. The second transmission unit 110 may be vertically moved by a pneumatic or hydraulic cylinder or the like.

Next, the control unit (not shown) instructs the oscillation motor 40 and the shocking vibrator 90 to perform a random operation so that such an operation is performed. The controller may be implemented as, for example, a program logic control (PLC).

In addition, the control unit preferably operates the shocking vibrator 90 only when the second transfer unit 110 is seated on the plate 100. In other words, the second transfer part 110 is separated from the plate 100 without being seated on the plate 100 by a pneumatic cylinder so as to be positioned between the first guide rod 115 and the second guide rod 116. In this case, the shocking vibrator 90 may not be operated. In this case, since the random vertical motion of the shocking vibrator 90 is not transmitted to the second transmission unit 110 well, it is not necessary to operate it.

As shown in FIG. 4, a horizontal bar 120 coupled to the second transfer unit 110 and installed in a direction crossing the tank 10; And vertical bars 130 and 140 coupled to the horizontal bar 120 and installed in the direction of the tank 10 and supporting the rack, such that the shocking vibrator 90 is mounted on the rack supporting the printed circuit board. Ideal for transmission of random vertical movements. However, since such a configuration is an example, other changes are possible.

5 is an embodiment of the printed circuit board oscillation and shocking apparatus according to the present invention, the linear reciprocating motion of the upper frame 20 having a constant angle (θ) according to the rotation of the roller 50, that is, the oscillation operation It is shown. FIG. 6 is a photograph showing an example of providing a shocking operation to the upper frame 20 according to a random vertical movement of the shocking vibrator 90 as an embodiment of the printed circuit board oscillation and shocking device according to the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various modifications and changes may be made without departing from the scope of the appended claims.

10 tank
20 upper frame
30 support frame
40 oscillation motors
50, 51, 52 multiple rollers
60 first delivery unit
70 second turn plate
75 connecting bar
80 1st turn plate
90 Shocking Vibrator
100 plates
110 second delivery unit
115 1st guide bar
116 2nd guide bar
120 horizontal bar (120)
130, 140 vertical bar

Claims (9)

In a printed circuit board oscillation and shocking device for causing a rack coupled to a printed circuit board to move in a predetermined treatment solution,
A tank 10 containing a predetermined treatment solution;
A support frame (30) for supporting the tank (10);
An upper frame 20 positioned above the tank 10 and coupled to the rack;
An oscillation motor 40 for providing an oscillation operation to the upper frame 20;
A shocking vibrator (90) for providing a shocking operation to the upper frame (20); And
And a control unit for instructing the oscillation motor (40) and the shocking vibrator (90) to perform a random operation. The method of claim 1,
Printed circuit board oscillation and shocking device, characterized in that for providing a linear reciprocating motion having a horizontal and constant angle (θ) to the upper frame (20) in accordance with the rotation of the oscillation motor (40). The method of claim 2,
A first rotating plate 80 rotating according to the rotation of the oscillation motor 40;
A connection bar 75 formed on an eccentric position away from the center of the first rotating plate;
A second rotating plate 70 connected to the connection bar and rotating; And
A printed circuit board oscillation and shock absorbing device, characterized in that it further comprises a first transfer unit (60) surrounding the second rotating plate and transmitting rotational force to the upper frame. The method of claim 3, wherein
A plurality of rollers installed on the support frame 30; And
A plurality of triangular protrusions installed on a lower surface of the upper frame 20 and transmitting linearly reciprocating motion to the upper frame 20 by performing linear reciprocating motions having a predetermined angle θ in rotational contact with each of the rollers; Printed circuit board oscillation and shocking device comprising a further. The method of claim 1,
A plate 100 on which the shocking vibrator 90 is seated; And
The printed circuit board oscillation and shock absorbing apparatus further comprises a; is provided on one side of the plate, the second transmission unit (110) for receiving the vertical movement of the shocking vibrator (90) and transmits it to the rack. The method of claim 5, wherein
The second delivery unit 110 has a "ㅗ" shape, holes are formed in the left and right wings of the "ㅗ", respectively,
The plate 100 includes a first guide rod 115 and a second guide rod 116 inserted into each of the holes of the second transfer unit 110 to guide the second transfer unit 110 to vertically slide. A printed circuit board oscillation and shocking device, characterized in that formed on the). The method according to claim 6,
The second transmission unit (110), characterized in that the vertical movement by the pneumatic cylinder, the printed circuit board oscillation and shocking device. The method of claim 7, wherein
The control unit, the printed circuit board oscillation and shocking device, characterized in that for operating the shocking vibrator (90) only when the second transfer unit (110) is seated on the plate (100). The method according to claim 6,
A horizontal bar 120 coupled to the second transfer unit 110 and installed in a direction crossing the tank 10; And
Coupled with the horizontal bar (120) and installed in the direction of the tank (10), characterized in that it comprises a vertical bar (130, 140) for supporting the rack, printed circuit board oscillation and shocking device.

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