KR200410309Y1 - Apparatus for cleaning the lead frame automatically - Google Patents

Abstract

The automatic cleaning apparatus of the disclosed lead frame includes a plurality of circular bars having spaced portions formed at predetermined intervals to convey the lead frames taken out from the press, and the plurality of circular bars are conveying parts including a conveyor belt connected by ring coupling. Wow; An ultrasonic cleaner for immersing the lead frame in the cleaning solvent and generating ultrasonic waves to remove foreign substances attached to the lead frame; A water cleaning tank for cleaning the lead frame passed through the ultrasonic cleaning unit; A pickling tank for forming roughness on the surface of the lead frame passing through the water cleaning tank; A pure shower bath for removing acid components remaining in the lead frame after the pickling tank; And a drying unit for evaporating moisture included in the lead frame. According to the automatic cleaning device of such a lead frame, all products of the lead frame which are continuously cleaned can be uniformly cleaned and dried, and the defects can be reduced by preventing factors such as impact and change due to the manual process.

Leadframe, Cleaning, Conveyor Belt

Description

Apparatus for cleaning the lead frame automatically}

1 is a view showing an automatic cleaning device of a lead frame according to an embodiment of the present invention,

2 is a plan view showing the cleaning device shown in FIG.

3 is a view illustrating a method of cleaning a lead frame passing through the water cleaning bath shown in FIG.

4 is a view schematically showing an air knife according to an example of the present invention;

5 is a view showing the direction of the upper and lower nozzles shown in FIG.

6 is a view showing the shape of the inet belt according to an embodiment of the present invention.

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

100 ... conveying section 110 ... inet belt

111 ... round bar 112 ... space section

120 ... Autostacker 130 ... Splitter

200 ... ultrasonic cleaner 210 ... upper tank

211,212,213 ... Cleaning tank 220 ... Lower tank

230 ... circulation pump 240 ... oil separator

300 ... water cleaning tank 310a, 310b, 310c ... storage tank

320a, 320b, 320c ... supply tanks 330a, 330b, 330c ... pumps

400 ... pickling bath 500 ... pure shower bath

600 ... drying part 610 ... compression rolling part

620 ... air knife 621,622 ... upper and lower nozzles

630 ... drying furnace

The present invention relates to a cleaning apparatus for a lead frame, and more particularly to an automatic cleaning apparatus for a lead frame for removing foreign matter attached to the lead frame.

In general, a lead frame (L / F) serves to support semiconductor devices as an independent component as a medium for transmitting a function of a semiconductor device (IC chip) to an external circuit.

Such a lead frame typically includes a pad portion on which an IC chip is seated, an inner lead that is wire-bonded with the IC chip, and an outer lead connected to the inner lead and connected to an external circuit. It is constructed.

The manufacture of the lead frame configured as described above can be largely classified into a stamping method and an etching method.

The etching method is a chemical corrosion method by etching, and is suitable for manufacturing a lead frame having a fine lead pattern.

The stamping method is to produce a product having a predetermined shape by punching while sequentially transferring materials by a sequential transfer press die apparatus, and is mainly used for mass production of a lead frame having a small number of leads.

On the other hand, the stamping method has a visual inspection to check the punching state, deformation, etc. in the manufacturing process, and after the operator inserts the lead frame into the basket as a means for transferring the product to the cleaning process, the next process, the basket The method of injecting directly into the washing facility has been mainly used.

However, according to the method as described above, since a cleaning process was performed by loading a predetermined amount of lead frames in a basket of a predetermined size, a problem arises in that the worker's labor is excessively increased. During loading, changes in the appearance of the leadframe and contamination occurred frequently by the operator.

In addition, there is a problem that the lead frame loaded on the basket is not uniformly cleaned and evenly dried in the drying process.

The present invention has been created to solve the above problems, it can automatically clean the lead frame to reduce the number of work, obtain a uniform cleaning effect and drying effect, and to prevent contamination and deformation of the lead frame by the operator It is an object of the present invention to provide an automatic cleaning device for a lead frame that can be prevented.

Other objects and advantages of the present invention will be described below and will be appreciated by the embodiments of the present invention. In addition, the objects and advantages of the present invention can be realized by means and combinations shown in the utility model registration claims.

In order to achieve the above object, an automatic cleaning apparatus for a lead frame includes a plurality of circular bars having spaced portions at predetermined intervals for transferring lead frames taken out from a press, and the plurality of circular bars are connected by a ring coupling. A transfer unit including a conveyor belt; An ultrasonic cleaning unit for immersing the lead frame in a cleaning solvent and generating ultrasonic waves to remove foreign substances attached to the lead frame; A water cleaning tank for cleaning the lead frame passing through the ultrasonic cleaning unit; A pickling tank for forming roughness on the surface of the lead frame passing through the water cleaning tank; A pure shower bath for removing acid components remaining in the lead frame after the pickling bath; And a drying unit for evaporating moisture included in the lead frame.

Here, the drying unit is a compression rolling unit for first absorbing the moisture contained in the lead frame, an air knife for removing the second moisture is removed from the compression rolling unit, and the lead frame passed through the air knife It is preferable to include a drying furnace for drying with air.

The transfer unit may further include an auto stacker for loading the lead frame taken out from the press and a distributor for distributing the lead frame loaded on the auto stacker by left and right reciprocating motion.

The air knife may include upper and lower nozzles to which air is supplied, and the upper and lower nozzles are inclined in a direction in which the lead frame travels.

In addition, the drying unit is a sensor for notifying the abnormal signal when the lead frame is separated from the central portion of the belt conveyed through the air knife more than a predetermined interval, the angle of receiving the signal from the sensor to adjust the angle of the upper and lower nozzles It is preferable to further include a control unit including an adjusting means.

The water cleaning tank may include a plurality of storage tanks in which the lead frame may be immersed, a plurality of supply tanks for supplying washing water to each of the plurality of storage tanks, and a plurality of supplying washing water from the supply tanks to the storage tanks. It is preferable to include a pump.

And it is preferable that the said several supply tank is adjacently connected and is multistage with respect to the advancing direction of the said lead frame.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors will properly describe the concept of terms in order to best explain their own design. 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 the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical ideas of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a view showing the automatic cleaning device of the lead frame according to an embodiment of the present invention, Figure 2 is a plan view showing the cleaning device shown in Figure 1, Figure 3 is passed through the water cleaning bath shown in FIG. 4 is a view illustrating a method of cleaning a lead frame, FIG. 4 is a view schematically showing an air knife according to an example of the present invention, and FIG. 5 is a view showing directions of upper and lower nozzles shown in FIG. 4. 6 is a view showing the shape of the inet belt according to an embodiment of the present invention.

First, referring to Figures 1 and 2, the automatic cleaning device of the lead frame according to an embodiment of the present invention is the transfer unit 100, the ultrasonic cleaning unit 200, the water cleaning tank 300 and the pickling tank 400 And a pure shower tank 500 and a drying unit 600.

The transfer part 100 includes a plurality of circular bars 112 forming a space part 111 at regular intervals to transfer the lead frame L / F taken out after being cut in a press (not shown), and the plurality of Four circular bars are configured to include a conveyor belt connected to each other by a ring coupling, hereinafter referred to as the conveyor belt 110, the inlet belt 110, the ultrasonic cleaning unit 200 for the And it will be described in more detail in the drying unit 600 (see Fig. 6).

Meanwhile, the transfer unit 100 includes an auto stacker 120 for loading the lead frame L / F taken out from the press and a lead frame loaded on the auto stacker 120. Distributor 130 for distributing the L / F by the left and right reciprocating motion may be further provided.

In the transfer part 100 according to an embodiment of the present invention, when the lead frame L / F taken out from the press reaches the auto stacker 120, the two distributors 130 cross each other and reciprocate to each other to form eight The lead frame L / F is evenly supplied to each line.

The ultrasonic cleaner 200 immerses the lead frame L / F transferred by the transfer unit 100 and generates ultrasonic waves to remove foreign substances attached to the lead frame L / F.

The ultrasonic washing unit 200 is divided into an upper tank 210 and a lower tank 220, and the upper tank 210 includes a plurality of washing tanks 211, 212 and 213 therein.

An ultrasonic generator (not shown) for generating ultrasonic waves is installed in the cleaning tanks 211, 212, 213, and uses the lead frame L / F by using a frequency of ultrasonic waves within a range of 28 to 40 kHz to enable high-speed cleaning. Strong cleaning power can be exerted without causing corrosion to), and the high speed cleaning is possible using the frequency of the cleaning tank 213 of the terminal according to an example of the present invention 40 kHz.

In addition, the cleaning solvent of the bottom layer of the cleaning solvent of the lower tank 220 is circulated by the circulation pump 230, the surface cleaning solvent of the lower tank 220 is overflowed (Overfloating) to the oil-water separator 240 After passing through, the purified pure solvent is supplied to the upper tank 210.

On the other hand, the conveyor belt for transporting the lead frame (L / F) from the transfer unit 100 to effectively remove the foreign matter attached to the lead frame (L / F) flowing into the ultrasonic cleaning unit 200 is It is preferable that the belt 110 is formed. Due to the plurality of spaces 112 formed in the internet belt 110, the contact area between the lead frame L / F and the cleaning liquid may be increased, thereby maximizing foreign matter removal efficiency.

In addition, referring to FIG. 3, the water cleaning tank 300 cleans the lead frame L / F that has passed through the ultrasonic cleaning unit 200.

Water cleaning tank 300 according to an embodiment of the present invention is a plurality of storage tank (310a, 310b, 310c) and the plurality of storage tank (310a, 310b, 310c) in which the lead frame (L / F) can be immersed A plurality of pumps (330a, 320b, 320c) for supplying the washing water to the plurality of pumps (330a) for supplying the washing water from the supply tank (320a, 320b, 320c) to the storage tank (310a, 310b, 310c) And 330b and 330c.

On the other hand, it is preferable that the plurality of supply tanks 320a, 320b, and 320c are adjacently connected, and are multi-stage with respect to the traveling direction of the lead frame L / F.

As described above, when the plurality of supply tanks 320a, 320b, and 320c are formed in multiple stages for each supply tank, after the washing water (water) is supplied from the supply tank 320c of the rear stage to the storage tank 310c of the rear stage, The washing water flows into the feed tank 320b of the intermediate stage, and the washing water stored in the feed tank 320b of the intermediate stage flows into the feed tank 320a of the front stage and the feed tank 320b of the intermediate stage and the front stage, in the same manner. It serves to dilute 320a).

In addition, a filter (not shown) is provided on a line through which the washing water flows from the rear end supply tank 320c to the rear end storage tank 310c, thereby maximizing the efficiency of the water cleaning tank 300.

The pickling tank 400 forms roughness on the surface of the lead frame L / F that has passed through the water cleaning tank 300.

The cleaning method of the pickling tank 400 may be performed in the same manner as the cleaning method of the water cleaning tank 300. Soldering, which is a post-process by forming roughness on the surface of the lead frame L / F, may be performed. ) And pickling to enhance the effect of wiring.

The pure shower tank 500 serves to remove the acid components remaining in the lead frame (L / F) after passing through the pickling tank 400, generally rinse before passing through the pure shower tank (500) It is common to increase the efficiency of the pure shower tank by placing a tank.

On the other hand, the conveyor belt passing through the pure shower tank 500 is used in the inlet belt 110 to maximize the pure cleaning ability for the same reason as in the ultrasonic cleaning unit (200).

In addition, the process conditions of the pure shower tank 500 is generally made under high pressure, it is preferable that the injection angle of the upper and lower nozzles from which the pure water is discharged.

Finally, referring to FIGS. 4 and 5, the drying unit 600 serves to evaporate and remove moisture contained in the lead frame L / F after passing through the pure shower tank 500. The drying unit 600 removes the moisture that is not removed from the compression rolling unit 610 and the compression rolling unit 610 to absorb moisture contained in the lead frame L / F. The air knife 620 and the drying furnace 630 for drying the lead frame (L / F) passing through the air knife 620 to hot air.

In this case, the air knife 620 has upper and lower nozzles 621 and 622 to which air is supplied, and the upper and lower nozzles 621 and 622 have the lead frame L / F. It is preferable to incline (θ2) in the direction.

As an example of the present invention, the rollers of the compression rolling unit 610 may be made of four sponges to increase water absorption, and do not cause any damage to the lead frame (L / F) because of the sponge material. There is an advantage.

If the upper and lower nozzles 621 and 622 are inclined in the direction in which the lead frame L / F proceeds, the contact time between the lead frame L / F and air is extended to increase drying efficiency. Because it can increase.

On the other hand, the drying unit 600 is a signal from the sensor and the sensor to inform the abnormal signal when the lead frame (L / F) is separated from the central portion of the belt conveyed through the air knife 620 by a predetermined interval or more It is preferable to further include a control unit including an angle adjusting means for receiving the angle (θ 상부) of the upper and lower nozzles (621,622).

On the other hand, the drying unit 600 is to remove the moisture contained in the lead frame (L / F) step by step can be prevented from uneven or dry state.

As described above, the automatic cleaning device of the lead frame according to the present invention provides the following effects.

First, since the manual labor of the operator can be omitted, the labor can be significantly reduced, and the whole product can be uniformly cleaned and dried by preventing uneven cleaning and drying conditions depending on the inside and outside of the lead frame loaded on the basket. There is an advantage.

Second, since it can be taken out from the press and cleaned without waiting time, it is possible to prevent the foreign substances that have adhered to the lead frame from being hardened, thereby improving the cleaning effect.

Third, there is an advantage that can reduce the deformation and contamination of the lead frame that may occur when the operator loads in the basket.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Various modifications and variations are possible, of course, within the equivalent scope of the utility model registration claims to be described.

Claims (7)

A transfer part including a plurality of circular bars having a space portion at predetermined intervals to transfer the lead frame taken out from the press, and the plurality of circular bars are connected to each other by a ring coupling; An ultrasonic cleaning unit for immersing the lead frame in a cleaning solvent and generating ultrasonic waves to remove foreign substances attached to the lead frame; A water cleaning tank for cleaning the lead frame passing through the ultrasonic cleaning unit; A pickling tank for forming roughness on the surface of the lead frame passing through the water cleaning tank; A pure shower bath for removing acid components remaining in the lead frame after the pickling bath; And With a drying unit for evaporating the moisture contained in the lead frame, Automatic cleaning device of lead frame. The method of claim 1, The drying unit includes a pressurized rolling unit for first absorbing moisture contained in the lead frame, an air knife for removing secondary moisture not removed from the press rolling unit, and a lead frame passing through the air knife. Characterized in that it comprises a drying furnace for drying the furnace, Automatic cleaning device of lead frame. The method according to claim 1 or 2, The transfer unit may further include an auto stacker for loading the lead frame taken out from the press and a distributor for distributing the lead frame loaded on the auto stacker by left and right reciprocating motions. Automatic cleaning device of lead frame. The method of claim 2, The air knife has upper and lower nozzles to which air is supplied, and the upper and lower nozzles are inclined in a direction in which the lead frame proceeds. Automatic cleaning device of lead frame. The method according to claim 2 or 4, The drying unit, a sensor for notifying an abnormal signal when the lead frame is separated by a predetermined interval from the central portion of the belt conveyed through the air knife, and the angle adjustment for adjusting the angle of the upper and lower nozzles by receiving a signal from the sensor Further comprising a control unit comprising a means, Automatic cleaning device of lead frame. The method of claim 1, The water cleaning tank includes a plurality of storage tanks in which the lead frame can be immersed, a plurality of supply tanks for supplying washing water to each of the plurality of storage tanks, and a plurality of pumps for supplying washing water from the supply tank to the storage tank. Characterized in that it comprises a, Automatic cleaning device of lead frame. The method of claim 6, The plurality of supply tank is adjacently connected, characterized in that the multi-step in the traveling direction of the lead frame, Automatic cleaning device of lead frame.

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