KR101681829B1

KR101681829B1 - Apparatus for cleaning a mask

Info

Publication number: KR101681829B1
Application number: KR1020150063112A
Authority: KR
Inventors: 송진헌
Original assignee: (주) 에스프라임
Priority date: 2015-05-06
Filing date: 2015-05-06
Publication date: 2016-12-01
Also published as: KR20160131228A

Abstract

The mask cleaning apparatus includes a cleaning chamber, a reservoir, a bracket, a jetting portion, and a venturi structure. The storage unit stores and supplies the washing liquid. The bracket is installed inside the cleaning chamber, and a mask is mounted. The jetting unit is connected to the storage unit through a supply line, and is installed in the cleaning chamber to spray a cleaning liquid supplied from the storage unit to a mask mounted on the bracket. The venturi structure is installed in the supply line, and the cleaning liquid supplied from the storage unit is sprayed in a fume state according to a venturi effect in the jetting unit.

Description

[0001] APPARATUS FOR CLEANING A MASK [0002]

The present invention relates to a mask cleaning apparatus, and more particularly, to an apparatus for cleaning a metal mask used in a process of printing solder on a substrate.

2. Description of the Related Art Generally, a printed circuit board is an essential component mounted on an electronic product, on which a circuit for performing an electrical function of the electronic product is printed, and on the surface thereof, a semiconductor chip, a diode, a capacitor, The same electronic components are mounted.

Specifically, the printed circuit board includes a step of cutting a raw material made of a resin material to form a base plate, a step of forming an inner layer circuit on the base plate by performing exposure, development, erosion and peeling process on the base plate A step of forming a via hole for interlayer connection of the inner layer circuit on the base plate, a step of electrically connecting the inner layer circuit and the outer layer of the base plate by copper plating the via hole portion, A step of forming an outer layer circuit by performing a developing process, a developing process, a corrosion process and a peeling process, a step of protecting the outer layer circuit by applying a remaining portion of the outer layer circuit except the metal terminal portion, The metal terminals to which the components are mounted include flux through a metal mask. It is prepared by a step of applying the solder.

When the metal mask used in the process of manufacturing the printed circuit board is repeatedly used, a foreign matter may accumulate on the hole portion and cause serious failure such that the solder can not be applied to the metal terminal Therefore, it is most important to remove the foreign matter adhered through the separate washing process after a certain number of times of use.

At this time, the process of washing the mask is carried out using about 500 liters or more so that isopropyl alcohol (IPA) having explosive, volatile and toxic characteristics can be stably removed from the mask. Due to the risk of the isopropyl alcohol (IPA) and the amount of the isopropyl alcohol (IPA), the process of cleaning the mask is performed in a relatively large space isolated from the process of manufacturing the printed circuit board.

According to this characteristic, the operator performing the process of cleaning the mask must move the mask to the isolated space at the process site for manufacturing the PCB to clean the mask, The problem is very uncomfortable. In particular, recently, as the hole portion of the mask is miniaturized due to fine pitching of the metal terminal, the frequency of washing of the mask is further increased, so that the above inconvenience is more remarkable.

(Patent Document 1) Korean Patent Laid-Open No. 10-1997-0058410 (published on July 31, 1997, Metal mask cleaning apparatus)

An object of the present invention is to provide a device capable of washing a metal mask used at this time in a process space for applying a solder containing a flux to a printed circuit board.

According to an aspect of the present invention, a mask cleaning apparatus includes a cleaning chamber, a reservoir, a bracket, a spray portion, and a venturi structure.

The storage unit stores and supplies the washing liquid. The bracket is installed inside the cleaning chamber, and a mask is mounted. The jetting unit is connected to the storage unit through a supply line, and is installed in the cleaning chamber to spray a cleaning liquid supplied from the storage unit to a mask mounted on the bracket. The vent structure is installed in the supply line, and the cleaning liquid supplied from the storage unit is sprayed in a fume state according to the venturi effect in the jetting unit.

The venturi structure according to an embodiment may include an air supply unit connected to the supply line and connected to the supply line of the air supply unit to supply compressed air from the outside, And an air guide portion for guiding the air.

The mask cleaning apparatus according to an embodiment may further include a valve disposed between the storage section of the supply line and the air supply section to control whether the cleaning liquid is supplied from the storage section.

The apparatus for cleaning a mask according to an exemplary embodiment of the present invention includes an inlet connected to the inside of the cleaning chamber and an inlet connected to the air supply unit and generating the compressed air through the air supplied from the inlet, And a compressor provided with an outlet for providing the outlet.

The mask cleaning apparatus according to an embodiment of the present invention may include a second jetting unit installed in the cleaning chamber to spray air supplied from the outside to the mask mounted on the bracket and a second jetting unit connected to the second jetting unit, And a second venturi structure portion that increases the supply amount of the air according to a venturi effect in the second jet portion.

The second venturi structure according to an embodiment includes a first air supply unit connected to the second jet unit and supplied with compressed air from the outside, a second air supply unit connected in parallel to the first air supply unit, And a second air guide portion installed at a portion of the first air supply portion connected to the second air supply portion and guiding the passage through which the compressed air flows, to be narrowed.

The apparatus for cleaning a mask according to an exemplary embodiment of the present invention includes a discharge unit for connecting a lower portion of the cleaning chamber to the storage unit and storing the cleaning liquid in the storage unit for recycling the cleaning liquid for cleaning the mask, And a filter unit for filtering the material washed in the mask in the washed washing liquid.

The mask cleaning apparatus may further include a second filter unit mounted on the supply line and removing foreign matter from the cleaning liquid stored in the storage unit.

According to such a mask cleaning apparatus, the cleaning liquid supplied from the storage portion to the mask mounted on the bracket inside the cleaning chamber is sprayed by the spray portion in the fume state according to the venturi effect through the venturi structure portion, The mask can be cleaned with a relatively small amount.

Accordingly, since the overall size of the mask cleaning apparatus can be reduced, the mask cleaning apparatus can be installed in a process site for applying solder including a flux to the surface of a printed circuit board, so that the mask can be conveniently Can be cleaned.

Therefore, since the mask can always be maintained in a good state through the convenient cleaning of the mask, the solder can be accurately and precisely and stably applied to the printed circuit board to prevent defects. Thus, defective application of the solder on the printed circuit board can be prevented, thereby preventing an increase in manufacturing cost.

1 is a schematic view of a mask cleaning apparatus according to an embodiment of the present invention.
2 is an enlarged view of a portion A in Fig.

Hereinafter, a mask cleaning apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

FIG. 1 is a schematic view of a mask cleaning apparatus according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion A of FIG.

1 and 2, a mask cleaning apparatus 1000 according to an embodiment of the present invention includes a cleaning chamber 100, a storage unit 200, a bracket 300, a jetting unit 400, 500).

The cleaning chamber 100 provides a space for cleaning the metal mask 10 used in the process of applying the solder containing the flux to the printed circuit board. The cleaning chamber 100 may have a sealing structure to prevent the cleaning liquid CL, which will be described later in detail, from leaking to the outside.

The storage unit 200 stores a cleaning liquid CL for cleaning the mask 10, which substantially eliminates flux contained in the solder. Here, the cleaning liquid CL may include an auto clean 40 of Alpha, which is colorless, odorless, nonvolatile, and heat resistant, which is well reacted with the flux.

The bracket 300 is installed inside the cleaning chamber 100. The mask (10) for cleaning is mounted on the bracket (300). The bracket 300 may be configured to be movable along a rail (not shown) to the outside of the cleaning chamber 100 so that an operator can easily mount or separate the mask 10 therefrom. The bracket 300 may be installed in the cleaning chamber 100 so that the bracket 300 can be replaced according to the size of the mask 10. In addition to the mask 10, the bracket 300 may be replaced with a structure capable of mounting a squeegee which can be used in a process of applying solder containing the flux to the printed circuit board .

The jetting unit 400 is connected to the storage unit 200 through a supply line 410 to receive the cleaning liquid CL. The sprayer 400 is installed in the cleaning chamber 100 to spray the cleaning liquid CL supplied from the storage unit 200 to the mask 10 mounted on the bracket 300. Accordingly, the jetting unit 400 may have a nozzle structure capable of jetting the cleaning liquid at a predetermined angle. The injection unit 400 may be provided with a separate transfer unit (not shown) so as to be able to move along one side of the mask 10 in a plan view so as to spray the mask 10 on one side of the mask 10 as a whole.

The venturi structure 500 is installed in the supply line 410. The venturi structure unit 500 allows the cleaning liquid CL supplied from the storage unit 200 to be sprayed in the fume state in accordance with the venturi effect in the spray unit 400. [ For this purpose, the venturi structure 500 may include an air supply unit 510 and an air guide unit 520.

The air supply unit 510 is connected to the supply line 410 in a parallel structure. The air supply unit 510 is connected to a compressor 600 that generates compressed air CAR and supplies the compressed air CAR to the spray unit 400. The compressor 600 includes an inlet 620 for generating the compressed air CAR when the outlet 610 is connected to the air supply unit 510, As shown in FIG. The internal space of the washing chamber 100 prevents the internal pressure of the washing chamber 100 from rising due to the washing liquid CL injected from the spray unit 400 into the fume state by the compressor 600. [ , But rather the internal pressure can be reversely reduced, so that the stable state can always be maintained. That is, as the internal pressure of the cleaning chamber 100 is increased by the cleaning fluid CL injected in the fume state, the cleaning fluid CL in the fume state is prevented from leaking into the gap .

The air guide unit 520 is installed at a position where the air supply unit 510 is connected to the supply line 410. The air guide part 520 guides the passage through which the compressed air CAR flows from the air supply part 510 to be narrowed.

In this case, the compressed air CAR supplied from the air supply unit 510 is speeded up by the air guide unit 520, and thus the portion of the air supply unit 510 connected to the supply line 410 The ambient pressure is lowered due to the increased flow rate and the cleaning liquid CL supplied from the supply line 410 is partially mixed with the compressed air CAR and is supplied to the spraying unit 400. At this time, the air guide unit 520 can adjust the width of the passage so that the cleaning liquid CL can be mixed with about 10% of the compressed air CAR.

The spray unit 400 receives the compressed air CAR and the cleaning liquid CL in a mixed ratio of about 9: 1 by the venturi structure unit 500, By spraying, the mask 10 can be cleaned with a relatively small amount. For example, when using volatile isopropyl alcohol (IPA) as in the background art to stably clean the mask 10, an amount of about 500 liters is needed, while a non-volatile cleaning liquid CL The venturi structure 500 can be used in a significantly small amount of about 3 liters.

Accordingly, since the overall size of the mask cleaning apparatus 1000 can be reduced, the mask cleaning apparatus 1000 can be installed at the process site for applying solder containing flux to the surface of the printed circuit board, It can be conveniently washed without moving into space.

Therefore, since the mask 10 can always be maintained in a good state through the convenient cleaning of the mask 10, the solder can be stably and accurately applied to the printed circuit board. Thus, defective application of the solder on the printed circuit board can be prevented, thereby preventing an increase in manufacturing cost.

The mask cleaning apparatus 1000 may control whether the cleaning liquid CL is supplied from the storage unit 200 between the storage unit 200 of the supply line 410 and the air supply unit 510 And may further include a valve 700 installed therein.

When the valve 700 is opened, the cleaning liquid CL is supplied from the storage unit 200 and the cleaning process described above is performed. When the valve 700 is closed, the outlet of the compressor 600 is closed, only the compressed air CAR generated from the outlet 610 is sprayed onto the mask 10 through the jetting unit 400 so that the washed mask 10 can be continuously dried.

In a different concept, the mask cleaning apparatus 1000 performs the drying process by opening and closing the valve 700, and the mask cleaning apparatus 1000 may be configured to perform the cleaning process and the efficiency of the drying process And further includes a second injection part 450 and a second venturi structure part 550 similar to the injector part 400 and the venturi structure part 500 for stability.

The second jetting unit 450 receives the compressed air CAR generated from the compressor 600 and injects the compressed air CAR into the mask 10 mounted on the bracket 300 in the washing chamber 100. [ And dried. As in the case of the jetting unit 400, the second jetting unit 450 is also provided with a second transfer unit (not shown) so as to be able to move along the one surface of the mask 10 in a planar manner, (Not shown) may be installed.

The second venturi structure 550 is connected to the second injection part 450. The second venturi structure unit 550 compresses the compressed air CAR supplied from the compressor 600 to the supply amount of the compressed air CAR according to the venturi effect in the second jetting unit 450. [ . For this purpose, the second venturi structure 550 includes a first air supply unit 560, a second air supply unit 570, and a second air guide unit 580.

The first air supply unit 560 connects the outlet 610 of the compressor 600 and the second injection unit 450 to supply the compressed air CAR generated from the compressor 600. [ To the second jetting unit 450. [0044] The second air supply unit 570 is connected to the first air supply unit 560 in parallel. The second air supply unit 570 has a structure that is exposed to the outside so as to supply natural air AR.

The second air guide unit 580 is installed at a portion of the first air supply unit 560 connected to the second air supply unit 570. The second air guide unit 580 guides the passage of the compressed air CAR from the outlet 610 of the compressor 600 to be narrowed.

The flow rate of the compressed air CAR in the second air guide unit 580 is increased and the flow rate of the compressed air CAR is increased in the second air guide unit 580, The amount of the compressed air CAR is increased and the mask 10 can be more effectively dried by mixing the compressed air AR with the compressed air CAR.

The mask cleaning apparatus 1000 may further include a discharge unit 800, a first filter unit 900, and a second filter unit 950 for efficient use thereof.

The discharge part 800 connects the lower part of the cleaning chamber 100 and the storage part 200. The discharge unit 800 stores the cleaning liquid CL in the storage unit 200 for recycling the cleaning liquid CL that has washed the mask 10. At this time, the bottom of the washing chamber 100 may have a structure inclined at a predetermined angle toward the discharge unit 800 so that the cleaning liquid CL having washed the mask 10 is naturally discharged to the discharge unit 800 Lt; / RTI >

The first filter unit 900 is installed in the discharge unit 800. The first filter unit 900 filters the solder containing the flux used to apply the printed circuit board among the cleaning liquid CL having washed the mask 10. The first filter unit 900 may be connected to a separate solder storage unit 910 to store the filtered solder.

The second filter unit 950 is installed adjacent to the storage unit 200 in the supply line 410. The second filter unit 950 filters the fine particles in the cleaning solution CL so that clogging does not occur during the spraying of the cleaning solution CL from the spray unit 400. [ The second filter unit 950 may preliminarily store the filtered cleaning liquid CL so that the cleaning liquid CL can be smoothly supplied to the spray unit 400 in the process of filtering the fine material. It can contain a separate storage space.

While the present invention has been described in connection with what is presently considered to be practical and exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

CL: cleaning solution AR: air
CAR: Compressed air 10: Mask
100: Cleaning chamber 200:
300: Bracket 400:
410: supply line 450: second branching part
500: Venturi structure part 510: Air supply part
520: air guide portion 550: second venturi structure
560: first air supply part 570: second air supply part
580: second air guide part 600: compressor
610: Outlet 620: Inlet
700: valve 800:
900: first filter portion 910: solder storage portion
950: second filter part 1000: mask cleaning device

Claims

A cleaning chamber;
A storage part for storing and supplying the washing solution;
A bracket installed inside the cleaning chamber, the bracket being mounted with a mask;
A spraying part connected to the storage part through a supply line and spraying a cleaning liquid supplied from the storage part to a mask mounted on the bracket inside the cleaning chamber; And
And a venturi structure part installed in the supply line and spraying the cleaning liquid supplied from the storage part in a fume state according to a venturi effect in the jet part,
An air supply unit connected to the supply line and supplied with compressed air from outside; And
And an air guide portion provided at a portion of the air supply portion connected to the supply line and guiding the passage through which the compressed air flows,
An inlet connected to the inside of the cleaning chamber and an outlet connected to the air supply unit and generating the compressed air through the air supplied from the inlet to the air supply unit, further comprising a compressor for compressing the mask.

delete

The apparatus according to claim 1, further comprising a valve provided between the storage section of the supply line and the air supply section to control whether the cleaning liquid is supplied from the storage section.

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The method according to claim 1,
A second spraying unit installed in the cleaning chamber to spray air supplied from the outside to the mask mounted on the bracket; And
And a second venturi structure portion connected to the second spray portion and increasing the supply amount of the air according to a venturi effect in the second spray portion. Mask cleaning device.

6. The apparatus of claim 5, wherein the second venturi structure
A first air supply unit connected to the second jet unit and supplied with compressed air from the outside;
A second air supply unit connected in parallel to the first air supply unit and supplied with air from the outside; And
And a second air guide unit installed at a portion of the first air supply unit that is connected to the second air supply unit and guiding the passage through which the compressed air flows, to be narrowed.

The cleaning apparatus according to claim 6, further comprising: an inlet connected to the inside of the cleaning chamber; and compressed air generated through the air supplied from the inlet, connected to the first air supply unit, Wherein the compressor further comprises a compressor having an outlet for providing the cleaning fluid.

The method according to claim 1,
A discharge unit connecting the lower portion of the cleaning chamber to the storage unit and storing the cleaning liquid in the storage unit for recycling for discharging the cleaning liquid for washing the mask; And
Further comprising a filter unit installed in the discharge unit and filtering the material washed in the mask in a washing liquid in which the mask is washed.

The apparatus of claim 1, further comprising a second filter unit mounted on the supply line for removing foreign matter from the wash liquid stored in the storage unit.