KR20230155852A - A squeegee system - Google Patents

Abstract

A squeegee system according to an embodiment includes a body portion that can be moved in at least one direction, a squeegee portion disposed below the body portion, and a mask portion disposed below the squeegee portion, and the lower surface of the squeegee portion is the mask portion. It is a squeegee system in which the inclination of the squeegee part can be automatically controlled to make surface contact with one surface.

Description

Squeegee system {A SQUEEGEE SYSTEM}

The examples below relate to squeegee systems.

With the development of the electronics industry, demands for higher functionality and miniaturization of electronic components are rapidly increasing. According to this trend, the bump pitch of ICs and substrates is becoming extremely fine and diverse. Accordingly, many processes for forming bumps on boards are currently being developed and mass produced, and the most commonly used bump forming method is the solder paste printing method using a metal mask.

However, this metal mask printing method tends to be difficult to keep up with the quality level such as the height and shape of the bump in fine pitch bumps, so many researches and patents have been published to solve this problem.

Currently, the squeegee type or proflow type is mainly used when filling solder paste. In particular, the squeegee type is widely used due to its advantages in ease of use and productivity.

However, problems such as the occurrence of voids and difficulty maintaining the shape during rolling are emerging as serious problems along with the finer pitch of the bump.

Domestic Patent Publication No. 10-2020-0144680 discloses the technical idea of a squeegee system having a sealed pressure blade.

An object according to one embodiment is to provide a squeegee system in which the inclination of a spray element can be automatically controlled by an elastic element.

The purpose of one embodiment is to provide a squeegee system that can adjust the angle formed by the squeegee portion with the mask portion or the pressure applied to the squeegee portion by the mask portion.

The purpose of one embodiment is to provide a squeegee system that can determine whether a substrate or a mask portion is aligned at a preset position.

A squeegee system according to an embodiment includes a body portion that can be moved in at least one direction, a squeegee portion disposed below the body portion, and a mask portion disposed below the squeegee portion, and the lower surface of the squeegee portion is the mask portion. The inclination of the squeegee portion may be automatically controlled to make surface contact with one surface of the portion.

A first movable frame connected to the body portion and disposed below the body portion, a second movable frame capable of being hinged about a first axis with respect to the first movable frame, and disposed below the second movable frame It may include a spray element capable of spraying fluid toward the mask portion.

In particular, the squeegee unit includes a plurality of elastic elements respectively disposed at both ends between the first movable frame and the second movable frame, and each of the elastic elements is arranged to press the second movable frame downward, The tilt of the injection element can be automatically controlled based on the first axis.

At this time, the squeegee part may further include a sensor element disposed on a portion of the spray element and capable of measuring a pressure value acting on the spray element when the spray element contacts one surface of the mask portion.

Furthermore, the spray element further includes a pressure control unit that adjusts the pressure applied to the spray element when it contacts one surface of the mask unit, and the pressure control unit compares the pressure value measured by the sensor element with a preset pressure value. Thus, the injection element can be pressurized so that the pressure value acting on the injection element is equal to the preset pressure value.

The pressure control unit may include a pressure control shaft extending in a height direction, a pressure control member connected to the squeegee unit and moving along the pressure control shaft, and a pressure control motor formed at an upper end of the pressure control shaft.

In addition, it further includes an angle adjusting unit capable of adjusting the angle of the squeegee unit with respect to the second axis, wherein the angle adjusting unit includes a link member at one end connected to the second movable frame, an angle adjusting shaft extending in the height direction, and It may include an angle adjustment member disposed between a link member and the angle adjustment axis and moving along the angle adjustment axis, and an angle adjustment motor formed at an upper end of the angle adjustment axis.

In addition, it further includes a support part disposed below the mask part and capable of supporting the substrate, and at least one support part formed on one side of the support part and used to determine whether the substrate placed on the support part is aligned at a preset position. It may include a first determination element and at least one second determination element for determining whether the mask unit formed on the other side of the support unit and disposed on the upper side of the support unit is aligned at a preset position.

The first determination element may include a first hole formed on the support portion and a first vision for monitoring a corner portion of the substrate through the first hole.

The second determination element may include a second hole formed on the support part and a second vision for monitoring a corner portion of the mask part through the second hole.

It further includes a support part disposed below the mask part and capable of supporting a substrate, and determines whether the substrate formed on one side of the support part and placed on the support part and the mask part disposed on an upper side of the support part are aligned at a preset position. It may include at least one third judgment element for determining whether or not.

The third determination element includes a third hole formed on the support portion, a third vision monitor for monitoring the corner portion of the substrate through the third hole, and a fourth vision monitor for monitoring the corner portion of the mask portion through the third hole. May include vision.

In the squeegee system according to one embodiment, the tilt of the spraying element can be automatically controlled by the elastic element.

The squeegee system according to one embodiment can adjust the angle formed by the squeegee part and the mask part or the pressure applied to the squeegee part by the mask part.

The squeegee system according to one embodiment may determine whether the substrate or the mask portion is aligned at a preset position.

1 shows a squeegee system according to one embodiment.
Figure 2 shows the squeegee portion of a squeegee system according to one embodiment in detail.
Figure 3 shows a cross-section of a sensor element portion of a squeegee system according to one embodiment.
Figure 4 shows in detail the pressure control process of the squeegee system according to one embodiment.
Figure 5 shows in detail the angle adjustment process of the squeegee system according to one embodiment.
Figure 6 shows a support portion of a squeegee system according to one embodiment.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, various changes can be made to the embodiments, so the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes for the embodiments are included in the scope of rights.

The terms used in the examples are for descriptive purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

In addition, when describing with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the reference numerals, and duplicate descriptions thereof will be omitted. In describing the embodiments, if it is determined that detailed descriptions of related known technologies may unnecessarily obscure the gist of the embodiments, the detailed descriptions are omitted.

Additionally, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. When a component is described as being "connected," "coupled," or "connected" to another component, that component may be directly connected or connected to that other component, but there is no need for another component between each component. It should be understood that may be “connected,” “combined,” or “connected.”

Components included in one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, the description given in one embodiment may be applied to other embodiments, and detailed description will be omitted to the extent of overlap.

1 shows a squeegee system according to one embodiment. Figure 2 shows the squeegee portion of a squeegee system according to one embodiment in detail. Figure 3 shows a cross-section of a sensor element portion of a squeegee system according to one embodiment. Figure 4 shows in detail the pressure control process of the squeegee system according to one embodiment. Additionally, Figure 5 shows in detail the angle adjustment process of the squeegee system according to one embodiment. Figure 6 shows a support portion of a squeegee system according to one embodiment.

Referring to Figure 1, the squeegee system 10 may include a body portion 100, a squeegee portion 200, and a mask portion 500. Additionally, as will be described later, the squeegee system 10 may further include an angle adjusting unit 300 and a pressure adjusting unit 400.

A ball screw 110 may be formed in one part of the body 100, and the ball screw may be coupled to a specific axis (not shown). The body portion 100 can move in at least one direction along a specific axis.

The squeegee part 200 may be formed between the body part 100 and the mask part 500. The inclination of the squeegee unit 200 may be automatically controlled so that the lower surface of the squeegee unit 200 makes surface contact with one surface of the mask unit 500. The squeegee unit 200 may include a first movable frame 210, a second movable frame 220, and an injection element 230.

The angle adjusting unit 300 may include an angle adjusting motor 310, an angle adjusting member 320, an angle adjusting shaft 330, and a link member 340. The pressure control unit 400 may include a pressure control motor 410, a pressure control member 420, and a pressure control shaft 430.

Referring to (a) of Figure 2, the first movable frame 210 is connected to the body portion 100 and may be disposed below the body portion 100. The second movable frame 220 is connected to the first movable frame 210 by a fastening element 221, and has a first axis ( It can be hinged based on S1). The injection element 230 is disposed below the second movable frame 220 and can spray fluid toward the mask unit 500. The injection element 230 may have a blade shape. The injection element 230 may be supported by a squeegee holder 231 formed on the lower side of the second movable frame 220.

The squeegee unit 200 may further include an elastic element 240. The elastic elements 240 may be disposed at both ends between the first movable frame 210 and the second movable frame 220, respectively. Each elastic element 240 is fixed on the first movable frame 210 and may be arranged to press the second movable frame 220 downward. Without movement of the first movable frame 210, the second movable frame 220 moves in the first direction D1 or the second direction D2 based on the first axis S1 hinged by the fastening element 221. You can move. The tilt of the injection element 230 can be automatically controlled based on the first axis S1.

Referring to (b) of FIG. 2, the second movable frame 220 according to one embodiment may move in the first direction D1 in response to the tilt of the tilted mask portion 500. By automatically controlling the inclination of the injection element 230, the area of the injection element 230 in surface contact with the mask portion 500 can be increased. Injection or application of fluid from the injection element 230 toward the mask unit 500 can be achieved more smoothly.

Referring to Figure 3, the squeegee unit 200 may further include a sensor element 211. The sensor element 211 may be disposed in a portion of the injection element 230. The sensor element 211 can measure the pressure value acting on the injection element 230 when the injection element 230 contacts one surface of the mask portion 500.

Referring to Figure 4, the squeegee system 10 may further include a pressure regulator 400. The pressure adjusting unit 400 can adjust the pressure applied to the spraying element 230 when the spraying element 230 contacts one surface of the mask unit 500. The pressure regulator 400 compares the pressure value measured by the sensor element 211 with the preset pressure value and pressurizes the injection element 230 so that the pressure value acting on the injection element 230 is equal to the preset pressure value. You can.

The pressure control unit 400 may include a pressure control shaft 430, a pressure control member 420, and a pressure control motor 410. The pressure control shaft 430 may extend in the height direction. The pressure adjustment member 420 is connected to the squeegee unit 200 and can move along the pressure adjustment axis 430. The pressure control motor 410 may be formed at the top of the pressure control shaft 430.

Referring to (a) of Figure 4, before the injection element 230 makes surface contact with the mask unit 500, the user inputs the pressure value for the injection element 230 to be set through the control unit (not shown). can do. When the pressure control motor 410 operates in one direction as shown in (b) of FIG. 4, the pressure control member 420 may descend along the pressure control axis 430. As the squeegee part 200 descends, the spray element 230 may come into surface contact with the mask part 500. The sensor element 211 can measure the pressure value received by the injection element 230, and the pressure adjustment motor 410 so that the pressure acting on the injection element 230 can be equal to the preset pressure based on the measured value. ) can operate in one direction or the other to lower or raise the injection element 230.

When the pressure value of the injection element 230 measured by the sensor element 211 is smaller than the input pressure value, the pressure control motor 410 operates in one direction so that the injection element 230 can descend. From thereon, the pressure value received by the injection element 230 by the mask unit 500 increases, and the pressure value of the injection element 230 can be adjusted to be equal to the input pressure value.

Referring to Figure 5, the squeegee system 10 may further include an angle adjusting unit 300. As will be described later, the angle adjusting unit 300 may adjust the angle of the squeegee unit 200 in the third direction D3 or the fourth direction D4 based on the second axis S2. The angle adjustment unit 300 may include a link member 340, an angle adjustment shaft 330, an angle adjustment member 320, and an angle adjustment motor 310.

One end of the link member 340 may be connected to the second movable frame 220. The angle adjustment axis 330 may extend in the height direction. The angle adjustment member 320 is disposed between the link member 340 and the angle adjustment axis 330 and can move along the angle adjustment axis 330. The angle adjustment motor 310 may be formed at the top of the angle adjustment shaft 330. The squeegee system 10 according to one embodiment may adjust the angle of the squeegee unit 200 with respect to the fourth direction D4. As shown in (a) of Figure 5, in a state where there is no angle formed by the vertical direction of the injection element 230 and the mask portion 500, the angle adjustment motor 310 can operate in one direction as shown in (b) of Figure 5. You can. The angle adjustment member 320 moves upward along the angle adjustment axis 330, and one end of the link member 340 connected to the lower end of the angle adjustment member 320 may also move upward.

The other end of the link member 340 may guide the second movable frame 220 in the direction of the link member 340. Based on the second axis (S2), which is the point where the first movable frame 210 and the body portion 100 are connected, the first movable frame 210 and the second movable frame 220 are integrated and move in the fourth direction (D4). ) can be moved. The angle A formed by the vertical direction between the spray element 230 and the mask portion 500 may be increased. When the angle adjustment motor 310 operates in the other direction, the angle A formed by the vertical direction between the injection element 230 and the mask portion 500 may decrease.

Referring to Figure 6, the squeegee system 10 may further include a support portion 600 and at least one determination element. The support part 600 is disposed below the mask part 500 and can support the substrate 510.

Referring to (a) of FIG. 6 , the first determination element 610 is formed on one side of the support part 600 and may include a first hole 611 and a first vision 612. The first hole 611 is formed on the support part 600, and two corners of the substrate 510 can be placed in each of the first holes 611. The first vision 612 can monitor the corner portion of the substrate 510 through the first hole 611. The first determination element 610 may determine whether the substrate 510 placed on the support unit 600 is aligned at a preset position.

The second determination element 620 may be formed on the other side of the support part 600. The second determination element 620 may include a second hole 621 and a second vision 622. The second hole 621 is formed on the support part 600, and two corners of the mask part 500 can be placed in the second holes 621, respectively. The second vision 622 can monitor the corner portion of the mask portion 500 through the second hole 621. The second determination element 620 may determine whether the mask unit 500 disposed on the upper side of the support unit 600 is aligned at a preset position.

Referring to (b) of Figure 6, the third judgment element 630 is formed on one side of the support part 600 and includes a third hole 631, a third vision 632, and a fourth vision 633. can do. The third hole 631 is formed on the support part 600, and two corners of the substrate 510 and two corners of the mask part 500 can be placed in the third hole 631, respectively.

The third vision 632 can monitor the corner portion of the substrate 510 through the third hole 631. The fourth vision 633 can monitor the corner portion of the mask portion 500 through the third hole 631.

The third determination element 630 may determine whether the substrate 510 placed on the support unit 600 and the mask unit 500 disposed on the upper side of the support unit 600 are aligned at a preset position.

The squeegee system including the configurations described above can automatically control the inclination of the spray element by the elastic element, and can adjust the angle formed by the squeegee part with the mask part or the pressure applied to the squeegee part by the mask part. Additionally, it can be determined whether the substrate or mask part is aligned at a preset position.

Although the embodiments have been described with limited drawings as described above, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent.

Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the following claims.

10: Squeegee system
100: body part
200: Squeeze branch
210: first movable frame
211: sensor element
220: second movable frame
221: fastening element
230: Spray element
240: elastic element
300: Angle adjustment unit
400: pressure control unit
500: Mask part
510: substrate
600: support part
610: First judgment element
620: Second judgment element
630: Third judgment element

Claims (12)

a body portion movable in at least one direction;
A squeegee portion disposed below the body portion; and
a mask portion disposed below the squeegee portion;
Including,
The inclination of the squeegee part can be automatically controlled so that the lower surface of the squeegee part makes surface contact with one surface of the mask part.
Squeegee system.
According to paragraph 1,
The squeegee part,
a first movable frame connected to the body and disposed below the body;
a second movable frame that can be hinged about a first axis with respect to the first movable frame; and
a spray element disposed below the second movable frame and capable of spraying fluid toward the mask portion;
Including a squeegee system.
According to paragraph 2,
The squeegee part,
a plurality of elastic elements respectively disposed at both ends between the first movable frame and the second movable frame;
Including,
Each of the elastic elements is arranged to press the second movable frame downward so that the tilt of the spray element can be automatically controlled with respect to the first axis.
According to paragraph 3,
The squeegee part,
disposed on a portion of the injection element,
A sensor element capable of measuring a pressure value acting on the spray element when the spray element contacts one surface of the mask portion;
A squeegee system further comprising:
According to paragraph 4,
a pressure regulator that adjusts the pressure applied to the spray element when the spray element contacts one surface of the mask portion;
It further includes,
The pressure regulator compares the pressure value measured by the sensor element with a preset pressure value and pressurizes the injection element so that the pressure acting on the injection element is equal to the preset pressure value.
According to clause 5,
The pressure regulator,
a pressure regulating shaft extending in the height direction;
a pressure adjustment member connected to the squeegee unit and moving along the pressure adjustment axis; and
a pressure control motor formed at the top of the pressure control shaft;
Including a squeegee system.
According to clause 6,
An angle adjustment unit capable of adjusting the angle of the squeegee unit with respect to a second axis;
It further includes,
The angle adjusting unit,
a link member whose end is connected to the second movable frame;
An angle adjustment axis extending in the height direction;
An angle adjustment member disposed between the link member and the angle adjustment axis and moving along the angle adjustment axis; and
An angle adjustment motor formed at the top of the angle adjustment shaft;
Including a squeegee system.
In clause 7,
a support portion disposed below the mask portion to support the substrate;
It further includes,
at least one first determination element formed on one side of the support unit and configured to determine whether the substrate placed on the support unit is aligned to a preset position; and
at least one second determination element for determining whether the mask part formed on the other side of the support part and disposed on the upper side of the support part is aligned at a preset position;
Including a squeegee system.
According to clause 8,
The first judgment element is,
a first hole formed on the support portion; and
a first vision that monitors a corner of the substrate through the first hole;
Including a squeegee system.
According to clause 9,
The second judgment element is,
a second hole formed on the support part; and
a second vision that monitors a corner of the mask portion through the second hole;
Including a squeegee system.
In clause 7,
a support portion disposed below the mask portion to support the substrate;
It further includes,
at least one third determination element for determining whether the substrate formed on one side of the support portion and placed on the support portion and the mask portion disposed on an upper side of the support portion are aligned at a preset position;
Including a squeegee system.
According to clause 11,
The third judgment factor is,
a third hole formed on the support portion;
a third vision that monitors a corner of the substrate through the third hole; and
a fourth vision that monitors a corner of the mask portion through the third hole;
Including a squeegee system.

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