WO2006025280A1

WO2006025280A1 - Dispenser and method for correcting defect

Info

Publication number: WO2006025280A1
Application number: PCT/JP2005/015543
Authority: WO
Inventors: Koichi Kajiyama; Michinobu Mizumura
Original assignee: V Technology Co., Ltd.
Priority date: 2004-09-01
Filing date: 2005-08-26
Publication date: 2006-03-09
Also published as: CN101010146A; TWI388378B; JP2006068627A; TW200609541A; KR20070055521A; KR101184431B1; JP4778213B2; CN100592936C

Abstract

A dispenser comprising a container (1) containing color UV-curing resin (4) for correcting the defective part of a color filter substrate, an ejection needle (2) fixed to the forward end of the container (1) and ejecting the color UV-curing resin (4) to the defective part, and an ejection control means (3) for ejecting the color UV-curing resin (4) from the ejection needle (2) by imparting a positive pressure to the color UV-curing resin (4) in the container (1), wherein the ejection needle (2) is shaped thinner at the tip end than at the needle body part by drawing a thermally softened glass pipe. A very small defective part of an ejection object can be corrected by filling that defective part with ejected material.

Description

Specification

Dispenser and defect correction method

Technical field

TECHNICAL FIELD [0001] The present invention relates to a dispenser and a defect correction method for discharging a discharge material onto a discharge target and correcting the defect of the discharge target. Specifically, the discharge needle is obtained by stretching a softened glass pipe. This is a dispenser and a defect correcting method for forming a fine needle tip thinner than the needle main body and filling the discharge material into a minute defect portion of the discharge target to correct the defect portion. is there.

Background art

A conventional defect correction method of this type is, for example, a defect correction method for a color filter for a liquid crystal display device. The defect portion on the color filter is irradiated with a YAG laser and trimmed to enlarge the defect portion. Then, the trimmed defective portion is filled with a color ultraviolet curable resin for correction by a dispenser, and the defective portion is corrected by irradiating ultraviolet rays to cure the color ultraviolet curable resin (for example, And Patent Document 1).

Patent Document 1: JP-A-6-10991-9

Disclosure of the invention

Problems to be solved by the invention

However, since the dispenser used in such a conventional defect correction method generally uses a stainless steel discharge needle, the minimum inner diameter of the needle that can be formed is about 100 μΐη. The minimum discharge amount was about IL. On the other hand, the amount of colored UV curable resin required to correct the finely trimmed defective portion of the color filter is as small as about 5 pL to 20 pL. Therefore, when a conventional stainless steel discharge needle is used. However, there was a problem that the color ultraviolet curable resin overflowed from the trimmed defect. Therefore, a defect correction method using a dispenser has not been put into practical use.

[0004] Accordingly, the present invention provides a dispenser and a defect correction method for addressing such problems and filling a discharge material into a minute defect portion of an object to be discharged to correct the defect portion. For the purpose. Means for solving the problem

[0005] In order to achieve the above object, a dispenser according to a first aspect of the present invention is a container that contains a discharge material for correcting a defective portion of a discharge target, and a discharge material attached to the tip of the container. A dispenser comprising: a discharge needle that discharges to the defective portion; and a discharge control unit that applies a positive pressure to the discharge material in the container and discharges the discharge material from the discharge needle. The softened glass pipe is stretched to make the needle tip thinner than the needle body.

With such a configuration, a discharge material for correcting a defective portion of a discharge object is accommodated in the container, a positive pressure is applied to the discharge material in the container by the discharge control means, and the container is attached to the tip of the container. Then, the glass pipe whose tip is heated and softened is stretched, and the discharge material is discharged from the discharge needle formed in a shape thinner than the needle body to the defective portion. As a result, it is possible to fill the discharge object into the minute defect portion of the discharge object.

[0007] Further, the defect correction method according to the second invention is a container for storing a discharge material for correcting a defective portion of a discharge target object, and discharges the discharge material attached to the tip of the container to the defective portion. Using a dispenser comprising a discharge needle to be discharged and a discharge control means for applying a positive pressure to the discharge material in the container to discharge the discharge material from the discharge needle, the defective portion of the discharge target is corrected A defect correction method, wherein the defective portion is trimmed with a preset trimming size based on a discharge amount and a coating thickness of a discharge material discharged from the dispenser, and a predetermined amount of discharge is applied to the trimmed defect portion. The material is discharged.

[0008] Further, the defect correction method according to the third aspect of the invention includes a container for storing a discharge material for correcting a defective portion of a discharge target object, and discharging the discharge material attached to the tip of the container to the defective portion. Using a dispenser comprising a discharge needle to be discharged and a discharge control means for applying a positive pressure to the discharge material in the container to discharge the discharge material from the discharge needle, the defective portion of the discharge target is corrected A defect correction method, wherein one of a plurality of trimming sizes set in advance for trimming the defective portion is selected according to the size of the defective portion, the defective portion is trimmed, and the trimming is performed. The ejection material is ejected to the defective portion by the number of ejections set in advance according to the selected trimming size.

[0009] In addition, the discharge needle of the dispenser stretches the heat-softened glass pipe. The needle tip is formed in a shape thinner than the needle main body. As a result, the glass pipe with the needle tip heated and softened is stretched to discharge the dispenser needle force of the dispenser formed in a shape thinner than the needle main body, and the discharge material is discharged to the minute defect portion of the discharge target object.

[0010] Further, the discharge material is an ultraviolet curable resin that is cured by irradiation with ultraviolet rays. As a result, the defective part is filled and corrected with an ultraviolet curable resin that is cured by irradiation with ultraviolet rays.

[0011] The discharge object is a color filter substrate. As a result, the defect of the color filter on the color filter substrate is corrected.

The invention's effect

[0012] According to the inventions according to claims 1 and 4, the discharge pipe having an inner diameter D of several μ ΐη to several tens of μ により η is obtained by extending the glass pipe obtained by heating and softening the discharge needle to form a thin needle tip. The needle can be easily formed. Accordingly, it is possible to discharge a small amount of the discharge material, and it is possible to correct a minute defect portion of the discharge object using the dispenser.

[0013] Further, according to the invention of claim 2, the defect portion is trimmed with a preset size based on the ejection amount and the coating thickness of the ejection material ejected from the dispenser. By discharging a predetermined amount of the discharge material to the defective portion, it is possible to always perform trimming with a constant size regardless of the size of the defect portion and to fill the discharge material. Therefore, the defect correction work becomes simple and the time for the correction work can be shortened.

[0014] Further, according to the invention of claim 3, one of a plurality of trimming sizes set in advance for trimming the defective portion is selected according to the size of the defective portion, and the defective portion is selected. Trimming is performed, and the ejection material is ejected to the trimmed defect portion by the number of ejections set in accordance with the selected trimming size. It is possible to reduce the discharge amount of the discharge material by reducing the above. Accordingly, it is possible to suppress the amount of the discharge material used for defect correction. Further, when the defect portion is large, the trimming size can be increased and the number of discharges can be increased to fill the discharge material. As a result, it is possible to cope with trimming parts of different sizes with a single discharge needle.

[0015] Further, according to the invention of claim 5, the discharge material is cured by irradiation with ultraviolet rays. By using an ultraviolet curable resin, the volume change during curing can be suppressed to a few percent, and the coating thickness can be easily controlled.

[0016] According to the invention of claim 6, the color filter substrate of the liquid crystal display device can be corrected by using the discharge target as a color filter substrate.

Brief Description of Drawings

FIG. 1 is a conceptual diagram showing an embodiment of a dispenser according to the present invention.

FIG. 2 is a longitudinal sectional view showing a discharge needle of the dispenser.

FIG. 3 is a diagram showing the relationship between the inner diameter of a discharge needle, the discharge amount per discharge, and the number of discharges necessary to fill three different sizes of trimming portions.

FIG. 4 is a cross-sectional view of a color filter substrate for explaining a defect correcting method according to the present invention.

FIG. 5 is a plan view of a color filter substrate for explaining a defect correcting method according to the present invention. Explanation of symbols

[0018] 1 ... Container

2… Discharge needle

2a ... Needle tip

2b ... Needle body

3 ··· Discharge control means

4… Color UV curable resin (discharge material)

5… Colorfinoleta

11 ... Defects

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a conceptual diagram showing an embodiment of a dispenser according to the present invention. This dispenser is used to discharge a discharge material to a discharge target and correct a minute defect portion of the discharge target. The dispenser 1, the discharge needle 2, the discharge control means 3, It has.

[0020] The container 1 is a tank for storing a discharge material for correcting a defective portion of a discharge target. For example, when the discharge target is a color filter substrate, a color filter is used as the discharge material. The color UV curable resin 4 is stored. The color ultraviolet curable resin 4 is cured by irradiation with ultraviolet rays, and the volume change upon curing is several percent, so that the coating thickness can be easily controlled. In contrast, a thermosetting resin can also be used as the discharge material, but this thermosetting resin has a volume change upon curing of about 50%. About two times the coating thickness of the thermosetting resin must be discharged, and the thermosetting resin may overflow from the trimmed defect. Therefore, in the following description, a case where a color filter substrate is used as the discharge target and a color ultraviolet curable resin 4 is used as the discharge material will be described.

A discharge needle 2 is provided at the tip of the container 1. The discharge needle 2 is made of a glass pipe that discharges the color ultraviolet ray curable resin 4 to the defective portion 11 (see FIG. 4) of the color filter substrate. In this case, the amount of the color UV curable resin 4 necessary for correcting the defect of the color filter is 5 when the film thickness of the color filter is 2 μm and the trimming size is 50 μm 50/1 111, for example. / 1 111 100/1 Since it is a very small amount of 20 at 111, the discharge needle 2 stretches the glass pipe heated and softened as shown in Fig. 2, and the needle tip 2a is moved from the needle body 2b. Is also formed into a thin shape. When a glass pipe is softened by heating and stretched thinly, the inner diameter of the pipe decreases accordingly, and a thin needle tip 2a having an inner diameter D of several μm to several tens of μm can be easily formed.

[0022] FIG. 3 shows, for reference, the relationship between the inner diameter D of the discharge needle 2, the discharge amount V per discharge, and the number of discharges required to fill the three different size trimming parts. It is. The discharge amount V depends on the air pressure, discharge time, viscosity of the color UV curable resin 4, etc. Here, the color UV curable resin 4 at the length L of the needle tip 2a shown in FIG. This is calculated as that discharged in the discharge operation.

[0023] When the trimming size can be selected according to the size of the defect portion 11, when the selectable trimming size is, for example, 50 μm square, 70 μm square, and 100 μm square, the trim of each size is selected. The number of discharges that can be filled in the ming part is 3 µ π inside diameter D! Fig. 3 shows the discharge needle 2 of ~ 19 µm. In addition, the area A indicated by hatching in the figure is an area that cannot be applied because the color UV curable resin 4 overflows from the trimming part because the amount of discharge per one time is too large compared to the volume of the trimming part of the corresponding size. It is. Region B is also trimmed It is necessary to repeat the discharge 11 times or more to fill the part, which is an unfavorable region with a long tact.

[0024] According to FIG. 3, one discharge needle 2 can correspond to the trimming portions of the above three sizes. The discharge needle having an inner diameter D force of μm to 9 μm surrounded by a thick broken line in FIG. 2. Therefore, in this case, the discharge needle 2 is formed to have an inner diameter D force S6 x m to 9 x m of the needle tip 2a. The trimming size is, for example, 50 μm square when the size of the defect 11 is 30 xm ≤ S <50 xm, and 70 μm square when 50 μm ≤ S <70 xm. In addition, when 70 μm ≤ S <100 zm, the 100 zm angle is selected.

As shown in FIG. 1, a discharge control means 3 is connected to the container 1 via a piping tube 6. The discharge control means 3 applies a positive pressure to the color ultraviolet curable resin 4 stored in the container 1 and includes an air tank 7, a timer 8, an electromagnetic valve 9, and a flow control valve 10. Yes. Here, the air tank 7 temporarily stores air supplied from, for example, an air pump, and is connected to the electromagnetic valve 9 via the flow rate control valve 10. The timer 8 turns on the switch for a preset time to energize the solenoid valve 9, and the solenoid valve 9 opens and closes the valve when the energization is turned on or off. Thus, the discharge control means 3 opens the electromagnetic valve 9 for the time set in the timer 8, and the air temporarily stored in the air tank 7 is controlled through the pipe tube 6 while controlling the flow rate by the flow control valve 10. The color UV curable resin 4 is supplied to the container 1 by the positive pressure of the air introduced into the container 1 and operates to discharge an appropriate amount of the discharge needle 2 force of the container 1.

[0026] Thus, according to the dispenser of the present invention, the discharge needle 2 is made of glass pipe, and the heat-softened glass pipe is stretched to form the needle tip 2a to be thin, so that the inner diameter D is several μm. A discharge needle 2 of ˜several tens of xm can be easily formed. Accordingly, a small amount of the color ultraviolet curable resin 4 can be discharged, and a fine defect portion of the color filter can be corrected using the dispenser.

Next, a defect correcting method for correcting a defective portion of the color filter using the dispenser will be described with reference to FIG. 4 and FIG.

First, in the first step, for example, an objective lens of an observation CCD camera (not shown). Then, the defective portion is detected on the color filter, and the size of the defective portion is measured by, for example, a gauge provided in the objective lens.

In the second step, the trimming size is selected according to the size of the defective portion of the color filter 5. This selection is performed by selecting a slit through which the trimming laser beam passes. For example, when the defect size S is 30 μm ≤ S <50 xm, a 50 μm square slit, and when 50 111 ≤ 3 <70 111, a 70 xm square slit is added, and an additional 70 μm ≤ S. When <100 μm, a 100 μm square slit is selected.

[0029] In the third step, as shown in FIG. 4 (a), a laser beam 12 of, for example, 532 nm or 355 nm for trimming is irradiated for a predetermined time through the selected slit, The defective part 11 is trimmed and enlarged (see FIG. 5 (a)). This trimming is performed once in order to remove protrusions such as foreign matters adhering to the color filter 5 or to prevent the color UV curable resin 4 injected into the defective part 11 from overflowing from the defective part 11. This is performed in order to intentionally enlarge the defect portion 11 in consideration of the discharge amount of the color ultraviolet curable resin 4 discharged from the discharge needle 2.

In the fourth step, as shown in FIG. 4 (b), the needle tip 2 a of the discharge needle 2 is positioned on the defective portion 11. When a discharge start switch (not shown) is pressed in this state, the timer 8 of the discharge control means 3 shown in FIG. 1 operates and opens the electromagnetic valve 9 for a preset time. As a result, the compressed air is supplied from the air tank 7 to the container 1 through the piping tube 6 while the flow rate is adjusted by the flow control valve 10. Then, a positive pressure by air is applied to the color ultraviolet curable resin 4 in the container 1, and the color ultraviolet curable resin 4 is discharged from the discharge needle 2 to the trimmed defect portion 11 (see FIG. 5 (b)). In this case, for example, when a discharge needle 2 having an inner diameter D of 6 / im is used and a 50 xm square is selected as a trimming size in accordance with the size S of the defect portion 11, a single time as shown in FIG. When the 70 zm angle is selected, four discharge operations are performed, and when the 100 am angle is selected, ten discharge operations are performed.

In the fifth step, as shown in FIG. 4 (c), a laser beam 13 of, eg, 355 nm (ultraviolet) is irradiated for a predetermined time through the objective lens, and the power error discharged to the defect portion 11 is emitted. The UV curable resin 4 is cured (see Fig. 5 (c)). As a result, as shown in Fig. 4 (d) Then, the defect 11 is corrected (see Fig. 5 (d)).

[0032] In the second step, it is not necessary to select one of the three trimming sizes set in advance according to the size of the defective portion 11, and the discharge amount and the coating thickness for one time are known in advance. In this case, the trimming size calculated based on the discharge amount and the coating thickness may be always set regardless of the size of the defective portion 11. Specifically, for example, when a discharge needle 2 having an inner diameter D of 19 zm is used and the discharge volume per stroke is 19.8 pL as shown in FIG. 3, it depends on the size of the defect 11. You should always set the trimming size to 100 zm square. In this case, the trimming portion can be substantially filled with the color UV curable resin 4 by one discharge operation.

As described above, according to the defect correcting method of the present invention, one of a plurality of sizes set in advance for trimming the defective portion 11 can be selected according to the size of the defective portion 11. Thus, when the defect portion 11 is small, the trimming size can be reduced and the discharge amount of the color ultraviolet curable resin 4 can be reduced. Accordingly, the amount of the color ultraviolet curable resin 4 used for correcting the defect of the color filter 5 can be suppressed.

[0034] Further, since the color ultraviolet curable resin 4 is ejected as many times as the number of ejections set according to the trimming size, a single ejection needle 2 can cope with trimming parts of different sizes. it can.

[0035] Further, when the discharge amount and the coating thickness for one time are known in advance, the trimming size calculated based on the discharge amount and the coating thickness is always set regardless of the size of the defect portion 11. In this case, the defect correction work that does not require measurement of the size of the defect portion 11 is simplified. Therefore, it is possible to shorten the time for defect correction work.

As described above, the force described in the case where the color filter substrate is used as the discharge target is not limited to this, and the present invention can be applied to defect correction of a film such as a wiring circuit.

Claims

The scope of the claims

[1] A container for containing a discharge material for correcting a defective portion of a discharge target, a discharge needle attached to a tip of the container and discharging the discharge material to the defective portion, and a discharge material in the container A dispenser provided with a discharge control means for applying a positive pressure to discharge the discharge material from the discharge needle, wherein the discharge needle is formed by extending a heat-softened glass pipe so that the needle tip is narrower than the needle body A dispenser characterized in that it is formed.

[2] A container for containing a discharge material for correcting a defective portion of a discharge target, a discharge needle attached to a tip of the container and discharging the discharge material to the defective portion, and a discharge material in the container A defect correction method for correcting a defective portion of an object to be discharged using a dispenser that includes a discharge control unit that applies a positive pressure to discharge the discharge material with the discharge needle force, and is discharged from the dispenser Trimming the defective portion with a preset trimming size based on the discharge amount and coating thickness of the discharge material,

Discharging a predetermined amount of the discharge material to the trimmed defect,

The defect correction method characterized by the above-mentioned.

[3] A container for containing a discharge material for correcting a defective portion of a discharge target, a discharge needle attached to the tip of the container and discharging the discharge material to the defective portion, and a discharge material in the container A defect correction method for correcting a defective portion of a discharge target object using a dispenser that includes a discharge control unit that applies a positive pressure to discharge the discharge material from the discharge needle, and trims the defective portion Therefore, one of a plurality of trimming sizes set in advance is selected according to the size of the defective portion, and the defective portion is trimmed.

The ejection material is ejected to the trimmed defect portion by the number of ejections set in advance according to the selected trimming size.

The defect correction method characterized by the above-mentioned.

4. The defect correcting method according to claim 2, wherein the discharge needle of the dispenser is formed by extending a heat-softened glass pipe so that the tip of the needle is thinner than the needle body. 5. The defect correcting method according to claim 2, wherein the discharge material is an ultraviolet curable resin that is cured by irradiation with ultraviolet rays.

6. The defect correcting method according to claim 2, wherein the discharge target is a color filter substrate.