KR101184431B1 - Method for correcting defect - Google Patents

Abstract

A container 1 accommodating the colored ultraviolet curable resin 4 for correcting the defective part of the color filter substrate, and attached to the tip of the container 1 to discharge the colored ultraviolet curable resin 4 to the defective part. The discharge control means 3 which applies positive pressure to the discharge needle 2 and the color ultraviolet curable resin 4 in the said container 1, and discharges the said color ultraviolet curable resin 4 from the discharge needle 2, As a dispenser provided, the discharge needle 2 is formed by thinly extending the heat-softened glass pipe to form the tip of the needle in a shape thinner than the needle body portion. Thereby, it becomes possible to fill a discharge material with a minute defect part of a discharge object, and to correct the said defect part.

Dispenser, Color UV Curing Resin, Color Filter

Description

How to fix the defect {METHOD FOR CORRECTING DEFECT}

The present invention relates to a dispenser for correcting a defect of the discharge object by discharging the discharge material to the discharge object and a defect correction method. Specifically, the softened glass pipe is elongated to form the tip of the discharge needle thinner than the needle body. The present invention relates to a dispenser and a defect correction method in which a discharge material is filled in a minute defective portion of an object to be discharged to correct the defective portion.

As a conventional defect correction method of this kind, for example, as a defect correction method of a color filter for a liquid crystal display device, a yag laser is irradiated to a defect portion on a color filter to trim and enlarge the defect portion, and the trimming is performed. The defective part was filled with the color ultraviolet curable resin for correction by a dispenser, the ultraviolet ray was irradiated, the color ultraviolet curable resin was cured, and the defect part was corrected (for example, refer to Patent Document 1).

Patent Document 1: Japanese Unexamined Patent Publication No. Hei 6-109919

However, since the dispenser used in such a conventional defect correction method generally uses a discharge needle made of stainless steel, the minimum internal diameter of the needle that can be formed was about 100 μm, and the minimum discharge amount was about 1 μl. . On the other hand, since the amount of the color UV-curable resin required for the correction of the trimmed minute defects of the color filter is about 5 pL to 20 pL, the amount of the trimmed defects is reduced when the discharge needle made of conventional stainless steel is used. There was a problem that the color ultraviolet curable resin overflowed. Therefore, a defect correction method using a dispenser has not been put to practical use.

Accordingly, an object of the present invention is to provide a dispenser and a defect correction method for correcting the defective portion by filling the discharge material in the minute defective portion of the discharge object.

In order to achieve the above object, the dispenser according to the present invention includes a container for holding a discharge material for correcting a defective portion of the discharge object, a discharge needle provided at the tip of the container to discharge the discharge material to the defective portion, A dispenser having a discharge control means for imparting a positive pressure to the discharge material in the container to discharge the discharge material from the discharge needle, wherein the discharge needle thinly extends the heat-softened glass pipe to pierce the needle tip. It is formed in a shape thinner than wealth.

With such a configuration, a discharge material for correcting a defective portion of the discharge object is accommodated in the container, a positive pressure is applied to the discharge material in the container by discharge control means, mounted on the tip of the container, and the needle tip is heated and softened. The glass pipe is elongated to discharge the discharge material from the discharge needle formed in a shape thinner than the needle body portion. This makes it possible to charge the discharge material to the minute defective portion of the discharge object.

In addition, the defect correction method according to the present invention includes a container accommodating a discharge material for correcting a defective portion of a discharge object, a discharge needle attached to the tip of the container to discharge the discharge material to the defect portion, A defect correction method of correcting a defective portion of an object to be discharged by using a dispenser having a discharge control means for applying a positive pressure to a discharge material to discharge the discharge material from the discharge needle, wherein a single discharge operation is performed from the discharge needle of the dispenser. The defective portion is trimmed and enlarged at a trimming size set in advance based on the discharge amount and the coating thickness of the discharged material discharged by the discharged material, and the discharged material is discharged by one discharge operation from the discharge needle on the trimmed enlarged defective portion.

In addition, the defect correction method according to the present invention includes a container accommodating a discharge material for correcting a defective portion of a discharge object, a discharge needle attached to the tip of the container to discharge the discharge material to the defect portion, A defect correction method for correcting a defective portion of an object to be discharged by using a dispenser having a discharge control means for applying a positive pressure to a discharge material to discharge the discharge material from the discharge needle, wherein the size of the defective portion is measured and the size is different. Selecting one of a plurality of rectangular-shaped trimming sizes according to the size of the defective portion to trim the defective portion, and discharging the discharge material by a predetermined number of discharges according to the selected trimming size with respect to the trimmed defective portion; .

In addition, the discharge needle of the dispenser is formed in a shape in which the tip of the needle is thinner than the needle body portion by increasing the heat-softened glass pipe. In this way, the discharge material is discharged from the discharge needle of the dispenser formed in a shape thinner than the needle body portion by elongating the glass pipe where the needle tip is heated and softened.

In addition, the discharge material is an ultraviolet curable resin cured by ultraviolet irradiation. Thereby, a defect part is filled and correct | amended with ultraviolet curable resin hardened | cured by irradiation of an ultraviolet-ray.

The discharge object is a color filter substrate. This corrects the defect of the color filter of the color filter substrate.

Effects of the Invention

According to the present invention, by elongating the glass pipe obtained by heat-softening the ejection needle, the tip of the needle is tapered, the ejection needle having an inner diameter D of several micrometers to several tens of micrometers can be easily formed. Therefore, it is possible to discharge a small amount of the discharging material, and the minute defect portion of the discharge object can be corrected by using the dispenser.

Further, according to the present invention, the defect portion is trimmed to a predetermined size based on the discharge amount and the coating thickness of the discharge material discharged from the dispenser, and a predetermined amount of the discharge material is discharged to the trimmed defect portion, thereby relating to the size of the defect portion. It can always be trimmed to a constant size without filling the discharge material. Therefore, the defect correction operation can be simplified, and the time taken for the correction operation can be shortened.

Further, according to the present invention, in order to trim a defective part, one of a plurality of preset trimming sizes is selected according to the size of the defective part to trim the defective part, and the discharge set according to the selected trimming size for the trimmed defective part. By discharging the discharge material by the number of times, when the defect portion is small, the trimming size can be reduced to reduce the discharge amount of the discharge material. Therefore, the usage-amount of the discharge material used for defect correction can be suppressed. When the defect portion is large, the trimming size can be increased, and the discharge number can be increased to fill the discharge material. Thereby, it can respond also to the trimming part of another size with one discharge needle.

Moreover, according to this invention, by using the ultraviolet curable resin hardened | cured by irradiation of an ultraviolet-ray as a discharge material, the volume change at the time of hardening can be suppressed to several%, and coating thickness adjustment becomes easy.

Moreover, according to this invention, defect correction of the color filter of a liquid crystal display device can be performed by making a discharge object into a color filter substrate.

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

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 the discharge needle, the discharge amount per stroke, and the number of discharges required for filling the trimming sections of three different sizes.

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

It is a top view of the color filter board | substrate explaining the defect correction method by this invention.

** Description of the symbols for the main parts of the drawings **

1 container

2 discharge needle

2a needle tip

2b needle body

3 discharge control means

4 color ultraviolet curing resin (discharge material)

5 color filters

11 defective parts

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail based on an accompanying drawing.

1 is a conceptual diagram showing an embodiment of a dispenser according to the present invention. The dispenser is used to discharge the discharge material to the discharge target and to correct the minute defects of the discharge target. The dispenser includes a container 1, a discharge needle 2, and a discharge control means 3. .

The container 1 is a tank for storing a discharge material for correcting a defective portion of the discharge object. For example, when the discharge object is a color filter substrate, the color ultraviolet curable resin 4 of the color filter is stored as the discharge material. . This color ultraviolet curable resin 4 is hardened | cured by irradiation of an ultraviolet-ray, and since the volume change at the time of hardening is several%, application | coating thickness control is easy. On the other hand, a thermosetting resin can also be used as the discharge material, but since the thermosetting resin has a volume change of about 50%, the thermosetting resin needs to be discharged about twice the coating thickness in order to obtain a predetermined hood thickness. There exists a possibility that a thermosetting resin may overflow from the trimmed defect part. Therefore, in the following description, the case where a color filter substrate is used as a discharge object and the color ultraviolet curable resin 4 is used as a discharge material is demonstrated.

A discharge needle 2 is provided at the tip end of the container 1. This discharge needle 2 is produced by the glass pipe which discharges the color ultraviolet curable resin 4 to the defect part 11 (refer FIG. 4) of a color filter substrate. In this case, the amount of the color ultraviolet curable resin 4 required for the defect correction of the color filter is 2 μm in the film thickness of the color filter, and 5 pL and 100 μm × when the trimming size is 50 μm × 50 μm, for example. Since the discharge needle 2 has a small amount of 20 pL at 100 µm, the discharge needle 2 is thinly stretched by heat-softening the glass pipe to form the needle tip 2a in a shape thinner than the needle body portion 2b. Doing. When the glass pipe is heat-softened and elongated, the inner diameter of the pipe is also reduced, whereby the thin needle tip 2a having an inner diameter D of several micrometers to several tens of micrometers can be easily formed.

FIG. 3 shows for reference the relationship between the inner diameter D of the discharge needle 2 and the discharge amount per stroke V and the number of discharges required for filling the trimming parts of three different sizes. The discharge amount V varies depending on the air pressure, the discharge time, the viscosity of the color ultraviolet curable resin 4, and the like, but here, the color ultraviolet curable resin 4 in the length L portion of the needle tip 2a shown in FIG. Is calculated as being discharged in one discharge operation.

When the size of the trimming can be selected according to the size of the defect portion 11, when the selectable trimming size is, for example, 50 μm, 70 μm and 100 μm, the trimming part of each size The number of discharges that can be filled is shown in FIG. 3 for the discharge needle 2 having an inner diameter D of 3 µm to 19 µm. In addition, the area | region A shown with an oblique line in FIG. 3 is an area | region which cannot apply because the color ultraviolet curable resin 4 overflows from the trimming part because 1 time discharge amount is too large compared with the volume of the trimming part of a corresponding size. In addition, the area B needs to be repeated 11 or more times in order to fill each trimming part, and the tact time is long, which is undesirable.

According to FIG. 3, one discharge needle 2 can correspond to the trimming parts of the three sizes. The discharge needle 2 having an inner diameter D enclosed by a thick broken line in FIG. 3 is 6 μm to 9 μm. . Therefore, in this case, the discharge needle 2 is formed such that the inner diameter D of the needle tip 2a becomes 6 µm to 9 µm. The trimming size may be, for example, a 50 μm angle when the size of the defect portion 11 is 30 μm ≦ S <50 μm, and a 70 μm angle when 50 μm ≦ S <70 μm, or 70 μm ≦ S When it is <100 mu m, the angle of 100 mu m is selected.

As shown in FIG. 1, the discharge control means 3 is connected to the container 1 with a pipe tube 6 interposed therebetween. The discharge control means 3 acts on the color ultraviolet curable resin 4 stored in the container 1 by positive pressure. The air tank 7, the timer 8, the solenoid valve 9 and the flow control valve (10) is provided. At this time, the air tank 7 temporarily stores air supplied from the air pump, for example, and is connected to the solenoid valve 9 with the flow control valve 10 interposed therebetween. In addition, the timer 8 turns on the switch for a predetermined time and energizes the solenoid valve 9 so that the solenoid valve 9 opens and closes the valve by turning on or off the energization. Thereby, the discharge control means 3 opens the solenoid valve 9 for the time set by the timer 8, and piping while controlling the flow volume of the air temporarily stored in the air tank 7 by the flow control valve 10. FIG. The colored ultraviolet curable resin 4 is discharged from the discharge needle 2 of the container 1 by the positive pressure of air introduced into the container 1 through the tube 6. It works.

As described above, according to the dispenser of the present invention, the discharge needle 2 is made of a glass pipe, the heat-softened glass pipe is elongated to form a thin needle tip 2a, whereby the inner diameter D is several micrometers to several tens of micrometers. The discharge needle 2 can be easily formed. Therefore, discharge of a trace amount of color ultraviolet curable resin 4 becomes possible, and the correction of the minute defect part of a color filter using a dispenser becomes possible.

Next, a defect correction method for correcting the defective portion of the color filter using the dispenser will be described with reference to FIGS. 4 and 5.

First, in a 1st step, the defect part on a color filter is detected through the objective lens of the observation CCD camera, for which illustration is abbreviate | omitted, and the magnitude | size of a defect part is measured by the gauge provided in the objective lens, for example.

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 made by selecting the slit through which the trimming laser beam passes. For example, when the size S of the defect portion is 30 µm ≤ S <50 µm, the slit of 50 µm angle is 70 µm slit when 50 µm ≤ S <70 µm, and 70 µm ≤ S <D0 In the case of 占 퐉, the slit of the 100 占 퐉 angle is selected.

In the third step, as shown in FIG. 4A, the laser beam 12 for trimming, for example, for 532 nm or 355 nm is irradiated to the defect portion 11 for a predetermined time through the selected slit. The part 11 is trimmed and becomes large (refer FIG. 5A). This trimming is performed once in order to remove projections such as foreign matters attached on the color filter 5 or to prevent the color UV-curable resin 4 injected into the defect 11 from overflowing from the defect 11. In order to intentionally enlarge the defective part 11 in consideration of the discharge amount of the color ultraviolet curing resin 4 discharged from the discharge needle 2 by a discharge operation | movement.

In the fourth step, as shown in FIG. 4B, the needle tip 2a of the discharge needle 2 is positioned at the defective portion 11. When the discharge start switch (not shown) is pressed in this state, the timer 8 of the discharge control means 3 shown in FIG. 1 operates to open the solenoid valve 9 for a preset time. Thereby, compressed air is supplied to the container 1 via the piping tube 6, adjusting the flow volume from the air tank 7 to the flow control valve 10. FIG. In addition, positive pressure by air is imparted to the color ultraviolet curable resin 4 in the container 1, and the color ultraviolet curable resin 4 is discharged to the defective portion 11 trimmed from the discharge needle 2 (FIG. 5B). Reference). In this case, when the 50 micrometer angle is selected as trimming size according to the size S of the defect part 11 using the discharge needle 2 whose internal diameter D is 6 micrometers, it is shown in FIG. As described above, one ejection operation is executed, four ejection operations are performed when the 70 µm angle is selected, and 10 ejection operations are executed when the 100 µm angle is selected.

In the fifth step, as shown in Fig. 4C, through the objective lens, for example, the colored ultraviolet curable resin discharged to the defect portion 11 by irradiating the laser beam 13 of 355 nm (ultraviolet ray) for a predetermined time ( 4) is cured (see FIG. 5C). Thereby, as shown in FIG. 4D, the correction of the defect part 11 is completed (refer FIG. 5D).

In the second step, one of the three trimming sizes set in advance is not selected in accordance with the size of the defective portion 11, but the size of the defective portion 11 is known in advance when the discharge amount and the coating thickness are known in advance. Irrespective of this, the trimming size calculated based on the discharge amount and the coating thickness may be set at all times. Specifically, for example, when the discharge needle 2 having an inner diameter D of 19 µm is used, one discharge amount is 19.8 pL, as shown in FIG. Irrespective of this, the trimming size may be set at 100 µm at all times for trimming. In this case, the trimming part can be almost filled with the color ultraviolet curing resin 4 by one discharge operation.

As described above, according to the defect correction method of the present invention, the defect portion 11 is selected by selecting one of a plurality of sizes preset in order to trim the defect portion 11 according to the size of the defect portion 11. In the case where the trimming size is small, the discharge amount of the color ultraviolet curing resin 4 can be reduced. Therefore, the usage-amount of the color ultraviolet curing resin 4 used for the defect correction of the color filter 5 can be suppressed.

Further, by discharging the colored ultraviolet curable resin 4 by the number of discharges set according to the trimming size, it is possible to cope with trimming parts of different sizes with one discharge needle 2.

When the discharge amount and the coating thickness of 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, and the size of the defective portion 11 is measured. There is no need to do this, and defect correction is simplified. As a result, the time required for correcting defects can be shortened.

As mentioned above, although the case where a color filter substrate was used as a discharge object was demonstrated, it is not limited to this, For example, it can apply also to the defect correction of a film, such as a wiring circuit.

Claims (6)

delete A container for accommodating a discharge material for correcting a defective portion of the discharge object, a discharge needle attached to the tip of the container to discharge the discharge material to the defective portion, and a positive pressure applied to the discharge material in the container, the discharge material A defect correction method of correcting a defective portion of an object to be discharged by using a dispenser having a discharge control means for discharging the discharge from the discharge needle, The defect portion is trimmed and enlarged at a preset trimming size based on the discharge amount and the coating thickness of the discharge material discharged by the one discharge operation from the discharge needle of the dispenser, and is discharged once from the discharge needle on the enlarged defective portion. And a discharge material discharged by the operation. A container for accommodating a discharge material for correcting a defective portion of the discharge object, a discharge needle attached to the tip of the container to discharge the discharge material to the defective portion, and a positive pressure applied to the discharge material in the container, the discharge material A defect correction method of correcting a defective portion of an object to be discharged by using a dispenser having a discharge control means for discharging the discharge from the discharge needle, The size of the defective portion is measured, and any one of a plurality of trimming sizes having a different rectangular shape is selected according to the size of the defective portion to trim the defective portion, and according to the selected trimming size in advance for the trimmed defective portion. And discharging the discharge material by a set number of discharges. The method of claim 3, The discharge needle of the dispenser is a defect correction method characterized in that the needle tip is formed in a taper shape than the needle body portion by increasing the heat-softened glass pipe. The method according to claim 3 or 4, The discharge material is a defect correction method, characterized in that the ultraviolet curable resin cured by ultraviolet irradiation. The method according to claim 3 or 4, And the discharge object is a color filter substrate.

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