JPH06324295A - Device for correcting color filter - Google Patents

Abstract

PURPOSE:To well correct the defective parts (decolored parts) of a color filter substrate and to efficiently correct these parts without the request for much skill in operation. CONSTITUTION:The color filter substrate 3 is placed on an X-Y table 2. A colored photosensitive dry film 7 from a supply reel 9 to a take-up reel 10 is arranged in the state of opposing this film to the color filter substrate by guide rollers 11, 12. A first press-contacting unit 14 having an elastic member 13c heated by a heater 14b is disposed below the color filter substrate 3 and a second press-contacting unit 15 having a bobbin-shaped elastic member 15 heated by a heater 15b is disposed above the colored photosensitive dry film 7. Both press-contacting units 14, 15 are extended and the colored photosensitive dry film 7 is brought into pressurized contact under heating with the defective part (decolored part) 3c of the color filter substrate 3 by both elastic members 14c, 15c and is rapidly cooled by a cooling gas from a cooling gas nozzle 16a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter repairing device for repairing defects (color loss) occurring in a color filter in a manufacturing process of a color filter which is a basic component of a color liquid crystal panel.

[0002]

2. Description of the Related Art Recently, a color liquid crystal panel, which has been used in various fields, has a method of incorporating a color filter in order to perform color display, and the color filter is an important part of the color liquid crystal panel. .

There are various methods for producing a color filter, such as a dispersion method and a dyeing method.
It has excellent cost and is widely used. It is R,
Apply a resist solution containing G and B dye materials, expose,
It is manufactured by repeating the process of developing, or is disclosed in JP-A-61-279802 or JP-A-2-24400.
This is because the color filter can be easily manufactured, for example, by the transfer method as disclosed in Japanese Patent No. 5 publication.

One liquid crystal panel has a size of about 10 inches and about 900,000 picture elements, and it is very difficult to manufacture a complete color filter due to factors such as dust. Therefore, it is general to repair the defective portion (color loss) in the completed color filter.

In correcting a defective portion (color loss) of a color filter, foreign matter is removed by irradiation with a laser beam together with a filter constituent substance in the vicinity thereof as disclosed in JP-A-62-191804. The correction is performed by applying a resist solution to the tip of a needle and applying it to a defective portion under a microscope.

[0006]

However, it is difficult to control the filter thickness by the above method,
The display quality becomes uneven due to the variation of the light transmittance of the corrected portion. In addition, the work of applying the resist solution only to the necessary portions requires a high degree of skill, resulting in a decrease in production efficiency and an increase in cost.

The present invention was devised in view of such circumstances, and can correct a defective portion (color loss) without deteriorating the display quality, and does not require much skill in the work. The purpose is to be able to fix it efficiently.

[0008]

A color filter repairing apparatus according to the present invention comprises an XY table to which a color filter substrate can be removably attached and a state in which the color filter substrate on the XY table faces the XY table. A film supply unit for arranging a colored photosensitive dry film for feeding and winding, a first pressure-bonding unit for withdrawing from one side of the color filter substrate and abutting against the color filter substrate at a fixed position, and this first Secondly facing the pressure-bonding unit in the direction in which the color-sensitive photosensitive dry film is exposed and retracted from one side of the colored photosensitive dry film to press the colored photosensitive dry film to pressure-bond the defective portion on the color filter substrate.
And a heater for supplying heat to at least one of the first crimping unit and the second crimping unit, and the heating and crimping portion of the colored photosensitive dry film for the defective portion is cooled. And a cooling unit for controlling the temperature.

[0009]

The XY table is moved and positioned so that the defective portion (color loss) on the color filter substrate corresponds to the position of the first pressure bonding unit. Then, the colored photosensitive dry film is pressure bonded to the defective portion of the color filter substrate by projecting the first pressure bonding unit and the second pressure bonding unit. At this time, heat is supplied from the heater to the crimping part,
The colored photosensitive dry film is heated and pressure-bonded to the defective portion to have strong adhesion. The heating and pressure bonding portion is cooled by the cooling unit to quickly complete the pressure bonding. When the pressure bonding is completed, the first and second pressure bonding units are retracted to transfer the colored photosensitive dry film to the defective portion, and the film supply unit is operated to unwind and wind the colored photosensitive dry film. Proceed to the correction for the defective part of

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a color filter correction device according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partially cutaway front view showing a schematic structure of a color filter correction device according to an embodiment. A hollow XY table 2 which is horizontally movable in two-dimensional directions including an X direction and a Y direction perpendicular to the X direction is mounted on a base 1. The XY table 2 is mounted on an upper mounting surface of the XY table 2. The color filter substrate 3 can be detachably attached. A column 4 is erected on the base 1 at an outer position of the XY table 2, a horizontal frame 5 is spanned between upper portions of the column 4, and a mounting plate 6 is provided at a central portion of the horizontal frame 5. The mounting plate 6 has a film supply unit 8 for unwinding and winding the correction colored photosensitive dry film 7 sliced in a small width.
Is attached. This film supply unit 8
Is a supply reel 9, a take-up reel 10, and a supply reel 9
And a pair of guide rollers 11 and 12 for horizontally guiding the colored photosensitive dry film 7 fed out from the color filter substrate 3 and a tension roller 13 for loosening the colored photosensitive dry film 7. ing.

At a fixed position in the center of the base 1, a first pressure-bonding unit 14 is mounted which is vertically retracted below the color filter substrate 3 and comes into contact with the color filter substrate 3 by a protrusion. In addition, above the first pressure bonding unit 14, the pair of guide rollers 11, 12 are provided.
A second pressure-bonding unit 15 that vertically moves above and below the colored photosensitive dry film 7 and presses the colored photosensitive dry film 7 downward to pressure-bond a defective portion (color loss) in the color filter substrate 3 It is attached to the mounting plate 6.

FIG. 2 shows a first and second crimping unit 1.
It is an enlarged front view of 4,15. First crimping unit 14
Is an actuator 14a that moves up and down, and a heater 14b attached to the protruding / retracting portion of the actuator 14a.
And an elastic member 14c having a flat surface portion attached to the upper side of the heater 14b via the substrate. The first pressure-bonding unit 14 is also referred to as a base heater unit because it is provided on the base 1 side and includes a heater 14b that applies heat to the elastic member 14c. The second crimping unit 15 includes an actuator 15a that moves up and down,
The actuator 15a includes a heater 15b attached to the protruding / retracting portion, and a spindle-shaped elastic member 15c attached below the heater 15b via a substrate.
This second crimping unit 15 is on the upper side and is provided with the elastic member 1.
It is also referred to as a head heater unit because it has a heater 15b for applying heat to 5c. Flat elastic member 14
The axis of c and the axis of the spindle-shaped elastic member 15c coincide. Both elastic members 14c and 15c are made of silicone rubber or the like. Both heaters 14b and 15b have a predetermined temperature, that is, several tens of degrees Celsius to 150 degrees Celsius, preferably 1
The temperature is adjusted to be 00 ° C to 130 ° C. The heaters are preferably provided in both pressure bonding units, but either one may be used.

On the base 1, both elastic members 14c and 15 are provided.
The cooling unit 16 having the cooling gas nozzle 16a for supplying the cooling gas toward the heating and press-bonding portion by c, and the camera unit 17 for confirming the position of the defective portion (color loss) in the color filter substrate 3 and the correction situation. Is installed.

FIG. 3 is a block diagram showing a control system. The control system is divided into a color filter inspection device A and a color filter correction device B. The color filter inspection device A includes an image processing unit 18 connected to a camera unit 17, an inspection device main control unit 19, and a table control. And unit 20. Color filter correction device B
Is composed of a correction device main control unit 21 connected to the inspection device main control unit 19, an actuator control unit 22, and the table control unit 20.

Next, the operation will be described. The color filter inspection device A controls the table control unit 20 by the inspection device main control unit 19 to control the XY table 2.
Is driven to pick up an image of the color filter substrate 3 placed on the XY table 2 in a position-regulated state by the camera unit 17, and whether there is a defective portion (color loss) on the color filter substrate 3 in the image processing unit 18. If there is a defective portion, the position is stored. The position data of the defective portion is sent to the repair device main control unit 21, and the repair device main control unit 21 controls the table control unit 20 to drive the XY table 2, and the defective portion is connected to the first crimping unit 14. It is adjusted so that it is on the common axis with the second crimping unit 15. Note that such alignment may be performed manually.

The correction operation for the defective portion after the alignment will be described with reference to FIGS. 4 (a) to 4 (e). First
And each heater 14 of the second crimping unit 14, 15
b and 15b are heated to 100 ° C to 130 ° C. The elastic member 15c of the second upper pressure-bonding unit 15 is in contact with the colored photosensitive dry film 7 and preheats the colored photosensitive dry film 7. The colored photosensitive dry film 7 is composed of a base film portion 7a and a resist portion 7b. The elastic member 14c of the lower first pressure bonding unit 14 is separated from the color filter substrate 3.
The actuator 14a of the first pressure-bonding unit 14 extends and the flat elastic member 14c rises to come into contact with the lower surface of the color filter substrate 3 ((b) of FIG. 4). The color filter substrate 3 includes a glass substrate 3a and a color filter portion 3b.
And a defective portion (color loss) 3c is generated in the color filter portion 3b. The defective portion 3c has both elastic members 1
Located on the common axis of 4c and 15c, the defective portion 3c
The elastic member 14c comes into contact with the glass substrate 3a immediately below. When the elastic member 14c contacts the glass substrate 3a, the glass substrate 3a is heated to 100 ° C to 130 ° C.

Next, the actuator 15a of the second crimping unit 15 extends and the spindle-shaped elastic member 15c descends. Along with the lowering, the colored photosensitive dry film 7 is bent in an inverted shape, and its tip portion abuts on the defective portion 3c of the color filter substrate 3. The colored photosensitive dry film 7 is pressed against the defective portion 3c of the color filter substrate 3 by the elastic members 14c and 15c which are both heated, so that they are thermocompression bonded (FIG. 4).
(C)). Since the elastic member 15c that presses the colored photosensitive dry film 7 has a spindle shape, its adhesion is high.

Still, since it is elastically pressure-bonded, the color filter substrate 3 and the colored photosensitive dry film 7 are not damaged.

After thermocompression bonding, the actuator 14a of the lower first pressure bonding unit 14 contracts and the elastic member 14c descends. Then, the cooling unit 16 is driven and a low-temperature clean air or a cooling gas such as N ₂ gas is blown from the cooling gas nozzle 16a toward the heating press-bonding portion from below. As a result, the heat-bonding portion is rapidly cooled, and the defective portion 3
In c, the adhesiveness of the resist portion 7b of the colored photosensitive dry film 7 to the glass substrate 3a of the color filter substrate 3 is increased, and both are firmly fixed ((d) of FIG. 4).

When the fixing is completed, the cooling gas nozzle 16a
The blowing of the cooling gas from is stopped. Then, since the actuator 15a of the upper second pressure bonding unit 15 contracts and the spindle-shaped elastic member 15c rises, the colored photosensitive dry film 7 separates from the color filter substrate 3 and becomes horizontal. The transfer of the resist portion 7b to the defective portion 3c is performed ((e) of FIG. 4). The colored photosensitive dry film 7 is the take-up reel 1
It is wound up by 0. By exposing and developing the transferred portion of the resist portion 7b from the back surface, the correction of the defective portion 3c is completed.

In repairing the defective portion (color loss) 3c of the color filter substrate 3, the resist portion 7b of the colored photosensitive dry film 7 is thermocompression-bonded to the defective portion 3c. Therefore, the corrected filter thickness is the resist portion. The predetermined thickness is uniquely determined by the thickness of 7b, and the thickness accuracy is high. The skill required to apply a resist solution as in the conventional example is not required.
As described above, since the defective portion 3c can be efficiently corrected, the yield can be improved and the cost can be reduced.

[0023]

As described above, according to the present invention, in order to repair the defective portion (color loss) of the color filter substrate, the colored photosensitive dry film is heated and pressure-bonded to the defective portion. Since the filter thickness after correction is uniquely determined by the thickness of the colored photosensitive dry film, the control of the filter thickness becomes easy and the display quality becomes good. Further, the skill of the operator is not required so much for the heating and pressure bonding of the color filter substrate and the colored photosensitive dry film by the first and second pressure bonding units and the heater, so that the production efficiency is good and the cost is reduced. You can

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a schematic configuration of a color filter correction device according to an embodiment of the present invention.

FIG. 2 is an enlarged front view of first and second crimping units in the embodiment.

FIG. 3 is a block diagram showing a control system in the embodiment.

FIG. 4 is an operation explanatory diagram of the embodiment.

[Explanation of symbols]

 2 ... XY table 3 ... Color filter substrate 3a ... Glass substrate 3b ... Color filter part 3c ... Defect (color loss) 7 ... Colored photosensitive dry film 7a ... Base film part 7b. Registration unit 8 ...... Film supply unit 9 ...... Supply reel 10 ...... Take-up reel 11, 12 ...... Guide roller 14 ...... First crimping unit 14a ...... Actuator 14b ...... Heater 14c ...... Elastic member 15 ...... Second crimping unit 15a ... Actuator 15b ... Heater 15c ... Elastic member 16 ... Cooling unit 16a ... Cooling gas nozzle 17 ... Camera unit

Claims (1)

[Claims] 1. An XY table to which a color filter substrate can be removably attached, and a film in which a colored photosensitive dry film is arranged so as to face the color filter substrate on the XY table and is wound out and wound up. A supply unit; a first crimping unit that comes out of one side of the color filter substrate and abuts against the color filter substrate at a fixed position; A second crimping unit for pressing the colored photosensitive dry film out of one side of the photosensitive dry film to crimp it to a defective portion on the color filter substrate; the first crimping unit and the second crimping unit A heater for supplying heat to at least one of the pressure-bonded portions, and heating the colored photosensitive dry film for the defective portion A color filter repairing device comprising a cooling unit for cooling a crimping portion.