JPH08286022A - Transfer device for color filter - Google Patents

Abstract

PURPOSE: To excellently, precisely and efficiently transfer coloring material on transfer film on a substrate by providing a transfer film supply part, a transfer part and a discharging part at a position lower than a substrate carrying part. CONSTITUTION: The transfer film 111 from a supply part 16 is moved on the front face of the CCD camera 19 of an inspection part via a dancer roller 15. Next, the film 111 moves to the dancer roller 15'. A color filter glass substrate 13 is supplied, and the film 111 and the substrate 13 are held between a transfer roller 11 having the rugged releaf pattern of a picture element at the transfer part and a pressing roller 12 and are pressed. The film 111 transferred is taken up by a supporting film take-up part 110 through the dancer roller 15". The color filter substrate 13 is discharged from a discharge port after having a coloring layer formed. The devices are all attached at the position lower than the substrate carrying part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embossing transfer apparatus for manufacturing a color filter having colored pixels of a plurality of colors by using transfer films having different spectral characteristics on a support.

[0002]

2. Description of the Related Art As a manufacturing process of a liquid crystal color filter, various methods have been proposed in consideration of mass productivity and economical efficiency. Among them, a method in which a photosensitive resin is previously formed in a film shape as in Japanese Patent Laid-Open No. 63-187203, which is subsequently pressure-bonded by heat or the like and exposed and developed to obtain a colored pattern is proposed as a powerful method. Has been done. According to this method, since the coating film is formed in advance, the drying time at the time of coating is unnecessary, mass production adaptability is improved, and the photosensitive resin can be effectively used, which is economical. Rich However, the development process is still required, and further improvement centered on shortening the process has been desired. Among them, the “embossing transfer method” has been proposed as a powerful method. The “embossing transfer method” is a method in which a transfer roller having irregularities is directly transferred onto a substrate via a transfer paper to obtain a fine colored pattern, and a developing step is not necessary. Further, as the embossing transfer device for realizing this, the following devices have been proposed. After the transfer film is superposed on the substrate, the transfer material is adhered to the substrate via an adhesive layer by a pressing die formed on the plate cylinder (Japanese Patent Laid-Open No. 4-9).
No. 903 "Embossing transfer method"). The transfer film is a continuous film, and the pressing die is formed into a cylindrical shape so as to be easily manufactured continuously (Japanese Patent Laid-Open No. 4-100005, "Method for manufacturing color filter by transfer").

[0003]

However, the problems such as particle adhesion have not been solved in any of the transfer devices, which is insufficient in terms of yield countermeasures.
Therefore, it is an object of the present invention to provide an apparatus for transferring a coloring material on a transfer film to a glass substrate for a color filter with high quality, accuracy and efficiency.

[0004]

Therefore, as a result of studies to solve the above problems, the inventors have invented a transfer device for a color filter having the following means. First
As a means for transferring, a transfer film supply unit, a transfer unit for superimposing the transfer film and the substrate on each other to transfer the color filter pattern to the substrate by a transfer member, and a film after the transfer are discharged to a position lower than the substrate transport unit. Provided is a transfer device for a color filter, which is characterized in that a discharge part is provided. As a second means, the transfer device for the color filter according to the first means is characterized in that, in the transfer part, the transfer member is a transfer roller for transferring from a lower side of the substrate for the color filter. provide. As a third means, the transfer film of the transfer device according to the second means has a cylindrical embossing member on which a color filter pattern is formed, and the transfer film on the cylindrical embossing member of the transfer section. The second feature that a suction unit for sucking
And a transfer device for a color filter according to the above-mentioned means.
As a fourth means, a transparent substrate with an alignment mark on the camera side for aligning the color filter substrate and the embossing member is provided on the substrate transfer section according to the first to third means, and the mark. A detection camera and a position adjusting unit that adjusts the relative position based on a calculation result from a calculation control unit that calculates a relative position between the substrate and the embossing member based on a signal from the detection camera are provided. A transfer device for a color filter according to any one of the first to third means is provided.

[0005]

Embodiments of the present invention will be described below. FIG. 1 shows the main structure of an image transfer portion in an embodiment of the present invention. It will be described below based on this.
The transfer film 111 is set in the supply unit 16 of the apparatus as a continuous roll. The number of rolls in this supply unit 16 is 1.
Although it is a book, if the production efficiency is further improved, an auto paster capable of setting a plurality of rolls and automatically connecting films may be used. The transfer film 111 is composed of at least a colored film uniformly formed on a support film. The winding, which is the discharging unit 110, pulls the film from the supply unit of the transfer film. The transfer film 111 from the supply unit 16 reaches the inspection unit after passing through the first dancer roller 15 for tension control. A weight of 5 to 30 kilograms or the like is set for the dancer roller 15 for tension control, and the tension is kept constant by changing the position of the dancer roller. That is, the transfer film 111
When is strongly pulled, the dancer roller lowers the tension and goes down to the set value. On the contrary, when the transfer film is loosened, the dancer roller rises to increase the tension. And the CCD camera 1 of the inspection section
Move to the front of 9. Although not shown here, prior to the inspection, it is advantageous in terms of yield by blowing air onto the transfer film from both sides with a dust remover to remove dust, dirt, and the like. At this time, if a defective portion is detected, the defective transfer film is not transferred and is discharged as it is based on the position data. The transfer film 111 moves to the second dancer roller 15 'to be transferred to the glass substrate 13 for the color filter. At the same time, the glass substrate 13 is supplied from the substrate supply unit, and both of them are provided with the transfer roller 11 and the pressing roller 1 each having a relief pattern of uneven pixels in the transfer unit.
It is sandwiched by 2 and pressed. Generally, when the transfer film 111 is heated at a high temperature, the transfer film 111 stretches and it becomes difficult to adjust the tension.
However, the pressing roller 1 located opposite to the transfer roller 11
No. 2 is heated at 70 ° C to 170 ° C to keep the temperature of the glass substrate high and the temperature of the glass substrate 13 is kept at 70 ° C to 17 ° C.
It is effective to separately preheat to 0 ° C. and move to the transfer section. This is because when the temperature of the glass substrate 13 is not sufficiently raised, the transfer is insufficient, but when the transfer is performed only on the pattern portion to be transferred, the transfer film 111 is less likely to expand.

FIG. 2 shows the main components of an alignment apparatus for aligning a glass substrate and a constant relief pattern formed on a transfer roller in one embodiment of the present invention. In addition, FIG. 4 is a view of this from above. These operation mechanisms will be described below with reference to FIGS. 2 and 4. FIG.
In the above, the substrate 46 is transported onto the positioning device stand 44 by the transport rollers (not shown), and at this time, the pre-alignment operation is simultaneously performed. That is, the position of the substrate is roughly adjusted by swinging the “F” -shaped swing plate 45, which is the first positioning member in the left-right direction, in a direction orthogonal to the direction in which the substrate 46 advances. . The substrate 46 is positioned in the left-right direction by the conveyance roller group 41 having an inclination which is the second positioning member. The transport roller is shown in FIG.
As shown in FIG. 5, the distance between the pair of rollers is gradually narrowed such that d2> d1. Therefore, as the substrate is carried into the positioning member, the pre-alignment is completed at the predetermined position. The substrate for which the pre-alignment is completed is temporarily stopped by the stopper 43 which is a positioning member in the ascending forward direction. At this time, the glass substrate 46
The conveyance roller 41 also temporarily stops its rotation so as not to scratch. A detection camera detects an alignment mark of an alignment mark (for example, a “+”-shaped mark) on the substrate 46, with the traveling direction of the stopped substrate as the head. For example, when viewed from a detection camera for alignment,
As shown in FIG. 5, the alignment mark on the camera side is “□” type, and the alignment mark on the substrate is “10” type. This information is calculated by a calculation control unit (not shown) to calculate the lateral position shift amount on the α line and the vertical position shift amount on the β line. If the allowable values of the positional deviation amount are ± Δa and ± Δb,
At this time, the position of the substrate is adjusted based on the signal from the arithmetic control unit so that a1 ≦ a2 ± Δa and b1 ≦ b2 ± Δb. This signal serves for relative positioning with the relief pattern on the transfer roller which is fixed in advance. That is, the arithmetic control unit that inputs the first timing signal by the rotary encoder synchronized with the rotation of the transfer roller and the second timing signal by the alignment mark of the substrate takes the timing of superimposing the transfer roller and the substrate, Starts moving toward the transfer roller. As shown in FIG. 2, in front of the pressing roller, there are transport rollers 25 at regular intervals so that the substrate 213 can be smoothly transported on the XYθ stage 24, and each roller has a drive mechanism and a timing for determining a transport timing. It is controlled by the mechanism. In this way, the substrates 213 are conveyed at a fixed timing by the respective rollers being driven in synchronization with the vertical movement of the stopper 23 at the same time.

Next, the transfer section will be described with reference to FIG. FIG. 3A is a front view of the transfer portion. 3B is a sectional view taken along the line AA ′ of the transfer portion, and FIG. 3C is a view showing a relief pattern for “R” in the case of a mosaic type formed on the transfer roller. When the transfer film is transferred to the substrate, the cylinder shown in FIG. 3A descends and the transfer of the relief pattern is realized by the pressure generated between the transfer film and the pressing roller. Since the relief pattern has a size used for a color filter, the size of one pixel is about 100 μm. Relief height is usually 10
It is desirable to be about 50 μm, but it is appropriately changed according to the thickness of the transfer film. For example, the thickness of the transfer film may be appropriately set to about 1 μm to 200 μm.

At the same time, a suction port for fixing the transfer film is formed between the relief patterns on the transfer roller. FIG. 3B shows a cross section taken along the line AA ′ of the transfer roller of FIG. The transfer roller 35 is provided with a suction chamber 34 on a fixed transfer roller support 31, which is connected to a suction port 33 via a suction path. Therefore, when the transfer roller 35 rotates, suction is started when the suction port 33 and the suction chamber 34 are connected, and the transfer film is fixed. With such a mechanism, the transfer film is fixed on the transfer roller by suction only when it reaches a required rotation angle.

Finally, in FIG. 1, the transferred film 111 is taken up by the support film take-up unit 110 through the third dancer roller 15 ', and the color filter substrate 13 is formed with a colored layer and is discharged from the discharge port. To be done. still,
All of the above-described devices are mounted at a position lower than the substrate transfer section as shown in FIG. As a result of forming a color filter on a substrate using this color filter transfer device, not only a color filter could be produced with a high yield, but also a color liquid crystal display device using this showed excellent image quality.

[0010]

According to the first aspect of the invention, in order to manufacture a color filter with high quality, a mechanical system for discharging dust, dust, etc. is arranged at a position lower than the substrate to be transferred, so that the dust, dust, etc. are attached. The effect is to prevent. In the second invention, the production efficiency can be further enhanced in combination with the above effect. According to the third aspect of the present invention, the transfer film is formed on the embossing member by providing the cylindrical transfer roller, which has the relief pattern of the embossing member on which the color filter pattern is formed, with the suction portion for sucking the transfer film. By fixing to the substrate, only the coloring material corresponding to the relief pattern can be transferred onto the substrate with good quality and reliably. According to the fourth aspect of the present invention, by providing a detection unit for aligning the color filter substrate and the embossing member on the substrate transfer line and providing an alignment adjustment unit, alignment is reliably performed and pixel alignment accuracy is improved. This has the effect of producing an excellent color filter.

[Brief description of drawings]

FIG. 1 is a diagram showing a main configuration of a portion to which an image is transferred in an embodiment of the present invention.

FIG. 2 is a diagram showing a main configuration part of an alignment device for aligning a glass substrate and a constant relief pattern formed on a transfer roller in one embodiment of the present invention.

FIG. 3 is a detailed view of a transfer roller.

FIG. 4 is a top view of FIG.

FIG. 5 is a diagram showing an example of an alignment mark signal.

[Explanation of symbols]

 11 Transfer Roller 12 Pressing Roller 13 Substrate 14 Pixel 15 Dancer Roller 15 'Dancer Roller 15 "Dancer Roller 16 Transfer Film Supply Part 17 Inspection Light Source 18 Inspection Diffuser 19 Inspection Camera 110 Transfer Film Discharge Unit 111 Transfer Film 112 Conveyor Roller 21 Positioning Camera 22 Transparent member with alignment mark on the camera side 23 Stopper 24 XYθ stage 25 Conveyor roller 26 Stage base 27 Stage base 28 X stage 29 X stage guide 210 Y stage 211 Y stage guide 31 Transfer roller support 32 Relief pattern 33 Suction port 34 Suction Chamber 35 Transfer Roller 41 Conveyor Roller 42 Positioning Sensor 43 Stopper 44 XYθ Stage 45 Swing Plate 46 Substrate 46 Sensor

Claims (4)

[Claims] 1. A transfer film supply unit, a transfer unit for superimposing the transfer film and the substrate and transferring a color filter pattern onto the substrate by a transfer member, and a film after the transfer at a position lower than the substrate transport unit. A transfer device for a color filter, which is provided with a discharge part for discharging. 2. The transfer device for a color filter according to claim 1, wherein in the transfer section, the transfer member is a transfer roller for transferring from the lower side of the substrate for the color filter. . 3. The transfer roller of the transfer device according to claim 2,
3. A cylindrical embossing member on which a pattern of a color filter is formed, and a cylindrical embossing member of the transfer section are provided with a suction section for sucking the transfer film. A transfer device for a color filter according to the item. 4. A transparent substrate with an alignment mark on the camera side for aligning the color filter substrate and the embossing member, the mark detection camera, and the substrate transfer section according to claim 1 or 3. A position adjusting unit for adjusting the relative position based on a calculation result from a calculation control unit that calculates a relative position of the substrate and the embossing member based on a signal from the detection camera is provided. A transfer device for a color filter according to the first, second or third range.