JP3802101B2 - Color filter transfer device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an apparatus for manufacturing a color filter having a plurality of colored pixels having different spectral characteristics on a substrate, and more particularly to an apparatus for transferring a transfer film for a color filter.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a film forming apparatus for a photosensitive resin during a color filter manufacturing process, there is a spin coating apparatus. According to this apparatus, a high-quality color filter with good film thickness uniformity can be obtained.
[0003]
However, considering the properties of the color filter for liquid crystal in particular, there have been many problems in terms of mass productivity and economy. Therefore, various devices for improving the coating apparatus have been proposed in the manufacturing process. Of these methods, a method in which a photosensitive resin is previously formed in a film shape and is subsequently pressure-bonded by heat or the like as in JP-A-63-187203 has been proposed as an effective method.
[0004]
According to this method, since the coating film is formed in advance, the drying time at the time of coating is not required, the mass production adaptability is improved, and the photosensitive resin can be used effectively, which is economical. Rich.
[0005]
In order to pressure-bond the film-like photosensitive resin to the substrate, a transfer film (transfer film is a film-like photosensitive resin that is sandwiched between a protective film and a support film to protect it. In this process, the color filter is placed on a glass substrate, heated and bonded, and the support film is peeled off after the transfer is completed.
[0006]
[Problems to be solved by the invention]
However, although the transfer film is heat-pressed by heat, the transfer film often tends to be peeled off at the end of the substrate, which has been a problem in reliably mass-producing the transfer film continuously. This is because the end portion of the substrate is particularly difficult to heat because the heat easily escapes.
[0007]
Accordingly, the present invention has been proposed in view of the above problems, and provides a transfer device for a color filter which realizes stable transfer of a transfer film and has high mass productivity.
[0008]
[Means for Solving the Problems]
That is, the gist of the first invention is that a transfer film supply unit, a substrate supply unit, a transfer film cut to a predetermined size, and a preheated substrate are overlapped by a transfer roller and a heated pressure roller. In a color filter transfer device provided with a transfer portion for transferring the photosensitive resin on the transfer film to the substrate, and a discharge portion for discharging the transfer film and the substrate simultaneously, the transfer roller is provided with the transfer film. the partial heating section for heating the tip end portion of the moving direction of the transfer film in a direction perpendicular to the moving direction is provided, wherein the partial heating unit, on the transfer roller, the direction of the straight line perpendicular to the moving direction of said transfer film It is an object of the present invention to provide a color filter transfer device that is continuously or discontinuously arranged .
[0010]
One embodiment of the present invention is shown in the sectional view of FIG. 1 (taken along the line AA ′ in FIG. 2), and the operation will be described with reference to this figure.
1) The support film 112 and the photosensitive resin film 14 constituting the transfer film move between the guide roller 13 and the claw portion 15 of the transfer roller 11 in synchronization with the rotation of the transfer roller 11.
2) The sensor 110 recognizes that the support film 112 and the photosensitive resin film 14 are in the vicinity of the claw portion 15.
3) The sensor 111 recognizes that the ends of the support film 112 and the photosensitive resin film 14 have come to a position where they can be sandwiched between the claws 15. (When both sensors do not detect, the warning is automatically stopped, or the warning is issued and the transfer roll is continuously rotated without pinching the transfer film, and is pinched by the next claw portion 15 '.)
4) The nail | claw part 15 closes and pinches | interposes only the both ends of the support film 112 and the photosensitive resin film 14 front-end | tip. The contact portion between the claw portion 15 and the transfer film is provided with an elastic member such as rubber so that the support film 112 and the photosensitive resin film 14 are not damaged.
5) The transfer films 14 and 112 are heated by the pre-heated partial heating unit 16. The heating part is preferably made of a material that easily conducts heat, and metals and ceramics are suitable. Moreover, in FIG. 1, although the partial heating part is heated with the heat-transfer wire via the power supply cord 17, it cannot be overemphasized that it can apply variously if it is not only this but heat generating bodies, such as what is called a surface heating apparatus. .
The heating temperature of the partial heating unit 16 can be appropriately selected within a range where the transfer film does not melt, but is preferably selected within a range of 30 ° C. to 80 ° C. above the temperatures of the transfer roller 11 and the pressing roller 12.
[0011]
FIG. 2 is a front view showing an embodiment of the present invention. The embodiment in which the partial heating units 26 are discontinuously arranged as shown in FIG. 2A or the partial heating as shown in FIG. 2B. There is an embodiment in which the portions 26 are continuously arranged.
[0012]
【Example】
Hereinafter, in order to explain the content of the present invention more specifically, the process until the transfer film is transferred to the substrate will be described in order along the process with reference to FIG.
FIG. 3 is an overall view of the transfer apparatus of the present invention.
[0013]
Usually, the structure of the transfer film 31 consists of three layers: a protective film, a film-like photosensitive resin, and a support film. Therefore, it is necessary to transfer only the photosensitive resin used for the color filter by separating them to the substrate.
[0014]
The transfer film 31 is set as a continuous roll in the supply unit 32 of the apparatus. The supply unit 32 has one roll, but in order to further improve the production efficiency, a plurality of rolls may be set, or an auto paster that can automatically connect a film may be used.
[0015]
The first, second, and third nip rollers 33, 34, and 35 pull the transfer film 31 from the supply section 32 of the transfer film 31 in synchronization with each other. The transfer film 31 from the supply unit 32 passes through the dancer roller 36 for tension control and then reaches the mark reading unit 315 through the first nip roller 33. The mark reading unit 315 is provided for reading information preliminarily written on the transfer film 31. For example, if it is quality information, a defective transfer film portion is not transferred.
[0016]
Here, the dancer roller 36 for tension control provided in front of the supply unit 31 is set with a weight of 5 to 30 kilograms, and the tension is kept constant by changing the position of the dancer roller 36. This is because when the transfer film 31 is strongly pulled or loosened, the dancer roller 36 applies a feedback action. Note that the discharge side 37 side of the protective film can be maintained at a constant tension by a similar device.
[0017]
Next, the transfer film 31 is sandwiched between the second and third nip rollers 34 and 35 and cut by the cutter 316 according to the size of the substrate 313. The amount of film to be cut at this time is calculated from the size of the substrate set in the setting unit of the control unit. In the case of the present embodiment, the calculation is performed so as to be slightly smaller than the set size of the substrate. The transfer film peeled off and cut to a certain size by the cutter 316 moves toward the transfer roller 39 while being sandwiched between the guide rollers 38.
The cutter 316 can be a rotary cutter or the like.
[0018]
The protective film is peeled off by the second nip roller 34 and wound around the discharge unit 37 through the dancer roller 36 '.
[0019]
On the other hand, the substrate is preheated. This is because sufficient heat is applied to the substrate to improve the adhesion of the film-like photosensitive resin to the substrate. This substrate is sent to the transfer roller 39.
[0020]
The transfer roller 39 expands the gap between the claw portion (not shown in FIG. 3) and the transfer roller 39 by sensing the first sensor (not shown in FIG. 3) when the transfer film 31 approaches, A method is adopted in which the transfer film 31 is sandwiched between the transfer roller by the movement of a claw portion (not shown in FIG. 3) by sensing a sensor (not shown in FIG. 3).
At the same time, the end of the transfer film is heated by the partial heating unit built in the transfer roller 39.
[0021]
Below the transfer roller 39 is a heated pressing roller 310 that heats the substrate 313 from below the substrate 313 while pressing the transfer film 31 and the substrate 313 to bring the substrate 313 to a high temperature (80 ° C. to 170 ° C.).
[0022]
Before and after the heated pressure roller 310, there are transport rollers 312 at regular intervals so that the substrate 313 is transported smoothly, and each roller 312 is connected by a timing mechanism using a timing belt. The substrate is transported at a fixed timing while synchronizing with the driving device of the carry-in table 311.
[0023]
The board | substrate 313 which transferred the transfer film 31 is conveyed to the peeling part of the transfer film 31, the support film of the transfer film stuck from the board | substrate 31 is peeled, and photosensitive resin is left on a board | substrate. As another method, there is a case where the support film is not peeled before the exposure, the exposure is performed while holding the support film, and the support film is peeled off after the fact. This is because most of the photosensitive materials used are radical polymerization type, and radical deactivation can be prevented by obtaining the effect of an oxygen blocking film.
[0024]
The color filter produced in this way can maintain the high quality of the photosensitive material economically without impairing the production efficiency in the transfer process.
[0025]
[Action and effect of the invention]
According to the present invention, due to the effect of the partial heating unit, the adhesiveness between the film-like photosensitive resin and the substrate is improved, and there is an effect that the accident that the film is peeled off during the transfer process is reduced.
[0026]
Moreover, when peeling a support film after transfer, there exists an effect of preventing the accident that a film-like photosensitive resin also peels from a board | substrate simultaneously.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of the periphery of a transfer roller portion of a main invention of the present invention (FIG. 2 cut along A to A ′).
FIG. 2 is an enlarged front view of the periphery of a transfer roller portion of the main invention of the present invention.
FIG. 3 is an example of a transfer film transfer apparatus using the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Transfer roller 12 Press roller 13 Guide roller 14 Transfer film (film-like photosensitive resin part)
15 Claw part 15 'Claw part 16 Partial heating part 16' Partial heating part 17 Power supply cord 17 'Power supply cord 18 Conductive ring 110 Sensor 110' Sensor 111 Sensor 111 'Sensor 112 Transfer film (support film)
113 Substrate 21 Transfer roller 25 Claw portion 26 Partial heating portion 27 Power supply device 28 Conductive ring 29 Contact portion 210 Sensor 211 Sensor 212 Power supply 31 Transfer film 32 Transfer film supply device 33 Nip roller 34 Nip roller 35 Nip roller 36 Dancer roller 36 'Dancer roller 37 Protective film Discharge unit 38 Guide roller 39 Transfer roller 310 Press roller 311 Conveying table 312 Conveying roller 313 Substrate 314 Conveying member 315 Mark reading device 316 Cutter 316 ′ Cutter receiver 317 Heating device 318 Stopper

Claims (1)

The transfer film supply unit, the substrate supply unit, the transfer film cut to a predetermined size, and the preheated substrate are overlapped by a transfer roller and a heated pressing roller, and the photosensitive resin on the transfer film is In a color filter transfer apparatus provided with a transfer portion for transferring to a substrate, and a discharge portion for simultaneously discharging the transfer film and the substrate, the transfer film in a direction perpendicular to the transfer roller moving direction to the transfer roller the partial heating section for heating the tip end portion of the moving direction is provided in the partial heating unit, on the transfer roller, continuously or discontinuously arranged in the direction of the straight line perpendicular to the moving direction of said transfer film A transfer device for a color filter, characterized by comprising:

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