JPH103858A - Spin coating device and manufacture of cathode-ray tube with functional film using the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-quality coating film with its small coating irregularity and improve productivity when one or plural layers of functional film are formed on a CRT face plane by using a spin coating method. SOLUTION: Down-flow is formed by means of an air charging port 29 provided above a spin machine, local air discharge means 30, 31, and 32 provided in a spin machine hood 22, screen type air flow noise prevention plates 38a and 38b are attached to an upper face 37b of a straightening board 37 for making rotational symmetry a face plane of a rectangular CRT9 so that a turbulent flow is not generated on a face plane of a CRT9 held on a funnel pad jig 16 of the spin machine and rotated. In addition, injection into the CRT face plane of a coating liquid 19 is performed at a stage at which a rotation speed of the CRT9 is raised.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spin-coating apparatus for forming one or more layers of a smooth film on the face of a cathode-ray tube by a spin-coating method, and a cathode-ray tube with a functional film using the apparatus. And a method for producing the same.

[0002]

2. Description of the Related Art With the recent trend toward OA, FA, and personal computers, VDT (VIDEO DI
SPLAY TERMINAL) has been used by not only specialists but also ordinary users as in the past. For this reason, high performance color cathode ray tubes are no longer special, but are routinely used by ordinary users. For this reason, it is desired that the cathode ray tube be further enhanced in performance under various usage conditions.

As one of them, there is an antistatic function for preventing a charge-up of the cathode ray tube face surface.

In the case of VDT work, since the display surface and the user are close to each other, a discharge phenomenon occurs when the user approaches the outer surface of the charged face surface when the power is turned on and off, and the user is disturbed. This causes inconvenience that causes discomfort.

[0005] In the antistatic treatment type cathode ray tube, the charge charged up on the outer surface of the face surface is designed to escape to the ground by giving conductivity to the outer surface of the face surface. As a method of imparting conductivity, a method of forming a transparent conductive film on the outer surface of the face surface is generally used.

FIG. 6 shows a configuration example of a cathode ray tube (hereinafter, referred to as "CRT") having such an antistatic function. In the figure, 1 is a face plate portion, 2 is a funnel portion, and 3 is a neck portion, which incorporates an electron gun (not shown). 4 is a high-voltage button, 5 is a smooth film having conductivity formed on the face surface (hereinafter, referred to as “antistatic film”), 6
Is a metal explosion-proof band, 7 is a mounting ear, 8 is a conductive tape or a conductive paste, 1 to 8 constitute a CRT 9, and the antistatic film 5 is a conductive tape 8, an explosion-proof band 6,
It is grounded via a ground wire 10. 11 is a deflection yoke.

[0007] The antistatic film 5 formed on the outer surface of the face plate portion 1 is required to have sufficient conductivity, hardness that does not cause practical problems, and adhesion to the face plate surface. For this reason, a silica solution in which a conductive filler is dispersed is applied to the surface of the face plate unit 1 by a spin coating method, and the temperature is relatively high, for example, 120 to 200 °.
It is generally formed by performing a baking process with C.
As such a silica solution, a conductive filler such as In ₂ O ₃ ; Sn (tin-containing indium oxide) or SnO ₂ ; Sb (antimony-containing tin oxide) is mixed and dispersed in an alcohol solution of silicon (Si) alkoxide. Is used.

[0008] Reflection of external light on the CRT face
In particular, it has been pointed out as a factor that promotes operator fatigue in VDT work, and as a countermeasure, "anti-glare treatment", which forms fine irregularities on the CRT face surface and blurs the contour of reflection, has been generally used. . However, with the recent increase in the performance of computers, the demand for higher resolution of the VDT has increased, and deterioration of display information due to unevenness due to an antiglare effect has become a problem. The problem is that by mounting a low-reflection plate on which an optical multilayer thin film is formed by vapor deposition, reflection of external light can be reduced without deteriorating display information. Only used in some high-end models.

In response to such movement, one layer or two or
A technique for forming a six-layer optical thin film by a spin coating method to obtain a low reflection effect has been developed.

FIG. 7 is an enlarged sectional view showing the structure of the two-layer low-reflection film 12, in which a conductive material 13 (antimony-containing tin oxide or the like) is provided on the surface of the face plate portion 1 (refractive index 1.54) serving as a substrate. Is formed, and a silica layer is formed as the low index layer 15. Two-layer low reflection film 1
In the case of 2, the reflectance spectrum is V
The spectrum is shaped like a letter, but its minimum value is
5 can be controlled by designing the film thickness to be 1/4 of the wavelength at which the minimum reflectance is obtained. A in FIG. 8 shows a reflectance spectrum of a two-layer low-reflection film designed to have a minimum reflectance around 550 nm.

The thickness of the two-layer low-reflection film 12 is smaller than that of the conventional transparent and colored antistatic film by one order. Further, the interference effect of light is used to reduce reflection, and a change in film thickness strongly appears in the color tone of reflected light. When the minimum reflectance of the two-layer low-reflection film 12 is set to around 550 nm, the color tone of the reflected light greatly changes from yellow to magenta to cyan with a change in film thickness of several tens of nm. Therefore, C
When external light such as fluorescent light is reflected on the face of the RT,
The change in the thickness of the low reflection film appears as unevenness in the color tone of the reflected light.

In the spin coating method for performing these surface treatments, the film thickness is adjusted by high-speed spin-off rotation. FIG. 9 is a longitudinal sectional view of a conventional spin coater, and FIG. 10 is a plan view thereof. The spin coater converts the CRT 9 into the funnel 2 by the funnel receiving jig 16.
, And the mounting ear 7 of the explosion-proof band 6 is supported by a lug receiving jig 17 to fix the explosion-proof band 6 with the face side up.
The funnel unit receiving jig 16 is driven to rotate in the direction of arrow A by a spinning machine driving unit 18 for rotating, and the CRT
Spin 9.

The coating liquid 19 is injected from an injection nozzle 21 attached to a tip of a rotary injection arm 20. The rotation operation of the injection arm 20 is performed from the outside of the spinning machine hood 22 to the center of the CRT 9 and immediately returns to the initial position after the coating liquid 19 is injected.

The coating liquid 19 is injected at a relatively low speed of about 80 revolutions per minute. This is called injection rotation. In the injection rotation, the coating liquid 19 is spread on the outer surface of the face plate portion 1 which is a coating substrate. Thereafter, the number of rotations of the spinning machine driving unit 18 increases, and the operation shifts to a high-speed swinging rotation for controlling the film thickness. The rotation speed at this time reaches 100 to 160 rotations per minute. Here, the drying of the coating liquid 19 starts with the control of the film thickness. Next, the rotation speed is again reduced to about 80 rotations per minute,
Finally dry.

As described above, the spin coating method includes three steps: low-speed rotation for coating liquid injection, high-speed rotation for film thickness adjustment, and low-speed rotation for final drying. When a plurality of layers are coated, this step is repeated.

In the high-speed swing-out rotation, the face of the CRT 9 having a rectangular face is rotated by 100 to 160 rpm. When the curvature of the face surface is constituted by a single curvature, as shown in FIG. 11, the distance D from the center of the face surface to each axis end is calculated as follows: short axis Ds <long axis D1 <diagonal axis D
d, and the head H is in the relationship of short axis Hs <long axis H1 <diagonal axis Hd. Therefore, when the CRT 9 rotates, the turbulence flows on the face surface due to the distance from the center of the peripheral part and the change of the head. Occurs.

This turbulence prevents uniform drying of the coating film, which is controlled by swirling, and causes unevenness in film thickness and film characteristics. The nonuniformity of the film thickness and film characteristics was such that the color antistatic film could be recognized as a shade of color tone, but in the case of the low reflection film, a slight change in the film thickness became a significant difference in the reflected light color. Because of the appearance, color unevenness of the reflected light occurs as described above, which is not preferable in appearance.

In addition, the non-uniformity of the film thickness is remarkable in a corner portion from the long side to the short side of the face surface in the rotation direction. In order to cope with this, it is effective to attach a screen-type windbreak prevention plate at the location where the occurrence occurs. However, although the unevenness of the reflected light at the corner portion can be suppressed by this, the result of the in-plane spiral color unevenness is unfavorable.

Further, in the spin coating method, most of the applied coating liquid is shaken off at the time of shake-off rotation. The coating liquid that has been shaken off is the spinning machine hood 2
2 and mist is generated. In addition, when the coating liquid that has been shaken off is dried, it becomes a coating residue. The turbulence generated at the time of spinning flies up the mist and scum of the coating liquid and adheres to the face surface, causing spots and defects on the coating film.

Even in the transparent and colored antistatic films, spots and defects are typical of defective items, which is a major problem in improving productivity. In a coating film utilizing the interference effect of light, such as a low reflection coating, the disorder of the film thickness appears in the reflected light color. Although the light is not blocked, a disadvantage that the interference color of the reflected light is different occurs, which significantly impairs the appearance.

[0021]

As described above, in the conventional spin coater, when a CRT having a rectangular face is rotated at a high speed, turbulence is generated on the face, and the turbulence is uniform. Prevent dryness,
There is a problem that in-plane unevenness is caused due to non-uniform film thickness, and the appearance is impaired. In addition, there is a problem that turbulence causes foreign matters, mist, and coat waste to be rolled up to easily cause spots and defective defects, thereby lowering productivity.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a spin coating apparatus capable of suppressing turbulence generated on a face of a CRT and a coating film using the apparatus to eliminate unevenness of a coating film. It is an object of the present invention to obtain a spin coater capable of improving quality and suppressing defects due to spots and defects and improving productivity, and a method of manufacturing a CRT with a functional film using the spin coater.

[0023]

According to the present invention, there is provided a spin coater for rotating a cathode ray tube supported with a face surface facing upward, a means for supplying a coating liquid to the face surface, and an upper part of the spin machine. An air supply means for forming a downflow toward the face surface of the cathode ray tube by a local exhaust duct provided below a hood surrounding the periphery of the spin machine and an air supply duct arranged in the vicinity of the cathode ray tube; A rectifying plate having an upper surface formed in a curved surface following the face surface of the cathode ray tube, and disposed on the upper surface of the rectifying plate, along the outside of the long side and the short side of the cathode ray tube, and near the center line. And a screen-type windbreak prevention plate extending to the downstream side in the rotation direction.

According to this spin coater, a downflow toward the face of the CRT is formed, and a rectifier and a screen-type windbreak prevention plate are provided on the spinning machine. Turbulence generated on the surface can be suppressed.

Further, according to the method for manufacturing a cathode ray tube with a functional film according to the present invention, when one or more layers of a smooth film are formed on the face surface of the cathode ray tube using the above-mentioned spin coater, The turbulence generated in the portion is rectified so that the coating liquid is applied and dried.

According to this method of manufacturing a cathode ray tube with a functional film, the above-mentioned spin coater is used to measure the downflow wind speed, the timing of injecting the coating liquid onto the CRT face surface, and the rotation speed of the CRT during injection of the coating liquid. By properly controlling the
A CRT having a more preferable appearance can be manufactured.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a longitudinal sectional view showing the entire configuration of a spin coater according to Embodiment 1 of the present invention, and the same reference numerals as those in FIG. 9 denote the same or corresponding parts. In the figure, reference numeral 23 denotes a spin coat booth, 24 denotes a down flow generator, which is composed of an air supply fan 25, a damper 26, a primary clean filter 27, and a secondary clean filter 28, and an air flow blows downward from an air supply port 29. Is done. 3
Reference numeral 0 denotes a spinning machine exhaust duct provided below the spinning machine hood 22, and includes a damper 31 and a spinning machine exhaust fan 32.
And the air flow around the CRT 9 is efficiently formed. Further, an exhaust duct 33 for the entirety is provided below the spin coat booth 23 and exhausted by a damper 34 and an exhaust fan 35 for the booth.

FIG. 2 is a longitudinal sectional view showing the structure inside the spinning machine hood, and FIG. 3 is a plan view thereof. Reference numeral 36 denotes a cylindrical spinning machine drum which is integrally fixed to the funnel receiving jig 16 and has a spinning machine driving section. 18 drives in the direction of arrow A. 3
Reference numeral 7 denotes a rectifying plate fixed to the upper surface of the spinning machine drum 36,
The CRT 9 is configured to be fixed at the mounting ear 7. Reference numeral 38a denotes a screen-type windbreak prevention plate for the short side which is set up outside the short side of the CRT 9 on the upper surface of the rectifier 37.
Is a screen type windbreak prevention plate for a long side, and 39 is a drain and a boiler.

Next, the operation will be described. The CRT 9 is transferred by a transfer robot (not shown) and placed on the funnel receiving jig 16. The funnel portion receiving jig 16 can be moved up and down. The jig 16 moves up when transferring the CRT 9 and moves down during spin coating. When the funnel receiving jig 16 is lowered, the CRT 9 is drawn into the rectifier 37.

Next, the rectifier 37 and the screen type windbreak prevention plate 3
The configuration of 8a and 38b will be described. The first embodiment is directed to a 51 cm CRT with a low reflection coat for VDT. The outer diameter of this CRT is 458 m long side.
m, short side 362 mm, diagonal 549 mm. Since the gap between the opening 37a of the rectifier 37 and the long and short sides of the CRT 9 was set to 10 mm, the opening 37a of the rectifier 37 was formed in a rectangular shape of 468 × 372 mm.

As shown in FIG. 4, the upper surface 37b of the rectifier 37 has a radius of curvature R of 1300 mm at the periphery of the outer surface of the face panel 1, so that the angle α of the following equation with respect to the horizontal plane is obtained. Thus, it was formed on a slope where the outer peripheral direction became lower. α = Sin ⁻¹ {(distance from center of face surface) / (radius of curvature of peripheral portion of face surface)}

The screen type windbreak prevention plates 38a, 38b
Is erected on the upper surface 37b of the rectifier 37 as shown in FIGS. 1 to 3, and the position and size of the
Extending from the center line of the long side and the short side along the respective sides in the downstream direction in the rotational direction.
7 is mounted 7 mm outside from the end of the opening 37a. Also, the size of the short-side screen-type windbreak prevention plate 38a and the long-side screen-type windbreak prevention plate 38b is 50 mm from the corner of the face plate 1, and the upper end is horizontal. In addition, the length is the short side screen-type windbreak prevention plate 3.
8a is approximately half the length of the short side of the CRT 9 and the long side screen-type windbreak prevention plate 38b is 1 length of the long side of the CRT 9
/ 2, which is longer by a predetermined length, for example, 1/3 of the length of the short side.

The diameter of the spinning hood 22 is 100
Although formed at 0 mm, this may be determined according to the maximum CRT size to be spin-coated. The rectifier 37
Is formed to be 70% of the inner diameter of the spinning machine hood 22 and is therefore 700 mm. The face surface of the CRT 9 mounted on the funnel receiving jig 16 is 90 mm lower than the upper end of the spinning machine hood 22 with a CRT of 51 cm. The rectifying plate 37 includes a cylindrical spinning machine drum 36.
Is fixed to the upper end of the
It is rotated at an arbitrary rotation speed up to 60 rpm.

Below the spinning machine hood 22, four exhaust ducts 30 are provided. The exhaust capacity is determined from the balance with the air supply capacity from above the spinning machine. As shown in FIG. 1, an air supply port 29 is provided in the upper part of the spinning machine, and a local exhaust port 30 is provided in the spinning machine hood 22, so that a downflow around the CRT is efficiently formed. A damper is provided in each of the air supply and exhaust sections, and the exhaust capacity is adjustable, and the airflow outside the spinning machine is exhausted from an exhaust duct 33 for the entire spin coat booth 23.

The downflow wind speed was adjusted to be 0.5 m / s at the end of the rectifier 37 and 0.2 m / s at the center of the face of the CRT 9. Further, it is desirable that the inside of the spin coat booth 23 is set to a slightly positive pressure as compared with the outside air.

Further, water is always filled in the drainage liquid and the inside 39, thereby preventing the solid content of the excess coating liquid shaken off during spin coating from solidifying into dust.
The coating liquid 19 is supplied from an injection nozzle 21 attached to a tip of an injection nozzle arm 20 which stands by outside a spinner hood 22. This nozzle arm 20
Is configured to be pivotable to the center of the face of the CRT 9 when the coating liquid is injected, and to be able to move up and down in order to inject the coating liquid 19 near the face of the CRT 9. The supply of the coating liquid 19 is performed by pumping using a pump and pressurizing, or a method utilizing free fall by a head tank. Further, the injection nozzles 21 are attached to the tip of the injection nozzle arm 20 by the number of types of the coating liquid to be applied. In the first embodiment, two nozzles are provided for two-layer low-reflection coating. I have.

The spin conditions were set as follows.
It takes 2.0 seconds for the spinning machine to rise from the stop to 80 revolutions per minute. The injection of the first coating liquid is performed 1.5 seconds after the start of rotation of the spinning machine, the injection time is 2.0 seconds, and the liquid volume is 65 cc. Thereafter, it is accelerated to 150 rotations per minute, which is the shake-off rotation, and shakes off for 30 seconds.
Seconds.

The second liquid has the same injection timing as the first liquid, an injection time of 1.5 seconds, a liquid amount of 45 cc, and the same spin schedule. Such a spin condition is expressed by CR
It is determined not by the T size but by the type of coating liquid.

Table 1 shows the relationship between the size of the screen type windbreak prevention plate, the wind speed of the downflow, and the film forming property.

[0040]

[Table 1]

In Table 1, the amount of protrusion of the long-side screen type windbreak prevention plate indicates the length extending beyond the extension of the short side, and the conditions (1) to (4) when the downflow wind speed is changed. This is a result of the film forming property. From this, the wind speed of the down flow is 0.3 to 0.7 m /
s, 0.1 to 0.1 at the center of the face surface of the CRT 9.
It was found that the range of 3 m / s was good. The condition is that the length of the long side screen-type windbreak prevention plate 38b is changed to 230 mm.

Using the apparatus having such a configuration and the manufacturing conditions, a two-layer low reflection film was formed on a 51 cm CRT.
A coating liquid (1 liquid) in which ultrafine tin oxide particles were dispersed was used as a high refractive material, and a silica sol solution (2 liquid) was used as a low refractive material. 1 solution, 2 under the above spin conditions
When the film forming property was confirmed after the application of the liquid, no unevenness of the coating film such as color unevenness in the corner portion and in-plane spiral color unevenness was observed, and a uniform film could be obtained. In addition, there was no influence of mist generated when the coating liquid was shaken off, and there was no occurrence of stains or defects that would impair the quality.

Embodiment 2 FIG. 5 is a diagram showing a coating liquid injection timing according to the second embodiment. As the size of the pipe becomes larger and the curved surface of the face becomes more complicated (for example, a cylindrical shape), it becomes more difficult to spread the coating liquid uniformly on the face. A characteristic defect at this time is that a trace of the spreading of the coating liquid remains in a streak shape (this is called a streak defect). The uneven streaks cause irregularities in the film thickness, and the interference color of reflection looks different.

In FIG. 5, the range from the stop state to the injection rotation is divided into the following three zones. Zone A CRT is stopped Zone B CRT is rotating up to the injection rotation Zone C CRT is at a constant rotation of the injection rotation The coating liquid injection timing is as follows. Divided into timing. I CRT stop (Zone A) II CRT rotation start (change point from zone A to B) III CRT rotation acceleration (Zone B) IV CRT constant speed rotation (Zone C) The timing of these injections is CRT It does not depend on the size.

Table 2 shows the relationship between the coating liquid injection timings I to IV and the film quality.
It can be seen that when the injection is performed between 40 rpm and 80 rpm during the spin acceleration of I, no streak defect occurs and no defect such as liquid dripping occurs.

[0046]

[Table 2]

Based on the above results, a two-layer low reflection film was formed on a 50 cm cylindrical CRT. The same spin coater as in the first embodiment was used, the injection nozzle 21 was fixed to the center of the face of the CRT, and a timer was set so that the coating liquid was injected at the timing III based on the results in Table 2. That is, since it takes two seconds from the stopped state to reach 80 injection rotations from the stopped state, the timer is set so that the injection of the coating liquid is started 1.5 seconds after the rotation of the spinning machine is started. Injected 65 cc in 0 seconds. Spin schedule is 80 rotations for injection (3 seconds) for one liquid, and high-speed swinging 1
The test was performed at 50 rotations (30 seconds) and at a low speed of 80 rotations (30 seconds). After confirming the drying, the second liquid was also performed according to the same schedule.

As a result, even on a curved surface having a direction that is not rotationally symmetric such as a cylindrical CRT, film formation unevenness due to liquid spreading such as uneven streaks does not occur, and a uniform film can be obtained. .

In the first embodiment described above, the CRT face surface has a spherically symmetrical single curvature. However, the face surface may have an aspherical shape or a cylindrical shape. The same effect can be obtained by forming a rotationally symmetric shape that is connected by a smooth surface from the end of the face surface to the outer end of the rectifier.

[0050]

As described above, according to the present invention, the rectifying plate for making the face of the CRT rotationally symmetric and the rectifying plate provided at the corner portion are provided for the coating unevenness and the corner portion unevenness due to the turbulent flow generated at the time of spinning. The turbulence generated at the corners from the long side to the short side of the face surface was suppressed by forming a downflow airflow in the screen-type windbreak prevention plate and the spinning machine hood. A highly functional film can be obtained.

In addition, by rectifying the airflow on the face of the CRT so as not to generate turbulence as described above, it is possible to prevent mist and coat dust generated at the time of spin coating, so that the mist or coat waste can be added to the coating film. Can be prevented from adhering and causing defects such as spots.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the entire structure of a spin coater according to Embodiment 1 of the present invention.

FIG. 2 is a longitudinal sectional view illustrating a configuration of a main part of the first embodiment.

FIG. 3 is a plan view showing a configuration of a main part of the first embodiment.

FIG. 4 is a diagram showing the relationship between the face surface of the cathode ray tube according to the first embodiment and a rectifier with a screen type windbreak prevention plate.

FIG. 5 is a timing chart showing a relationship between a coating liquid injection timing and a rotation state of a spinning machine according to a second embodiment.

FIG. 6 is a side view of a cathode ray tube having an antistatic function.

FIG. 7 is an enlarged cross-sectional view showing the structure of an antistatic two-layer low-reflection film.

FIG. 8 is a reflectance spectrum diagram of a two-layer low-reflection film.

FIG. 9 is a longitudinal sectional view showing a configuration of a conventional spin coater.

FIG. 10 is a plan view showing a configuration of a conventional spin coater.

FIG. 11 is a diagram illustrating a distance from a face center of a CRT face surface having a single curvature and a head of each axial end from the face center.

[Explanation of symbols]

16 funnel receiving jig, 18 spinning machine drive unit, 1
9 coating liquid, 20 injection nozzle arm, 21
Injection nozzle, 22 spin machine hood, 23 spin coat booth, 24 down flow generator, 25 air supply fan, 26, 31, 34 damper, 27 primary clean filter, 28 secondary clean filter, 29 air inlet, 30 spin machine Exhaust duct, 32 spin machine exhaust fan, 33 booth exhaust duct, 35 booth exhaust fan, 36 spin machine drum, 37 rectifier, 37
a Opening, 37b Upper surface, 38a Screen-type windbreak prevention plate for short side, 38b Screen-type windbreak prevention plate for long side, 39
Drainage and yu.

Claims (6)

[Claims] 1. A spinning machine for rotating a cathode ray tube supported with a face surface facing upward, means for supplying a coating liquid to the face surface, and an air supply duct disposed above the spinning machine and a periphery of the spinning machine. Air supply means for forming a downflow toward the face surface of the cathode ray tube by a local exhaust duct provided below the surrounding hood, and formed on a curved surface surrounding the cathode ray tube and continuing to the face surface of the cathode ray tube. Rectifier plate having an upper surface, and a screen-type wind disposed on the upper surface of the rectifier plate, extending along the outside of the long side and the short side of the cathode ray tube and extending downstream from the vicinity of the center line in the rotational direction. Spin coater with cutting prevention plate. 2. The screen-type windbreak prevention plates on the long side and the short side are respectively disposed outside a predetermined dimension from the outer end of each side of the face panel. Is formed at a predetermined height from the corner of the face surface. The length of the long side is longer than 1/2 of the length of the long side of the face surface, and the length of the short side is the face surface. 2. The spin coating apparatus according to claim 1, wherein the length of the short side is approximately one half of the length of the short side. 3. A cathode ray tube with a functional film, comprising: rectifying a turbulent flow generated at a corner of a face surface by using the spin coater according to claim 1 to apply and dry a coating liquid. Method. 4. The wind speed of the down flow is 0.1 m / s to 0.3 m / s at the center of the face surface of the cathode ray tube, and 0.3 m / s to 0.7 m / s at the end of the rectifier. The method for producing a cathode ray tube with a functional film according to claim 3, wherein 5. The method for producing a cathode ray tube with a functional film according to claim 3, wherein the supply of the coating liquid is performed at the center of the face surface and during acceleration of rotation. 6. The method for producing a cathode ray tube with a functional film according to claim 5, wherein the number of revolutions at the start of the injection of the coating liquid is between 40 rpm and 80 rpm.