JPH0197345A - Exposure system of shadow mask for color picture tube - Google Patents

Abstract

PURPOSE:To improve the utilization efficiency of an exposure system by making an illuminant part and a vacuum adherer relatively shiftable, and also making a mask pattern printable to plural vacuum adherers with one illuminant unit. CONSTITUTION:When one side of vacuum adherers adjacent to each other, for example, a vacuum adherer 2a ends its pattern printing and the other side vacuum adherer 2b is in a state of being printable, illuminant units 20a, 20b being situated as opposed to the adherer 2a are shifted to a broken line position to be opposed to the other side adherer 2b and printing takes place. During the period, vacuum suction of the adherer 2a is stopped and leaked to some extent, and then a close adhesion between a shadow mask material W and mask patterns 1a, 1b is released. This shadow mask material W is rolled on a takeup reel 11. Next, vacuum suction for sticking these mask patterns 1a, 1b close to the shadow mask material wound up is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an exposure system for a shadow mask for a color picture tube.

(Prior Art) A shadow mask disposed opposite to the phosphor screen of a shadow mask type color picture tube has a large number of electron beam passing holes on its opposing surface, and an electron gun passes through the electron beam passing holes. The electron beam is selectively made incident on a predetermined phosphor layer constituting the phosphor screen.

Conventionally, this shadow mask has been manufactured with a thickness of 0.1 to 0.
A photosensitive resin is coated on both sides of a band-shaped shadow mask material made of, for example, low carbon steel, about 2 mm thick, and a mask pattern is closely attached to both sides of the shadow mask material on which the photosensitive resin coating is formed, so-called double-sided exposure. After a predetermined pattern is printed on the photosensitive resin film using this method, it is developed and further chemically etched to form electron beam passage holes that penetrate between both surfaces of the shadow mask material. In this manufacturing method, in the mass production method, the strip-like shadow mask material is fed intermittently as a long length for exposure. Cut it and
Methods of exposing one sheet at a time are also known.

In either method, the exposure is conventionally performed as shown in Fig. 5 (
A) As shown in the figure, a plurality of vacuum adhesion devices (2a), (2b) each having mask patterns (1a), (1b) facing each other and aligned with each other are arbitrarily arranged, For each of the vacuum adhesion devices (2a), (2b)... A light source section (8) consisting of a light source (5) such as a mercury lamp, a reflecting mirror (6), a shutter (7), etc. is mounted on a pillar (4) erected on the
The exposure system is equipped with fixed light source units (9a) and (9b).

That is, for example, in the case of continuously exposing a long strip-shaped shadow mask material, there is a feed reel for the shadow mask material (W) on the negative side of each vacuum contact device (2a), (2b), etc. A take-up reel (11) is installed on the other side of (1, 0), and a shadow mask material (UL) is sent out between the mask patterns (1a) and (]b) at a constant pitch from the feed reel (10). Mask patterns (1a) and (1b) are applied to both sides of the mask using a vacuum suction device (not shown).
), the shutters (7) of the light source units (9a) and (9b) facing each other are opened, and the light emitted from the light source (5) is transferred to the mask pattern (1a).
), (]b) to irradiate the photosensitive resin coating formed on both sides of the shadow mask material (W). Then, the irradiation amount is adjusted to the vacuum adhesion device (28), (2b)...
・1flll with the receiver (not shown) attached to
A predetermined pattern is printed on the photosensitive resin coating on both sides while holding the photosensitive resin film. After that, the suction of the vacuum suction device is stopped, and the vacuum adhesion devices (2a), (2b)... are leaked to remove the shadow mask material (enemy) and each mask pattern (1a).
Release the close contact with (1b). Thereafter, the shadow mask material (W) on which the pattern has been printed is wound onto a take-up reel (10). In other words, the exposure process for this shadow mask is as follows: basic feed → mask pattern adhesion → pattern baking → leak → cord winding (material feed)
The cycle is repeated.

=3= By the way, in recent years, with the advent of high-output ultra-high pressure mercury lamps and metal halide lamps, illuminance has improved, and in the above exposure process cycle, the time required for pattern printing has been significantly shortened, making it the most time-consuming process. The step requiring this is vacuum suction to bring the mask pattern into close contact, and the time required for pattern printing is substantially less than 172 seconds of the total cycle time of the exposure process.

As a result, there arises a problem in that the actual utilization efficiency of the exposure apparatus is low and a large number of expensive exposure apparatuses are required.

(Problems to be Solved by the Invention) As mentioned above, with the advent of high-output light sources, the time required to print the photosensitive resin waves formed on both sides of the material in the exposure process of a shadow mask. IYjf has been significantly shortened, and vacuum suction for mask pattern adhesion has become the most time-consuming process, resulting in a substantial reduction in the utilization efficiency of the exposure apparatus.

This invention has been made in view of the above-mentioned problems, and aims to significantly improve the utilization efficiency of an exposure apparatus.

[Structure of the invention]

(Means for Solving the Problems) A plurality of vacuum adhesion devices are used to vacuum adhere mask patterns to both sides of a plate-shaped shadow mask material on which a photosensitive resin film is adhered, and the shadow mask material is In an exposure system for a shadow mask for a color picture tube, the system includes a plurality of light source units each having a light source section that prints a predetermined pattern on the photosensitive resin coating of the screen through a mask pattern in close contact with the photosensitive resin coating on both sides, At least the light source section and the vacuum contact device are made relatively movable, and the mask pattern can be printed onto a plurality of vacuum contact devices using one light source unit.

(Function) As described above, if at least the light source section and the vacuum adhesion device are configured to be movable relative to each other, while any one vacuum adhesion device is performing vacuum suction to bring the mask pattern into close contact with the shadow mask material. In addition, patterns can be printed by moving at least the light source part relative to another vacuum bonding device that has completed vacuum bonding, and printing can be performed with a small number of light source units, making it possible to utilize each device that makes up the exposure system. Efficiency can be significantly improved.

(Example) Hereinafter, the present invention will be described based on an example with reference to the drawings.

FIG. 1 shows an exposure system that is an embodiment of the present invention. This exposure system consists of opposing mask patterns (la
), (1b), a plurality of vacuum adhesion devices (2a),
(2b)...and this vacuum adhesion device (2a), (2b)
)... corresponding to each mask pattern (1a),
The following light source unit (2a) placed in front of (1b)
, (2b)...

On the negative side of the vacuum adhesion devices (2a), (2b)..., there is a feed for feeding a shadow mask material (11) with a photosensitive resin film formed on both sides between the mask patterns (1a) and (1b). A reel (10) is provided on the other side, and a take-up reel (11) for winding up the shadow mask material (w) on which the pattern printing between the mask patterns (1a) and (1b) has been completed is provided. . In addition, each vacuum adhesion device (2a), (2b)--... is used for mask pattern (la), shadow mask material (III) sent between mask patterns (1a) and (1b), (l
b) includes a vacuum suction device (not shown) that brings the light into close contact with each other under vacuum, and a light receiver that measures the amount of irradiation from each of the opposing light source units (20a) and (20b).

In addition, the light source units (20a), (20b)...
As shown in the same figure (B), there is a movable frame (21),
A light source (5) attached to a support (22) erected on this pedestal (21), a reflecting mirror (6), and a light source (5) provided on the front side of this reflecting mirror (6). It has a light source part (8) consisting of a shutter (7) etc. that arbitrarily blocks the radiation of , is configured to rotate together with the support column (21) as shown by the arrow (25).

In the exposure system of this example, a plurality of vacuum contact devices [(2a), (2b)... are arranged on the same line with their mask patterns (1a), (1b) facing the same direction. (Series arrangement), this vacuum adhesion device (2a), (
2b) - Two-piece light source unit (2oa), (20b)
) is installed so as to be able to move in parallel between the vacuum adhesion devices (2a) and (2b), keeping a constant distance from the respective mask patterns (la) and (lb), as shown by arrows (26).

(25) is a guide section consisting of a rail or the like that guides the running of the vehicle.

When the exposure system is configured as described above, one of the vacuum contact devices adjacent to each other, for example, the vacuum contact device (2a)
finishes pattern baking, and the other vacuum adhesion device (2b
) is in a state where pattern printing is possible, the light source units (20a) and (20b) located opposite the one vacuum contact device (2a) are connected to the other vacuum contact device (2a).
The pattern is printed by moving to the position indicated by the broken line (27) opposite to 2b). One of the vacuum adhesion devices (2a) that has completed pattern printing during that period stops vacuum suction and leaks, releasing the adhesion between the shadow mask material (V) and the mask patterns (1a) and (1b). .

Then, the shadow mask material after pattern baking (
W) onto the take-up reel (11) (at this time,
At the same time, the shadow mask material (W) is sent from the feed reel (10).
) is sent between the mask patterns (1a) and (1b)). Furthermore, after that, the mask patterns (1a) and (1b) are applied to the sent shadow mask material (W).
) and start vacuum suction to bring them into close contact.

The operation of this exposure system is as follows: vacuum contact device (2a), (2)
b) is shown in a flowchart in FIG. 2 as devices A and B, respectively.

By the way, when the exposure system is configured as described above, the conventional system that required 2N light source units for N vacuum contact devices (multiple units) can be replaced with N/2 fewer light source units (2a). , (2b) . . . , the required printing can be performed, and the utilization efficiency of the exposure device can be greatly improved compared to the conventional method. In other words, configuring the exposure system as described above not only reduces the number of light source units, but also reduces the amount of light source (5) used for it without reducing productivity, and also reduces the consumption required for exposure. Electricity can also be saved.

Furthermore, the exposure system of this example, as shown in FIG.
A plurality of vacuum bonding devices (2a), (2b), etc. are arranged in parallel with a predetermined interval, and each vacuum bonding device (2a),
(2b) - Light source unit (20a), (20b) between
・= can also be arranged.

In this case, every other vacuum adhesion device (2a), (2b), etc., for example, the vacuum adhesion device (2a), (2c) completes pattern printing, and the vacuum adhesion device (2b) in between finishes printing the pattern.
Assuming that pattern printing is possible, rotate the light source section (8) of the light source unit (20), which had been facing the vacuum adhering devices (2a) and (2c), respectively, to the vacuum adhering device. The pattern of the vacuum adhesion device (2b) can be printed toward the (2b) side. Vacuum adhesion devices (2a) and (2c) that completed pattern baking during this period
), stop vacuum suction +IL, leak and remove shadow mask material (II) and mask patterns (1a), (1b)
Break the close contact with. Then, the shadow mask material (W) that has been baked is wound onto the take-up reel (11) (at this time, the unexposed portion of the shadow mask material (W) is transferred from the feed reel (10) to the mask pattern (
1a) and (1b)). Furthermore, after that, vacuum suction is started to bring the mask patterns (1a) and (1b) into close contact with the fed-in shadow mask material (su).

The operation of the exposure equipment in this exposure system is vacuum-tightly mounted! (28), (Zb), and (2C) respectively in F/A,
The flowchart is shown in FIG. 4 as B-C.

By the way, if you configure the exposure system as described in 1.
N+1 light source units (
20a), (20b)... can perform pattern printing, and the light source units 1 to 20, which conventionally required -2N units, can be printed.
This can be performed using 2N-(N+1)=N-1 units, and as in the embodiment described above, the efficiency of use of each device in the exposure system can be greatly improved.

〔Effect of the invention〕

At least a light source section of a light source unit that prints a predetermined pattern via a mask pattern onto a photosensitive resin film formed on both sides of a shadow mask material, and a vacuum bonding unit that vacuum-adheres the mask pattern to the photosensitive resin film. If the shadow mask material is configured to be movable relative to the device, the shadow mask material is taken out from the vacuum bonding device after pattern baking is completed, and then, while a new unexposed shadow mask material is attached and the four preparations for pattern baking are performed, at least"
- Pattern printing can be performed by moving the light source section of the light source unit used for pattern printing relative to another vacuum bonding device that has completed vacuum bonding, greatly improving the utilization efficiency of exposure equipment with a small number of light source units. be able to.

[Brief explanation of the drawing]

Figures 1 to 4 are detailed explanatory diagrams of this invention.
Figures (A) and (B) are diagrams showing the arrangement relationship between the vacuum sealing device and the light source unit 1- and the configuration of the light source unit, respectively, and Figure 2 is an explanatory diagram of its operation shown in a flowchart. , FIG. 3 is a diagram showing the arrangement relationship between the vacuum sealing device and the light source unit in another embodiment, FIG. 4 is an explanatory diagram of its operation shown in a flowchart, and FIG. 5 (A)
and (B) are diagrams respectively showing the arrangement relationship between a conventional vacuum adhesion device and a light source unit 1-, and the configuration of the light source unit.

Claims (1)

[Scope of Claims] A plurality of vacuum adhering devices for vacuum adhering a mask pattern to both sides of a plate-shaped shadow mask material on which a photosensitive resin film has been deposited, and a photosensitive resin film on both sides of the shadow mask material. In an exposure system for a shadow mask for color image reception, the exposure system includes a plurality of light source units each including a light source unit that prints a predetermined pattern on the photosensitive resin coating on both sides through a mask pattern that is in close contact with the photosensitive resin film, at least the light source unit and the 1. An exposure system for a shadow mask for a color picture tube, characterized in that a vacuum contact device is movable relative to the vacuum contact device, and the mask pattern can be printed onto a plurality of vacuum contact devices using one light source unit.