JPH0731992B2 - Fluorescent display tube parts and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fluorescent display tube component in which a spacer frame portion and a mesh portion are integrated, and a manufacturing method thereof.

[Conventional technology]

Generally, a fluorescent display tube has a windshield as shown in Fig. 15.
(A), filament (B), mesa film (C), frame (E), measure lead (D), mesh part (control grid)
(F), a fluorescent substance electrode (anode electrode) (K) formed on the base glass (L), and a pad (anode electrode extraction part) (I), an anode conduction pattern connecting the pad and the fluorescent substance electrode (J), anode touch lead coupled to pad
(G) and a major lead (H) connected to the anode touch lead. In assembling, first, the spacer frame component as shown in FIG. 17 is subjected to heat treatment at high temperature to form an oxide film having good wettability with the glass sealing frit glass, and the anode touch lead (G) and The filament anchor support (P) is bent into a predetermined shape, and then the mesh part shown in Fig. 18 is aligned with its frame (E) 'and the frame (E) of the spacer frame part and is overlaid on the spacer frame part. , A large number of spot welds are performed from the mesh component side, and the side rails (N) are removed from both components to form an integral body of the spacer frame portion and the mesh portion.

And as shown in Fig. 16, the windshield (A) and the fluorescent electrode
(K), the anode conduction pattern (J) and the base glass (L) provided with the pad (I) are opposed to each other, and the frit glass is used as a binder between the filament (B) and the mesa film.
(C), the spacer frame part and the mesh part, the anode touch lead (G) connected to the pad, and the major lead (H) are sealed, and the windshield (A)
The periphery between the base glass (L) and the base glass (L) is sealed with frit glass, and some of the major leads (D) and (H) and the through-hole leads (M) are taken out of the display tube, and the grid driver
It is connected to a decoder driver and used as a display device for various meters of automobiles, various V, T, R displays, computer terminals, etc. In FIG. 17, 0 indicates a filament anchor.

However, in the process of spot welding the mesh portion to the spacer portion, there is a problem that the spot welding speed is slow, the mesh portion is damaged or deformed, and the yield is poor. Therefore, one surface of the metal plate having the thickness of the spacer portion A resist pattern similar to the shape of the mesh part to be formed on
A resist pattern having the same shape as the spacer portion to be formed was formed, a resist pattern having the same shape as the spacer portion to be formed was formed on the other surface, and the resist pattern was formed. A metal plate is etched from both sides to form a mesh portion and a spacer portion, the thickness of the mesh portion is made smaller than the thickness of the spacer portion, and then a method for producing a product having a mesh portion and a spacer portion for removing the resist pattern is described. Invented (Japanese Patent Publication No. 60-26830).

[Problems to be solved by the invention]

Although the above problems in the manufacturing process were solved by forming the spacer frame portion and the mesh portion integrally by etching as described above, the thickness of the mesh portion is formed by half-etching together with forming the mesh portion. Since the thickness is smaller than the thickness of the spacer part, the corrosion of the corner part of the mesh hole part is poor, and even if you try to form a hexagonal opening, an opening close to a round hole will be formed, and There is a problem that a mesh portion having a high rate cannot be obtained. Further, there is a problem that the inner wall surface portion of the mesh hole portion is obstructed to make it difficult to visually recognize from an oblique direction, and the viewing angle is limited.

Therefore, the problem to be solved by the present invention is that the viewing angle is wide,
Moreover, it is an object of the present invention to provide a fluorescent display tube component in which a mesh portion capable of forming a display portion of a fluorescent display tube having high transmittance and high brightness and a spacer frame portion are integrated.

[Means for solving problems]

As a result of research to solve the above-mentioned problems, the present inventor has made a mesh-like connection with a resist pattern for forming a frame and a first spacer frame part covering one side of a metal plate and a metal plate region to be a major lead. And a first resist pattern formed of a first mesh part forming resist pattern having an outer shape having a narrower width than the line part central part region in a line part region near the intersection of the line parts, A second spacer frame portion forming resist pattern that covers the frame and the metal plate area that serves as a major lead on the other surface of the metal plate, and a plurality of mesh-shaped line portions, which are located near the intersection of the line portions. The line portion area is narrower than the line portion central portion area, and is generally the first area.
Second resist pattern consisting of a second mesh part forming resist pattern having an outer shape having a line width narrower than that of the mesh part forming resist pattern of FIG. According to the method of forming the portion and simultaneously forming the mesh portion integrated with the frame on the second resist pattern side of the metal plate region corresponding to the mesh region, the frame portion is thinner than the thickness of the half-etched frame. The cross-sectional shape cut in the direction perpendicular to the line direction is an inverted triangle with the narrowest line width on the side facing the fluorescent body, and the inner wall surface of the mesh hole is visible even when viewed from an oblique direction. And the line width of the line part area near the intersection of the line parts is less than or equal to the line width of the center part of the line part, and the mesh hole is a corner part. It has a large opening in a shape with a small R and has a high transmittance, and the thickness of the portion where the line portions intersect is formed thicker than the thickness of the other line portion regions. It was found that a stable fluorescent display tube component can be obtained, and the present invention has been completed based on such knowledge.

That is, the first invention is that "a mesh is formed inside the frame integrally with the frame, and the mesh is finer than the thickness of the frame and is finely formed by a line portion having a line width of 50 μ or less. In a part for a fluorescent display tube in which a plurality of measure leads are integrally provided on the outer peripheral edge of the frame so as to project from the frame, a cross-sectional shape cut in a direction perpendicular to a line direction of a mesh forming line is a phosphor. The line width on the side facing the side is the narrowest triangular shape, and the thickness of the intersection of the line parts is formed thicker than the thickness of the other line part regions, and the line near the part where the line parts intersect. A part for a fluorescent display tube in which the line width of the partial region is less than or equal to the line width of the central region of the line portion ”is a gist.

Next, the second invention is that "a mesh is formed inside the frame integrally with the frame, and the mesh is finer than the thickness of the frame and has fine line portions having a line width of 50 μm or less. In a method of manufacturing a component for a fluorescent display tube in which a plurality of major leads are integrally provided on the outer peripheral edge of the frame so as to project from the frame, one side of the metal plate is covered with the frame and a metal plate region serving as the major lead. A first mesh having a first spacer frame portion forming resist pattern and a plurality of line portions connected in a mesh shape, and a line portion region near a portion where the line portions intersect has a narrower outer shape than a line portion central portion region. A first resist pattern including a part forming resist pattern is provided, and a second surface of the metal plate is coated with a frame and a metal plate region serving as a major lead. Of the spacer frame portion forming resist pattern and a plurality of line portions connected in a mesh shape, the line portion area near the intersection of the line portions is narrower than the line portion central area, and A second resist pattern including a second resist pattern for forming a mesh portion having an outer shape having a line width narrower than that of the resist pattern for forming a mesh portion is provided, and etching is performed from both sides of a metal plate to form a frame and a major lead. Of the metal plate area corresponding to the mesh area while forming
The method of manufacturing a component for a fluorescent display tube, wherein the resist pattern side is formed with a frame and an integral mesh that is thinner than the half-etched frame. ] Is the gist.

FIG. 1 shows an etching product of a fluorescent display tube component of the present invention.

In the figure, 21 is a frame, 22 is a major lead, 23 is a through hole lead, 24 is a mesh, 25 is an anode touch lead, 26 is a filament anchor support, 27 is a filament anchor, and 28 is a side rail.

Further, FIG. 2 shows a sectional view of a portion of the mesh (24).

3 to 5 show the opening of the mesh (24) in detail. FIG. 3 is a rear view, FIG. 4 is a sectional view taken along the line AA ′ in FIG. 3, and FIG. The drawing is a sectional view taken along the line BB 'of FIG. In FIG. 3, reference numeral 30 indicates a line portion that constitutes the mesh, and 31 indicates a portion where the line portions intersect.

A mesh (24) is formed inside the frame (21) integrally with the frame (21), and the mesh (24) is thinner than the thickness of the frame (21) and has fine lines with a line width of 50 μ or less. The frame (21) formed on the
In a part for a fluorescent display tube in which a plurality of major leads (22) are integrally projected with the frame (21) on the outer peripheral edge of the, the direction perpendicular to the line direction of the line part (30) constituting the mesh (24). The cross-sectional shape cut in the direction is an inverted triangle with the narrowest line width on the side facing the fluorescent body, and the thickness of the part (31) where the line parts (30) intersect is the thickness of the central part of the line part. It is formed thicker than that. The line width (W ₃₎ of the line area of the portion near the intersection of the line portion is the line width of the line portion center area (W ₂₎ or less. Since the line width of the line portion is changed in this way, the mesh hole portion is formed in a shape close to a hexagon. In addition, in the present invention, the shape of the mesh hole is not limited to a hexagon, and may be a square.

6 to 8 are enlarged views showing the openings of the mesh of the conventional fluorescent display tube component. FIG. 6 is a plan view, and FIG. 7 is a line A ″ -A arrow shown in FIG. Sectional view, 8th
The drawing is a sectional view taken along the line B ″ -B of FIG.

In the conventional product, the corners of the mesh holes are not opened, and the line area near the intersection of the line areas is wider than the center area of the line area.

Therefore, compared with the product of the present invention, the opening area is small and the transmittance is inferior.

9 to 12 show a method of manufacturing a component for a fluorescent display tube according to the present invention.

First, on one surface of the metal plate (1) as shown in FIG. 9, as shown in FIG. 10, a frame, a major lead, an anode touch lead,
It consists of filament anchor support, the part that constitutes the spacer frame part such as the filament anchor, and the first spacer frame part forming resist pattern (6) that covers the metal plate area that will be the through hole leads and the line part connected in a mesh shape. , The line portion area near the intersection of the line portions has a first resist pattern (2) formed of a first mesh portion forming resist pattern (7) in which the line portion has a narrower outer shape than the line portion central area. ), And a metal plate
(1) On the other side, the frame, measure lead, anode touch lead, filament anchor support, filament anchor, etc., which constitutes the spacer frame portion, and the second spacer frame portion, which covers the metal plate area to be the through hole lead Forming resist pattern
(6) ′ and a plurality of line parts connected in a mesh shape, the line part region near the intersection of the line parts is narrower than the line part central part region, and the first mesh part is formed as a whole. A second resist pattern (3) including a second mesh portion forming pattern (8) having an outer shape having a line width narrower than that of the working pattern (7) is provided.

Then, by etching from both sides, a spacer frame portion is formed as shown in FIG. 11, and at the same time, the second resist pattern side of the metal plate region corresponding to the mesh region is half-etched and cut in a direction perpendicular to the line direction. It is possible to form a mesh part having an inverted triangular cross section and integrated with the spacer frame part.

FIG. 12 shows a state in which the resist pattern has been peeled off after etching. Thus, in the manufacturing method of the present invention, for example, iron, steel, alloy steel, copper, copper alloy, aluminum, aluminum alloy, zinc, zinc alloy, nickel, nickel alloy, etc. can be applied as the metal plate. Further, as metal plates, KVO (Fe-Ni-Co alloy), 42 alloy (42% Ni-Fe alloy), 426 alloy (42% Ni-6% Cr Fe alloy), NS-1 (Fe
50%, Ni 50% alloy), SUS (stainless steel), SK (tool steel), KK (tool steel), tough pitch steel, deoxidized steel, phosphor bronze, brass, beryllium steel, nickel silver, etc. can be used. .

Next, a photosensitive solution that can be used for forming the resist is any commercially available one, for example, TESH.DOOL (polyvinyl alcohol / ammonium dichromate type) manufactured by Okamoto Chemical Co., Ltd., TE
SH.Glue (glue / ammonium dichromate), TESH.
Glue U-100 (glue / ammonium dichromate type) .AZ
O.TESH (polyvinyl alcohol / diazo compound type); Fuji-LON-D No. 0.3,5 (polyvinyl alcohol / ammonium dichromate type) from Fuji Yakuhin Kogyo Co., Ltd., Fujiresist No. 7.9, 14, 18 (polyvinyl alcohol)・ Ammonium dichromate), Fujiresist No.15,16,17,19,20
(Casein / ammonium dichromate type), Photonol (casein / ammonium dichromate type) and Fujiscreen coat (polyvinyl alcohol / ammonium dichromate type): Inoenal (polyvinyl alcohol / ammonium chromate type) manufactured by Automobile Industry Co., Ltd. system),
Inoenalone (polyvinyl alcohol / ammonium chromate), JI Cancor (casein / ammonium dichromate), inochored enamel (casein / ammonium dichromate) and Hauzon (polyvinyl alcohol / diazo compound); Inostoman Kodak Company KPR (Kodak Photo Resist), KPR-
2 Kodak. photo. Resist. Type-2), KPR-
3 (Kodak Photo Resist Type-3), KPL
(Kodak Photo Sensitive Lacquer), KOR
(Kodak Orthoresist), KMER (Kodak Metal Etch Resist) and KTFR (Kodak Thin Film Resist): FSR (Fuji Super Resist), FSR (Fuji Super Resist), FCR (Fuji Super Resist) manufactured by Fuji Pharmaceutical Co., Ltd. Fuji Chemical Resist), FPER (Fuji Photo Essist Resist), FNPR (Fuji New Photo Resist),
FMRN (Fuji Microresist Negative), FRR (Fuji Rabbit Resist) and FPPR (Fuji Positive Photoresist) Vinyl), EPPR (hard rubber type), OPR (hard rubber type), OPSR (hard rubber type) and G-90 casein / ammonium dichromate type).

Means for forming a resist by performing exposure, development, washing with water and drying through a pattern using these known sensitizing solutions can be carried out by usual known means.

The etching solution used in the present invention may be a conventionally known etching solution for the metal of the metal plate used. For iron, for example, ferric chloride solution, concentrated nitric acid + water, hydrochloric acid + nitric acid may be used. , Ferric chloride liquid for steel,
Concentrated nitric acid + water, hydrochloric acid + sulfuric acid, ferric chloride solution for alloy steel, concentrated nitric acid + water, hydrochloric acid + sulfuric acid, ferric chloride solution for steel, ammonium persulfate + mercuric chloride , Ferric chloride liquid, ammonium persulfate + mercuric chloride for steel alloys, sodium hydroxide liquid for aluminum,
Hydrochloric acid + water, ferric chloride liquid, sodium hydroxide liquid, hydrochloric acid + water, ferric chloride liquid for aluminum alloy, nitric acid for zinc, nitric acid for zinc alloy, Ferric chloride solution, hydrochloric acid + nitric acid can be used for nickel, and ferric chloride solution, hydrochloric acid + nitric acid can be used for nickel alloy.

In the present invention, the removal of the photoresist is carried out by dipping the dichromate-based resist in a 40% by weight caustic soda solution moistened at 50 ° C., and for the solvent-based photoresist, a dedicated stripping solution or a commercially available organic solvent (Triclen. Xylene, benzene, etc.).

Further, in the manufacturing method of the present invention, an original plate having a corner portion as shown in FIGS. 13 and 14 is used as an original plate of the mesh portion. It is possible to obtain an etched product that is etched into a small shape.

[Action]

In the fluorescent display tube component of the present invention, the mesh hole is widely opened in a shape having a small R at the corner, and the corner of the mesh hole is formed thicker than the thickness other than the corner. Therefore, the transmittance is very high,
Therefore, it is possible to obtain a component for a fluorescent display tube which has high brightness and which has stable mechanical strength even though the mesh hole is made fine. Further, since the cross-sectional shape of the line portion is an inverted triangle, it can be visually recognized over a wide range of viewing angles. Moreover, since the cross-sectional area of the line portion is small, an image can be displayed with low power consumption.

Next, in the method for manufacturing a fluorescent display tube component of the present invention, the etching of the narrow-width mesh portion-forming resist pattern side proceeds faster than the etching of the wide-width mesh portion-forming resist pattern side. Is half-etched on the side of the narrow mesh portion forming pattern, and the line portion of the mesh portion having a triangular cross section is formed.

〔Example〕

Dimensions of alloy consisting of 52% iron, 42% nickel and 6% chromium
A metal plate having a thickness of 500 m / m × 500 m / m and a thickness of 0.15 m / m was immersed in 40% by weight caustic soda solution heated to 50 ° C. for 5 minutes to dissolve and remove dirt oils and fats on the surface and dried.

Then, at room temperature of 25 ° C, G-90 manufactured by Tokyo Ohka Kogyo Co., Ltd.
(Casein-ammonium dichromate) Immerse the metal plate treated above in the photosensitive solution for 5 to 10 seconds, and gently pull it up without unevenness to evenly spread the photosensitive solution over the entire surface of the metal plate. It was applied so that it was around 6 μm. The metal plate coated with the photosensitizer is left at room temperature for about 5 minutes, then 80
It was placed in an oven at ℃ and dried for 20 minutes to form a photosensitive film. Remove the metal plate from the oven, leave it in the air for 5 minutes to cool, and then frame, measure lead, anode touch lead, filament anchor support,
The spacer frame portion such as a filament anchor, and the first spacer frame portion pattern corresponding to the through-hole lead and a plurality of line portions connected in a mesh form, and the corner portion as shown in FIG. The first original plate composed of the first mesh portion pattern having an outer shape in which the line area near the intersection of the parts is narrower than the center area of the line area is brought into close contact, and the frame is attached to the other photosensitive film surface. , A major lead, an anode touch lead, a filament anchor support, a portion constituting a spacer frame portion such as a filament anchor, and a second spacer frame portion pattern corresponding to a through hole lead and a plurality of line portions connected in a mesh shape, Line part near the part where the corner part is engraved and the line part intersects as shown in the 14th figure A second mesh part pattern whose area is narrower than the central part of the line part and whose overall line width is narrower than that of the first mesh part pattern shown in FIG. The original plate was adhered, exposed and baked for 120 to 180 seconds from the front and back using a sequinone lamp, and then developed. The exposed areas harden and become insoluble in water or warm water,
The unexposed portion was dissolved and removed by immersion in water (or warm water at 40 ° C.) for 20 to 30 seconds.

It was further dried and heat-treated at 200 to 300 ° C. for 4 minutes to completely cure the exposed portion.

The metal plate with the resist pattern formed as described above
It was immersed in ferric chloride solution at 50 ° Be 'at 50 ° C for 10 minutes and simultaneously etched from both sides. At this time, the spacer frame portion and the through-hole lead are formed, and the etching proceeds faster on the side of the mesh portion forming resist pattern having a narrow line width than on the side of the mesh portion forming resist pattern having a wide line width. It was half-etched, and was formed to be thinner than the spacer frame part, the cross-sectional shape of the line part was an inverted triangle, and the thickness of the part where the line part intersects was thicker than the thickness of the other line part regions. Then, the intermediate product obtained above is immersed in a 40 wt% caustic soda solution at 50 ° C. for 10 minutes to dissolve and remove the photoresist,
After drying, a fluorescent display tube component having a mesh portion and a spacer frame portion formed of the same material was obtained.

Next, examples of products obtained as described above are shown.

Spacer frame thickness 0.15m / m Spacer frame outer shape 80 × 200m / m Mesh outer shape 30 × 180m / m Mesh part line width (center) 30μ Mesh part line width (near intersection) 24μ Mesh part thickness (Central part) 50μ Mesh part thickness (intersection part) 65μ Mesh part transmittance 80% Comparative Example Same as Example 1, except that a spacer frame part pattern is provided instead of the first original plate and the second original plate. First
19 The third original plate having a plurality of line portions connected in a hexagonal mesh pattern as shown in the drawing, and the line portions having a uniform mesh portion pattern and only the spacer frame portion pattern, and the mesh portion area is Using the blank fourth original plate, etching was carried out from both sides after resist plate making to obtain a fluorescent display tube part having mesh holes as shown in FIG.

The transmittance of the obtained product was measured and found to be 72%.

〔The invention's effect〕

As described above in detail, according to the fluorescent display tube component of the present invention, it is possible to improve the luminance, which is the most important characteristic of the fluorescent display tube, reduce power consumption, and provide a fluorescent display tube with a wide viewing angle. be able to.

Further, according to the manufacturing method of the present invention, the mesh portion and the spacer frame portion are integrally formed of the same material from the metal plate having the thickness of the spacer frame portion only by the photoetching method, and the thickness of the mesh portion is Is smaller than the thickness of the spacer frame, the mesh holes are wide open, the transmittance is high, and the lines that make up the mesh are formed in an inverted triangular cross section, so that the viewing angle is wide. The parts can be manufactured with high yield and high accuracy.

[Brief description of drawings]

FIG. 1 is a plan view of an etching product including a fluorescent display tube component of the present invention, and FIG. 2 is a cross-sectional view of a mesh portion shown in FIG.
3 is a rear view of one mesh of the mesh portion, FIG. 4 is a sectional view taken along the line AA ′ in FIG. 3, and FIG. 5 is B in FIG.
-B 'line sectional view, FIG. 6 is a rear view of the mesh portion produced by the conventional method, FIG. 7 is a sectional view taken along the line A "-A of FIG. 6, and FIG. FIG. 9 to FIG. 12 are sectional views showing a manufacturing process by the manufacturing method of the present invention, and FIGS. 13 and 14 are mesh part patterns used in the embodiment of the present invention. FIG. 15 is an exploded perspective view of the fluorescent display tube, FIG. 16 is a sectional view of the fluorescent display tube, and FIG.
The figure is a plan view of the etching product of the spacer frame,
FIG. 18 is a plan view of the etching product of the mesh portion, and FIG. 19 is a plan view of the mesh portion forming pattern used in the comparative example. 21 …… Frame 22 …… Major lead 24 …… Mesh 30 …… Mesh line part 31 …… The intersection of the line parts 1 …… Metal plate 6,6 ′ …… For forming the first and second spacer frame parts Resist pattern 7,8 …… Resist pattern for forming mesh part 9 …… Mesh hole 10 …… Mesh part 11 …… Spacer frame part

Claims (2)

[Claims] 1. A mesh is integrally formed with the frame inside the frame, and the mesh is thinner than the thickness of the frame and is finely formed by line portions having a line width of 50 μm or less. In a fluorescent display tube component in which a plurality of major leads are integrally provided on the outer peripheral edge of the frame, a cross-sectional shape cut in a direction perpendicular to the line direction of the mesh forming part of the side facing the phosphor. The line width is the inverse triangle with the narrowest line width, the thickness of the intersection of the line parts is thicker than the thickness of other line parts, and the line width of the line part region near the part where the line parts intersect. Is less than or equal to the line width of the central portion of the line portion. 2. A mesh is formed integrally with the frame inside the frame, and the mesh is thinner than the thickness of the frame and is finely formed by a line portion having a line width of 50 μm or less. In a method of manufacturing a component for a fluorescent display tube in which a plurality of major leads are integrally projected on the outer peripheral edge of the frame,
And the first spacer frame portion forming resist pattern for covering the metal plate area to be the major lead and a plurality of line portions connected in a mesh shape, and the line portion area near the intersection of the line portions is closer to the center portion of the line portion. Also has a first resist pattern including a first mesh portion forming resist pattern having a narrow outer shape, and a second surface for covering the other surface of the metal plate with the frame and the metal plate region serving as the major lead. The spacer frame portion-forming resist pattern and a plurality of mesh-shaped line portions are formed. The line portion region from the intersection of the line portions is narrower than the line portion central region, and is generally the first region. And a second resist pattern for forming a mesh portion having an outer shape having a line width narrower than that of the resist pattern for forming a mesh portion. Etching is performed from both sides of the metal plate to form the frame and the major lead portion, and at the same time, the second resist pattern side of the metal plate region corresponding to the mesh region is thinner than the half-etched frame, which is integrated with the frame. Of manufacturing a component for a fluorescent display tube, which comprises forming a transparent mesh.