JPH03159039A - Fluorescent character display tube - Google Patents

Abstract

PURPOSE:To improve the adhesion of an Al thin-film to a light-transmissive insulating substrate and the etching property thereof by arranging, on a substrate a wiring conductor and an anodic conductor, each formed of the Al thin-film prepared through the process of making the whole of or the part of a metallic thin-film itself non-reflective, respectively. CONSTITUTION:A wiring conductor and a light-transmissive anodic conductor 2, each formed of a metallic thin-film, are respectively arranged on one surface of a light- transmissive insulting substrate 1 and then a phosphor layer 5 which emits light as a result of the strike of electrons radiated from filament-like cathodes against the phosphor layer 5 is laid on the anodic conductor 2. The light emission of this phosphor layer 5 is accordingly observed from the other surface-side of the light-transmissive insulating substrate 1 via both the light-transmissive anodic conductor 2 and the light- transmissive insulating substrate 1. Since a fluorescent character display tube has the wiring conductor and the anodic conductor 2 both of which are arranged on the light-transmissive insulating substrate and formed of the non-reflective metal Al thin- film made of one kind of metal, improvements can be made on the adhesion of the Al thin-film to the light-transmissive insulating substrate 1 and on the etching property thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fluorescent display tube, and more particularly to a flat-emitting type fluorescent display tube in which anti-reflection treatment is applied to the A and FF films.

[Conventional technology]

A flat-emitting fluorescent display tube with conventional anti-reflection treatment (hereinafter referred to as an NR flat-emitting fluorescent display tube) has a light-transmitting insulating substrate 1, as shown in the anode substrate of a conventional fluorescent display tube in FIG.
The structure was such that a colored thin film 6, a wiring conductor made of an AA film, and an anode conductor 7 were disposed thereon, a phosphor 5 was disposed on the anode conductor portion, and an insulating layer 4 was disposed on the other portions.

[Problem to be solved by the invention]

This conventional NR flat-emitting fluorescent display tube has a colored thin film coated as an anti-reflection film in addition to the AA film.
Since different materials such as a film and a colored thin film are used, there are the following problems.

■ Colored thin films not only become colored when deposited, but also
The Affl film has good adhesion to the translucent insulating substrate, and
It was necessary to choose a material with good etching processability.

(2) Generally speaking, different etching solutions must be used for etching the Ap film and the colored thin film, and selective etching solutions that do not cause damage to each other must be selected.

■ For the colored thin film, we had to choose a material that would not impair the characteristics of the fluorescent display tube (do not deteriorate the phosphor, etc.).

[Means to solve the problem]

In the fluorescent display tube of the present invention, the whole or a part of the Aρ film itself (
The Affl film (transparent insulating substrate side) is made non-reflective, and the Affl film is made non-reflective.
1 film (hereinafter referred to as non-reflective AI2 film), on which wiring conductors and anode conductors are arranged.More specifically, the Aρ film is temporarily nitrided to make it non-reflective. This has been achieved.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows the anode substrate of the fluorescent display tube of the present invention (Example 1)
It is.

A wiring conductor and an anode conductor 2 (film thickness 1 μm) made of a non-reflective Au film (overall) are arranged on a transparent insulating substrate 1, a phosphor 5 is arranged on the anode conductor, and an insulating layer 4 is arranged in other parts. The structure is such that

Figure 2 shows the anode substrate of the fluorescent display tube of the present invention (Example 2)
It is.

The difference from FIG. 1 (Example 1) is that the wiring conductor and anode conductor 2 made of a non-reflective A4 film (entirely) were changed to the wiring conductor and anode conductor 3 made of a non-reflective Aρ film (partially). In the wiring conductor and anode conductor 3 made of this non-reflective Au film (partially), 500 parts of the 1 μm Aβ film on the transparent insulating substrate side (i.e., the display surface side of the fluorescent display tube) were made non-reflective. It is something.

〔Effect of the invention〕

As explained above, the present invention is based on conventional AI! Since the two-layer structure made of different materials such as the film and the colored thin film was changed to the one-layer or two-layer structure made of the same material as the Al2 film, the following effects are obtained.

■ The non-reflective AI2 film of the present invention is made of only the same material as the Au film used for the anode substrate of general fluorescent display tubes, so it has excellent adhesion to the transparent insulating substrate and etching processability. It is in good condition with no problems at all.

■ Since it is one type of material and the same type of material as the conventionally used Au film, it can be processed in one step using only the conventional A1 etching solution. (Conventionally, colored thin film etching was a separate process.) ■ Since it is one type of material and is the same material as the conventionally used Al1 film, there is no concern that the characteristics of the fluorescent display tube will be impaired (deterioration of the phosphor, etc.).

■ Unlike conventional colored thin film etching, there is no separate processing using a separate etching solution, so there is no risk of damage to the aluminum film.

■ Since there is no separate processing of the colored thin film, it is possible to shorten the process and reduce costs by not using materials for the colored thin film or etching solution.

[Brief explanation of the drawing]

FIG. 1 shows an anode substrate of a fluorescent display tube of the present invention (Example 1);
FIG. 2 shows the anode substrate of the fluorescent display tube of the present invention (Example 2);
FIG. 3 shows an anode substrate of a conventional fluorescent display tube. 1... Translucent insulating substrate, 2... Non-reflective AI! Wiring conductor and anode conductor by membrane (whole), 3...
... Wiring conductor and anode conductor made of non-reflective A4 film (part), 4 ... Insulating layer, 5 ... Phosphor,
6... Colored thin film, 7... Wiring conductor and anode conductor made of Au film.

Claims (2)

[Claims] (1) A wiring conductor made of a metal thin film and a transparent anode conductor are arranged on one surface of a transparent insulating substrate, and light is emitted by the bombardment of electrons emitted from a filament-shaped cathode onto the anode conductor. A phosphor layer is deposited to transmit the light emitted from the phosphor layer through the light-transmitting anode conductor and the light-transmitting insulating substrate.
In a fluorescent display tube that can be observed from the other side of the light-transmitting insulating substrate, a wiring conductor and an anode conductor made of a non-reflective metal thin film made of one type of metal are disposed on the light-transmitting insulating substrate. A fluorescent display tube comprising: (2) The fluorescent display tube according to claim 1, wherein the metal thin film is made of aluminum (Al).