Unlock instant, AI-driven research and patent intelligence for your innovation.

Colour cathode-ray tube and manufacturing method, and composite material for vapor deposition

A technology of cathode ray tube and manufacturing method, which is applied in the direction of cathode ray tube/electron beam tube, tube/lamp screen manufacturing, sputtering coating, etc., and can solve the problem of decreased light reflectivity of Al layer, deterioration of phosphor characteristics, and Al layer Reduce reflectivity and other issues, achieve good display characteristics, suppress shadow mask arching, and improve luminance

Inactive Publication Date: 2002-03-27
KK TOSHIBA
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, although the metal back layer formed by this method has a structure in which an Al layer and a Ni layer (or Fe layer) are sequentially laminated from the side close to the phosphor surface immediately after vapor deposition, the subsequent heating in the manufacture of a cathode ray tube process, Al and Ni will interdiffuse
Moreover, since Ni diffuses into the Al layer close to the fluorescent surface, there is a problem that the light reflectance of the Al layer is reduced to 94% to 97% of that of pure Al.
In addition, in the metal back layer in which the Al layer and the Fe layer are laminated, since Fe diffuses into the Al layer, there is a problem that the reflectance of the Al layer decreases to 93 to 96%.
Another problem is that Ni or Fe diffused into the Al layer adjacent to the phosphor surface will deteriorate the characteristics of the phosphor itself.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Colour cathode-ray tube and manufacturing method, and composite material for vapor deposition
  • Colour cathode-ray tube and manufacturing method, and composite material for vapor deposition
  • Colour cathode-ray tube and manufacturing method, and composite material for vapor deposition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Prepare nitrogen atomized Al powder (maximum particle size 150 μm, average particle size 70 μm) with oxygen concentration below 1000 ppm and Fe powder with maximum particle size 30 μm and average particle size 5 μm 3 o 4 Powder. Thereafter, these powders were divided into Al powder: Fe 3 o 4 Powder=8.5:1.5 ratio (atomic ratio) was mixed, and then the mixed powder was molded with a hydraulic press to obtain a round rod-shaped molded body with an outer diameter of 5 mm and a length of 30 cm.

[0064] In addition, a cylindrical sleeve of pure Al (purity: 99.9%) having an inner diameter of 5 mm, an outer diameter of 12 mm, and a length of 35 mm was prepared as an outer covering material.

[0065] Next, the cylindrical sleeve made of pure Al is pickled, and the molded body from which the surface oxide film has been removed is inserted into the hollow interior. Then, one end of the sleeve made of pure Al was sealed, the air inside was removed from the other end, and the e...

Embodiment 2

[0071] Al powder (with a maximum particle size of 70 μm and an average particle size of 65 μm) and NiO powder with a maximum particle size of 20 μm and an average particle size of 5 μm prepared by the quenching centrifugal spray method with an oxygen concentration below 100 ppm were prepared. These powders were then mixed at a ratio (atomic ratio) of Al powder:NiO powder=9:1, and the mixed powder was molded with a hydraulic press to obtain a round rod-shaped molded body with an outer diameter of 5 mm and a length of 30 cm.

[0072] In addition, a cylindrical sleeve made of pure Al (purity: 99.9%) with an inner diameter of 5 mm, an outer diameter of 12 mm, and a length of 35 cm was prepared as an outer covering material.

[0073] Next, the cylindrical sleeve made of pure Al is pickled to remove surface oxide film and dirt, and then a molded body composed of a mixture of Al powder and NiO powder is inserted into the hollow interior. Then, one end of the sleeve made of pure Al wa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a color cathode ray tube, manufacturing method thereof and composite material for vapor deposition. The color cathode ray tube comprises a metal back layer containing a co-vapor deposition layer such as Al or the like and a metal oxide high in heat absorptivity, such as Fe2O3, Fe3O4, NiO, NiFe2O4, Cr2O3, MnO2, CoO or the like. The metal back layer may be manufactured at low costs and may be high in heat absorption and may not deteriorate in reflectivity in the course of heating. In addition, the metal back layer is formed by means of vacuum deposition by the use of composite material for a vapor deposition. The composite material comprises bar-like core formed of a mixture of metal powder such as Al and metal oxide powder high in heat absorptivity and a clad formed of metal such as Al or the like covering the core in close proximity therewith. The composite material is stable in vapor deposition properties.

Description

(1) Technical field [0001] The present invention relates to a color cathode ray tube, a manufacturing method thereof and a composite material for vapor deposition. In more detail, it relates to a color cathode ray tube in which the phosphor surface on the inner surface of the glass panel has a metal back layer with good heat absorption, a method for manufacturing the same, and a compound for vapor deposition for forming the metal back layer with good heat absorption. Material. (2) Background technology [0002] In the glass bulb of the general shadow mask type color cathode tube, there are electron guns that generate three beams of electron beams, fluorescent screens that emit blue, green, and red light due to the collision of the electron beams, and a shadow mask. The shadow mask is used for color selection, so that the three electron beams generated by the electron gun collide with the phosphor layers of corresponding colors respectively. [0003] A metal back layer such...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/24H01J9/20H01J9/22H01J29/28
CPCH01J29/28H01J9/20
Inventor 二阶堂胜盐泽仁志田岛义浩
Owner KK TOSHIBA