PURPOSE: To improve the anti-doming effect by a film mainly made of tungsten by forming an electron beam reflecting film on the surface of the electron beam incident side of a shadow mask with tungsten powder added or coated with at least one kind of metal selected among a group of Ib group elements, platinum group elements, bismuth, copper and nickel.
CONSTITUTION: An electron beam reflecting film 5 mainly made of tungsten is formed on the surface of the incident side of the electron beam of a shadow mask 3. The tungsten powder added or coated with one or multiple kinds of metals 50-10000ppm selected among a group of metals less oxidized than tungsten such as Ib group elements, platinum group elements, bismuth, copper and nickel is used for the constituting material of the film 5. The tungsten powder added or coated with one or multiple kinds of metals 50-10000ppm selected among a group of metals such as magnesium, aluminum, IV A group elements, silicone, vanadium, manganese and molybdenum may be used.
| JPH0726961 | [Name of the device] Hair stopper |
YAMAMOTO MORIO
HANADA TORU
KIMURA HIROSHI
KOITABASHI MASAYASU
