| 摘要 |
PURPOSE: A shadow mask for a color CRT is provided to enhance a color purity by preventing a mislanding of the electron beam as a doming is lowered by reducing a thermal deformation of the shadow mask. CONSTITUTION: An electron reflection film is formed at not only the surface of the shadow mask(7) but also the inner surface of the hole. The electron reflection film is printed by using a paste composed of powder of tungsten oxides(WO3), bismuth oxides(BiO3), and lead oxides(PbO) with 50-70 wt %, frit glass with 15-20 wt %, and solvent with 10-30 wt %. Therefore, a doming phenomenon is lowered by reducing a thermal deformation of the shadow mask through properly adjusting material having a high heat emit rate and a reflection efficiency of the electron beams.
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