| 摘要 |
PURPOSE:To prevent sprayed particles from clinging to the electron beam passage holes of a shadow mask, by removing the sprayed particles drifting near a nozzle, at the time of providing of a heavy metal application layer, so that the particles having passed through the shadow mask do not drift back to the base of the shadow mask. CONSTITUTION:When particles of water glass are sprayed from a nozzle 3, a suction fan 8 is put in operation to suck and remove drifting particles to prevent them from dropping to the base 14 of a shadow mask 14. Water is sprayed into the atmosphere under the base 14 to moisten particles 7 having passed through the base. As a result, the mass of each of the particles 7 is increased so that they drop to water. the particles 7 are thus kept from flying up to the base 14, to prevent an electron beam obstacle from being made on the inside circumferential surface of each electron beam passage hole 15.
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