| 摘要 |
PROBLEM TO BE SOLVED: To provide a coating film forming method for a cathode-ray tube enabling a uniform coating film without coating irregularity to be obtained in a short time. SOLUTION: A mounting part is sticked fast to an outer surface of a substantially rectangular bottom part of a panel 11 and supported by a carrier head with the panel 11 inclined and opened obliquely downward. While the carrier head is rotated at 10 to 20 rpm, a filter liquid 20 having a viscosity of 1 to 5 cPs/25 deg.C is spread substantially over the whole of an inner surface 11b of the panel 11. The rotation of the carrier head is stopped for 5 to 10 seconds, the panel 11 is horizontally oriented so that the longitudinal direction thereof runs substantially along the horizontal direction and that flow marks 20a are situated in positions lower than the center of the panel 11. Surplus filter liquid 20 flows on the inner surface 11b and cancels out the flow marks 20a or irregularity. The carrier head is rotated again at 100 to 150 rpm to shake off the surplus filter liquid 20 and the filter film of a uniform coating film is formed. Since the distance the surplus liquid flows out of an effective surface is short, the time can be shortened.
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