PURPOSE: To apply overall with good efficiency while removing stains due to the stuck dirty drops by dipping a face plate part of a cathode-ray tube face down into a coating liquid tank for applying a coating liquid followed by pulling it up and rotating the cathode-ray tube at full speed to unify a film.

CONSTITUTION: A face plate part 4 of a cathode-ray tube 3 is dipped into a coating liquid tank 1 housing the coating liquid 2 able to give conductivity such as an alcohol solution of Si alkoxide in the state of face down. Thereby, the coating liquid 2 is applied to the outer surface of the face plate part 4 overall and uniformly. By making the whole of the cathode-ray tube 3, to whose face plate part 4 the coating liquid 2 is applied, to rise together with a spin coating machine 16, the face plate part 4 is pulled up from the tank 1, while in this state the cathode-ray tube 3 is rotated at full speed accompanying with full speed rotation of the spin coating machine 16. Thereby, the film thickness of a transparent conductive film 11 is unified.