Apparatus and method for coating organic film

A method for coating an organic film, wherein the method comprises:

• heating and evaporating an organic material to generate uniform organic gas;
• uniformly charging the uniform organic gas for obtaining charged organic gas;
• accelerating and moving the charged organic gas toward the substrate under an effect of an electric filed to form the organic film on the substrate,
• wherein accelerating and moving the charged organic gas toward the substrate under an effect of an electric filed to form the organic film on the substrate comprises:
• generating the electric field by a potential difference between an electrode plate arranged in top of a spray chamber and base of the spray chamber, when a bias voltage being applied by an external power supply;
• after the charged organic gas reaches the spray chamber, downwardly accelerating and moving the charged organic gas under an effect of a downward electric field force;
• after the charged organic gas reaches the spray head arranged at bottom of the spray chamber, spraying the charged organic gas out of the spray head;
• and
• depositing the sprayed organic gas which is passed through a mask to form the organic film on the substrate.