Patent ID: 8677933

Claim:
A film forming apparatus comprising: a stage on which a coating object is placed; a rotation mechanism configured to rotate the stage about a rotation axis extending in a normal direction of a surface of the coating object; an application nozzle configured to supply coating material to the surface of the coating object; an application moving mechanism configured to move a position of the application nozzle above the stage along the surface of the coating object; a controller configured to control the rotation mechanism and application moving mechanism to rotate the stage and move the position of the application nozzle between a rotation center of the stage and an outer edge thereof and control the application nozzle to apply the coating material to the surface of the coating object and control a vibration controller; a sound wave generator configured to generate a sound wave to be projected onto a surface of the coating film formed on the coating object, the sound wave generator comprising: a sonic transducer configured to convert an electric energy to a sonic mechanical vibration to generate the sound wave; said vibration controller configured to supply a driving voltage to the sonic transducer to operate the sonic transducer; and a displacement sensor configured to detect a displacement of a profile of the coating film and transmit said displacement of the profile of said coating film to said controller wherein the controller is configured to control the vibration controller to adjust the sound wave to be projected onto the surface of the coating film according to the detected displacement of the profile of the coating film.