Patent ID: 8614500
Filing Date: 2013-12-24
Classification: B05D,G03F,H01L

Abstract:
1. A film forming apparatus, comprising: a stage on which a coating target is placed; a coater for applying a material to a predetermined region on the coating target placed on the stage to form a coating film; a vapor supplier for generating solvent vapor capable of dissolving the coating film, the vapor supplier including a tank reserving the solvent, a first heater for heating the solvent in the tank thereby generating the solvent vapor, and a temperature sensor measuring a temperature of the solvent vapor in the tank; a blower for receiving the solvent vapor from the vapor supplier and for blowing the solvent vapor generated by the vapor supplier onto the coating film on the coating target placed on the stage; a transport line communicating the vapor supplier with the blower, the transport line for transporting the solvent vapor to the blower; a second heater for heating the transport line; a third heater for heating the blower; and a controller configured to control an amount of the solvent vapor to be blown by the blower by adjusting a temperature of the first heater based on the temperature measured by the temperature sensor so that the coating film is dissolved, to control the second heater so that a temperature of the transport line is higher than a dew-point temperature of the solvent vapor, and to control the third heater so that a temperature of the blower is higher than the dew-point temperature of the solvent vapor; wherein viscosity in a part of the coating film on a surface layer side is lower than that in a part thereof on the coating target side, and the viscosity in the part on the surface layer side and the viscosity of the coating target side take such values that prevent the coating film on the coating target from spreading upward near the peripheral edge preventing profusion of the peripheral edge from increasing in height not more than about 2 nm from the edge of the coating film.